Entries |
Document | Title | Date |
20080286183 | Control of combustion system emissions - A process for capturing undesirable combustion products produced in a high temperature combustion system. Very finely sized particles of alkaline earth carbonates or hydroxides, with or without added ground fly ash, are provided in slurry form and are injected into the high temperature zone of a furnace. The particles flash calcine to provide substantially unagglomerated particles having a particle size of less than about 0.5 microns to capture and neutralize SOx, NOx, and toxic chemicals. | 11-20-2008 |
20090010829 | Reducing Agent Composition - The invention relates to a reducing agent composition for use in the catalytic reduction process of nitrogen oxides in exhaust gases, the composition containing 20-40 w % of urea, 19-40 w % of ammonium formate, and water. | 01-08-2009 |
20090148368 | AIR POLLUTION CONTROL - In a method of controlling air pollution, a combustion gas is passed through a slurry of an alkaline-earth metal sulfide and a redox buffer (e.g., a phosphate), preferably in combination with an alkaline-earth metal carbonate and/or hydroxide. A composition for removing a heavy metal from a combustion gas is also provided, as an aerosolized, aqueous dispersion or slurry of an alkaline-earth metal sulfide and a buffering agent. A solid residue of the air pollution control process is also described. | 06-11-2009 |
20090257932 | FLUE GAS DESULFURIZATION PROCESS - A process for desulfurizing an SO | 10-15-2009 |
20090317314 | Particle Separator and Method for Removing Particles from an Exhaust Gas Stream of an Internal Combustion Engine - A particle separator and method for removing particles from an exhaust gas stream of an internal combustion engine. Differing flow regions having different flow conditions are formed in the particle separator. The differing flow regions are configured such that essentially particles having different, defined sizes and/or masses are adapted to be separated out of the exhaust gas stream in the differing flow regions. The exhaust gas stream is adapted to flow through at least portions of the particle separator. | 12-24-2009 |
20090324469 | Zero platinum group metal catalysts - The present invention relates improving the performance of nitrogen oxide reduction by exposing rich exhaust to catalysts systems comprising a catalyst, wherein the catalyst systems are free of platinum group metals. The present invention also relates to improving reduction of carbon monoxide and hydrocarbon in exhaust by introducing air into a portion of the exhaust between a first catalyst system and a second catalyst system. The present invention also relates to improving nitrogen oxide, carbon monoxide and hydrocarbon reduction by (1) exposing rich exhaust to a first catalysts system, wherein the exhaust has an R value of greater than 1.0 and the first catalyst system comprises a catalyst and is free of platinum group metals and (2) introducing air into a portion of the exhaust in between the first catalyst system and a second catalyst system, wherein the second catalyst system is free of platinum group metals. | 12-31-2009 |
20100143222 | EXHAUST CONDENSATE REMOVAL APPARATUS FOR ABATEMENT SYSTEM - Exhaust condensate removal apparatuses for abatement systems and methods of removing exhaust condensate from abatement systems are described. An exhaust condensate removal apparatus includes a cabinet exhaust and a process gas exhaust, the process exhaust openly cross-exchanged with the cabinet exhaust. Another exhaust condensate removal apparatus includes a cabinet exhaust and a process gas exhaust, the process exhaust closedly cross-exchanged with the cabinet exhaust. | 06-10-2010 |
20100296989 | Molecular Conversion Processing of Greenhouse Gases of Global Warming Effect and Conversion Units Employing a Solid Particle Trap - Molecular conversion processing of greenhouse gases of global warming effect and conversion units employing a solid particle trap. This is an industrial process capable of changing the chemical composition of the greenhouse gases from any source, such as the internal combustion engine, factory chimney and others, through the conversion of gas molecules to form new compounds such as clean gases. This is done by molecular conversion processing conversion unit with a solid particle trap, consisting of a plasma conversion chamber (II) that produces a plasma jet, and an electrostatic filter (III) for the collection of solid particles. | 11-25-2010 |
20110008228 | USE OF AQUEOUS GUANIDINIUM FORMATE SOLUTIONS FOR THE SELECTIVE CATALYTIC REDUCTION OF NITROGEN OXIDES IN EXHAUST GASES OF VEHICLES - The invention relates to the use of aqueous guanidinium formiate solutions, optionally combined with urea and/or ammonia and/or ammonium salts, for the selective catalytic reduction of nitrogen oxides using ammonia in exhaust gases of vehicles. The inventive guanidinium formiate solutions enable a reduction of the nitrogen oxides by approximately 90%. Furthermore, said guanidinium formiate solutions can enable an increase in the ammonia forming potential from 0.2 kg, corresponding to prior art, up to 0.4 kg ammonia per litre of guanidinium formiate, along with freezing resistance (freezing point below −25° C.). The risk of corrosion of the inventive guanidinium formiate solutions is also significantly reduced compared to that of solutions containing ammonium formiate. | 01-13-2011 |
20110064632 | Staged Catalyst System and Method of Using the Same - One aspect of the present invention is directed to a staged catalyst system for reducing gases in the exhaust from a combustion engine. In one embodiment, the staged catalyst system includes an integrated particulate filter block supporting thereupon a first selective catalytic reduction catalyst; and a flow-through catalyst block supporting thereupon a second selective catalytic reduction catalyst, wherein the integrated particulate filter block is disposed downstream of the combustion engine and upstream of the flow-through catalyst block. | 03-17-2011 |
20110123421 | ZONED CATALYZED SOOT FILTER - The present invention relates to a catalyzed soot filter which comprises a wall flow substrate with an inlet end, an outlet end, a substrate axial length extending between the inlet end and the outlet end, and a plurality of passages defined by internal walls of the wall flow substrate wherein the plurality of passages comprise inlet passages having an open inlet end and a closed outlet end, and outlet passages having a closed inlet end and an open outlet end, and wherein the internal walls of the inlet passages comprise a zoned first inlet coating, the internal walls of the outlet passages comprise a zoned first outlet coating, and wherein the first inlet coating and the first outlet coating are present on the wall flow substrate at a coating loading ratio of less than 0.5. | 05-26-2011 |
20110158871 | EXHAUST SYSTEM FOR A VEHICULAR POSITIVE IGNITION INTERNAL COMBUSTION ENGINE - An exhaust system for a vehicular positive ignition internal combustion engine comprises a filter for filtering particulate matter from exhaust gas emitted from the engine, which filter comprising a porous substrate having inlet and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a three-way catalyst washcoat comprising a plurality of solid particles wherein the porous structure of the washcoated porous substrate contains pores of a second mean pore size, which is less than the first mean pore size, and a three-way catalyst washcoat disposed on a separate substrate monolith located upstream of the filter, wherein a mass of three-way catalyst washcoat on the upstream substrate monolith is ≦75% of the total mass of three-way catalyst washcoat in the exhaust system. | 06-30-2011 |
20110182789 | EXHAUST GAS AFTERTREATMENT SYSTEM - An exhaust gas post treatment system for, in particular, a self-igniting internal combustion engine including a catalytic converter that is arranged in an exhaust gas line, a fine particle filter and an introduction device for a reduction agent arranged upstream of the catalytic converter in the direction of the flow of the exhaust gas, and to a method for operating said type of exhaust gas post treatment system. An exhaust gas post treatment system and a method for operating said type of system that is simple to use and compact. This is achieved by virtue of the fact that the catalytic converter is a reductively or oxidatively operated catalytic converter, or that the introduction device, the catalytic converter, that can be operated reductively or oxidatively, and the fine particle filter are arranged in said sequence and in the exhaust line in the direction of flow. | 07-28-2011 |
20110236280 | METHOD FOR PURIFYING EXHAUST GAS AND SYSTEM THEREFORE - A method is provided for purifying exhaust gas from an engine having an exhaust passage with a selective reducing catalyst and an oxidation catalyst upstream of the selective reducing catalyst. The method calculates an amount of NOx that flows into the selective reducing catalyst; sets an amount of an additive agent to be supplied to the selective reducing catalyst based on the calculated amount of NOx; determines a degradation degree of the oxidation catalyst; determines whether a correction to the amount of the additive agent is necessary based on the determined degradation degree of the oxidation catalyst; corrects the amount of the additive agent to be supplied when the correction is necessary; and supplies the additive agent to the selective reducing catalyst in the corrected amount if the amount is determined to be corrected and in the uncorrected amount if the amount is determined not to be corrected. | 09-29-2011 |
20110243818 | TEMPERATURE CONTROL CIRCUIT FOR SCR UREA SYSTEM - A system may include a urea injection device, first, second and third conduits and a valve. The first conduit may contain a fluid and may be in heat transfer relation with the urea injection device. The second conduit may be in selective fluid communication with the first conduit. The third conduit may be in selective fluid communication with the first conduit and in heat transfer relation with a heat source. The valve may be connected to the first, second and third conduits and may be movable between first and second positions. The first position may allow fluid communication between the first and third conduits and restrict communication between the first and second conduits. The second position may allow fluid communication between the first and second conduits and restrict fluid communication between the first and third conduits. | 10-06-2011 |
20110305612 | NOX STORAGE CATALYST WITH IMPROVED HYDROCARBON CONVERSION ACTIVITY - Described is a nitrogen oxide storage catalyst comprising:
| 12-15-2011 |
20120003131 | INTEGRATED DIESEL PARTICULATE FILTER AND ELECTRIC LOAD BANK - An apparatus for dissipating energy into the exhaust gas of an internal combustion engine includes a container for confining a flow path for exhaust gas from an internal combustion engine where the container has an inlet and an outlet. A porous, electrically conductive mesh is placed in the container such that exhaust gas can flow through the conductive mesh. At least two electrical terminals are in permanent electrical contact with the conductive mesh. An electrical power supply completes an electrical circuit through the conductive mesh with the power supply having two or more electrical outputs electrically connected to an equal number of electrical terminals on the conductive mesh. The apparatus provides a filter, heater, electrical load and silencer. | 01-05-2012 |
20120020857 | DOSING SYSTEM HAVING RECIRCULATION HEATING AND VACUUM DRAINING - A reductant dosing system is disclosed. The reductant dosing system may have a supply of reductant, a reductant nozzle, and a pump with an inlet and an outlet. The reductant dosing system may also have a first passage connecting the supply with the inlet of the pump, and a first control valve disposed in the first passage. The reductant dosing system may further have a second passage connecting the outlet of the pump with the reductant nozzle, and a second control valve disposed in the second passage. The reductant dosing system may additionally have a third passage connecting the second control valve to the first passage at a location downstream of the first control valve, and a fourth passage connecting the second control valve with the supply. | 01-26-2012 |
20120039779 | METHOD FOR FEEDING REDUCING AGENT INTO AN EXHAUST GAS SYSTEM AND CORRESPONDING EXHAUST GAS SYSTEM AND MOTOR VEHICLE - A method for feeding reducing agent or reducing agent precursor into exhaust systems of mobile internal combustion engines and an exhaust system are preferably used for internal combustion engines with high nitrogen oxide compound emissions. A feed time is established. An exhaust parameter and/or necessary quantity of reducing agent is determined and a feed state of the reducing agent is defined. The reducing agent is treated if the feed state does not correspond to a stored state. The reducing agent feed to the exhaust system takes place last. The steps are repeated multiple times. This permits reducing agent to be fed into an exhaust system in a state suitable for the exhaust temperature, so that complete conversion of reducing agent takes place and selectively catalytic reduction is also ensured. This reduces the quantity of electrical energy necessary for converting reducing agent. A motor vehicle having the system is also provided. | 02-16-2012 |
20120045378 | METHOD AND DEVICES FOR HEATING UREA-CONTAINING MATERIALS IN VEHICLE EMISSION CONTROL SYSTEM - The invention relates to systems and methods for heating a solid or liquid reducing material such as an urea-containing material for NO | 02-23-2012 |
20120107202 | PROCESS FOR MINIMISING THE EMISSION OF PARTICULAR MATTER FROM MARINE DIESEL ENGINES - The present invention provides a process for minimizing the emission of particulate matter and precursors thereof from a flue gas stream of an engine comprising particulate matter and precursors thereof and at least one gaseous component, which process comprises the steps of: a. Obtaining a flue gas stream of an engine comprising particulate matter and precursors thereof; b. Increasing the moisture content of the stream by contacting the same with a first aqueous medium in an amount and at a temperature at which at least 50% of the water content of the first aqueous medium is evaporated; whereby a moisture laden gas stream, optionally containing suspension droplets, is formed; c. Cooling the moisture laden gas stream whereby suspension droplets are formed; and d. Applying a centrifugal force to the moisture laden gas stream and to the suspension droplets to effect the swirling thereof; whereby a treated gaseous stream and an aqueous stream are formed; and wherein the content of particulate matter in the treated gaseous stream is reduced by at least 50% compared with that in the hot gas stream as measured by cooling to about 50° C. with no further treatment and wherein the centrifugal force in step d is characterized in that the velocity of the moisture laden gas stream is between 20 m/sec and 120 m/sec. | 05-03-2012 |
20120141344 | Flow-Through Structure with Active Ingredients - The present disclosure describes systems and methods for making an active bed for use in catalyst, filter or other chemical processing systems. A fluidic substrate material is combined with one or more active ingredients while in the fluid or substantially plasticized state. Acoustic energy is applied to the fluidic substrate and active ingredient mixture, and static pressure is applied as well. The pressure is released and the mixture is allowed to form porous fluid-permeable structures (sometimes a lattice) through which a fluid to be processed can be passed. | 06-07-2012 |
20120148464 | EXHAUST-GAS AFTERTREATMENT SYSTEM WITH CATALYTICALLY ACTIVE WALL-FLOW FILTER WITH STORAGE FUNCTION UPSTREAM OF CATALYTIC CONVERTER WITH IDENTICAL STORAGE FUNCTION - The present invention relates to an exhaust-gas aftertreatment system which comprises a preferably catalytically active particle filter (wall-flow filter) which is followed in turn by a throughflow monolith (flow-through monolith) which is preferably provided with a catalytically active function. Both components have the same storage functions for gaseous substances present in the exhaust gas of internal combustion engines. The system is suitable in particular for the simultaneous removal of particles and pollutants from the exhaust gas of both predominantly lean-operated internal combustion engines and also of internal combustion engines operated predominantly with a stoichiometric air/fuel mixture. Likewise described is a process for the production and the use of such a system for exhaust-gas aftertreatment. | 06-14-2012 |
20120183459 | APPARATUS, SYSTEM, AND METHOD FOR FILTRATION OF A DOSING FLUID IN AN EXHAUST AFTERTREATMENT SYSTEM - An apparatus, system, and method are disclosed for a filter for filtering a dosing fluid in an exhaust aftertreatment system. The filter may comprise a dosing tank configured to contain a dosing fluid, a filter media disposed within the dosing tank, and a support structure supporting the filter media to form a pathway for a flow of dosing fluid. Beneficially, the apparatus, system, and method of the present invention reduce the cost of operation and manufacture of the SCR system. | 07-19-2012 |
20120258030 | GAS SEPARATION AND RECOVERY APPARATUS AND GAS SEPARATION AND RECOVERY METHOD - A gas separation and recovery apparatus that separates and recovers nitrogen oxides from a gas mixture includes: a liquid storing portion that stores a liquid, the liquid absorbing the nitrogen oxides; a gas-liquid contacting portion in which the liquid and the gas mixture contact with each other; and a liquid recovering portion that recovers the liquid after the liquid contacts the gas mixture. The liquid is an ionic liquid that chemically absorbs the nitrogen oxides. | 10-11-2012 |
20120263632 | METHOD FOR DOSING AN UREA BASED REDUCING AGENT INTO A GAS EXHAUST STREAM - The present invention provides for a method for dosing an urea-based reducing agent into a exhaust gas stream generated from a combustion engine and addressed to an aftertreatment system, e.g. SCR or SCRT system. According to the method of the invention the gas exhaust stream is conveyed into a dosing housing which develops along a longitudinal axis. In particular the gas is conveyed by generating an annular inlet jet inclined with respect of said axis. The urea-based reducing agent is injected by generating, inside the housing, an urea-based reducing agent spray which is preferably coaxial to said axis of the housing. | 10-18-2012 |
20120269705 | SYSTEM FOR SELECTIVE CATALYST REDUCTION - The invention relates to a system and method for selective catalyst reduction (SCR), where the addition of reducing agent is administered by a control portion and injected into a gas by an injection portion upstream of a catalyst portion. In some embodiments of the invention the injection portion comprises a plurality of injection nozzles. | 10-25-2012 |
20120269706 | Reduction of Particulate, NOx, and Ammonia Emissions - A method for controlling emissions from an engine includes reducing trapped nitrogen oxides to ammonia on an LNT catalyst while concurrently oxidizing soot accumulated on the LNT catalyst, and, flowing the ammonia so formed to an SCR catalyst. | 10-25-2012 |
20120282159 | EXHAUST GAS PURIFICATION APPARATUS AND METHOD FOR ENGINE AND FILTER REGENERATION SYSTEM OF THE EXHAUST GAS PURIFICATION APPARATUS - An exhaust gas purification apparatus for an engine is provided with a filter arranged in an exhaust passage of the engine, and a regeneration control unit for regenerating the filter by burning the particulate matters accumulated in the filter. The control unit may include an over-accumulation state determination unit and a switch. The over-accumulation state determination unit determines over-accumulation of the particulate filter in the filter when the particulate matter is over-accumulated in the filter. The switch switches a regeneration temperature for regenerating the filter between a first regeneration temperature at which a normal regeneration is performed and a second regeneration temperature which is lower than the first regeneration temperature. The control unit is connectable to a command unit when the particular matter is over-accumulated in the filter, so that the switch is forcibly operated toward the second regeneration temperature. | 11-08-2012 |
20120308455 | DEVICE HAVING AN INJECTOR FOR A LIQUID REDUCING AGENT, CONFIGURATION HAVING THE DEVICE AND METHODS OF USING THE DEVICE AND THE CONFIGURATION - A device includes an injector for a liquid having at least one pressure sensor, preferably an integrated pressure sensor. The device is used, in particular, for adding liquid reducing agent to an exhaust gas line of a motor vehicle. A configuration having the device and methods of using the device and the configuration are also provided. | 12-06-2012 |
20120321537 | COATING METHOD AND DEVICE - The invention relates to a novel coating device, the method carried out using said device, products obtained thereby, and use of said products. | 12-20-2012 |
20130011313 | Exhaust Gas Aftertreatment Installation and Method - An exhaust gas aftertreatment installment and associated exhaust gas aftertreatment method utilizes a nitrogen oxide storage catalytic converter and an SCR catalytic converter. A particulate filter is provided upstream of the nitrogen oxide storage catalytic converter or between the latter and the SCR catalytic converter or downstream of the SCR catalytic converter. The time of regeneration operating phases of the nitrogen oxide storage catalytic converter can be determined as a function of the nitrogen oxide content of the exhaust gas downstream of the nitrogen oxide storage catalytic converter or of the SCR catalytic converter and/or as a function of the ammonia loading of the latter. Moreover, a desired ammonia generation quantity can be determined for a respective regeneration operating phase. The installation and method are adopted for use for motor vehicle internal combustion engines and other engines which are operated predominantly in lean-burn mode. | 01-10-2013 |
20130017136 | EXHAUST GAS CONTROL APPARATUS AND METHOD FOR INTERNAL COMBUSTION ENGINEAANM Hirota; ShinyaAACI Susono-shiAACO JPAAGP Hirota; Shinya Susono-shi JPAANM Yamashita; YoshinoriAACI Kakegawa-shiAACO JPAAGP Yamashita; Yoshinori Kakegawa-shi JP - A NOx selective reduction catalyst for reducing NOx by the ammonia adsorbed is disposed in an engine exhaust gas passage. As states of adsorption of ammonia by the catalyst, there are a first adsorption state of ammonia that occurs when the ammonia is adsorbed during low temperature and a second adsorption state of ammonia that occurs when the ammonia is adsorbed or has already been adsorbed during high temperature. The amount of adsorbed ammonia in the first state is restricted to control concentration of the ammonia that is in the first state and desorbed when the temperature of the catalyst increases so as to be not higher than an allowable concentration, and that in the second state is restricted to control concentration of the ammonia that is in the second state and desorbed when the temperature of the catalyst increases so as to be not higher than an allowable concentration. | 01-17-2013 |
20130028817 | DIESEL EXHAUST FLUID FORMULATION HAVING A HIGH AMMONIUM CONTENT AND A LOW FREEZING POINT - A mixture of urea, water and ammonium carbamate is formulated for use in the catalytic reduction of oxides of nitrogen in diesel exhaust. The mixtures may be formulated to optimize the amount of reductant in the mixture and the freezing point of the formulation. These formulations are especially useful in combination with Selective Catalytic Reduction systems and are well suited for use on heavy-duty trucks and heavy duty equipment used off-road. Some of these formations include between about 15.0 wt. % to about 40.0 wt. % urea; between about 15.0 wt. % to about 40.0 wt. % ammonium carbamate; and between about 40.0 wt. % to about 60.0 wt. % water. The formulation may be monitored for ammonia content and/or freezing point and the composition of the formulation may be adjusted to optimize the freezing point and ammonia content. | 01-31-2013 |
20130028818 | METHOD OF DEPLETING NITROUS OXIDE IN EXHAUST GAS AFTER-TREATMENT FOR LEAN-BURN ENGINES - The present invention relates to a method for exhaust gas after-treatment for essentially lean-burn internal combustion engines and also a corresponding advantageous exhaust gas after-treatment system. In particular, the present invention relates to reducing the proportion of the greenhouse gas N20 in the total exhaust gas from a corresponding internal combustion system using at least one NOx storage catalyst as exhaust gas purification element. The objective of the invention is to operate the N20 depletion catalyst located downstream of the NOx storage catalyst under lambda=<1 conditions when the N20 formed by the NOx storage catalyst reaches the N20 depletion catalyst. | 01-31-2013 |
20130028819 | CATALYTIC CONVERTER APPARATUS - A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters. | 01-31-2013 |
20130045148 | Flow Modulating Substrates For Early Light-Off - An exhaust gas after-treatment system includes at least first and second substrates. The first substrate has a first region and a second region circumferentially surrounding the first region. The first region of the first substrate has a higher average cell density than the average cell density of the second substrate. The system can also include at least a third substrate. | 02-21-2013 |
20130052107 | EXHAUST GAS PURIFICATION APPARATUS OF AN INTERNAL COMBUSTION ENGINE - A technique that, in an exhaust gas purification apparatus of an internal combustion engine, can avoid a decrease in a NOx purification rate by adding a reducing agent as continuously as possible, while avoiding NH | 02-28-2013 |
20130064744 | HEATED INJECTION SYSTEM FOR DIESEL ENGINE EXHAUST SYSTEMS - Embodiments for injecting reducing agents are provided. In one example, an injection device for feeding reducing agents into an exhaust-gas purification system of an internal combustion engine for reduction of nitrogen oxide emissions comprises an injector, and an evaporation device for evaporating first and second reducing agents, the injection device connected to in each case one storage vessel for the first reducing agent and a storage vessel for the second reducing agent, the first and second reducing agents liquid at room temperature. | 03-14-2013 |
20130101485 | METHOD FOR CONTROLLING AN INJECTION DEVICE FOR FEEDING AN AMMONIA-RELEASING REDUCING AGENT INTO AN EXHAUST-GAS PURIFICATION SYSTEM OF AN INTERNAL COMBUSTION ENGINE - The present disclosure relates to a method for controlling an injection device for feeding an ammonia-releasing reducing agent into an exhaust-gas purification system of an internal combustion engine for the purpose of reducing the nitrogen oxide emissions, wherein the exhaust-gas purification system comprises at least one SCR catalytic converter with n cells which are arranged in series in the exhaust-gas throughflow direction and in which ammonia can be stored. | 04-25-2013 |
20130108528 | DIFFERENTIAL NH3 AND NOX MEASUREMENT USING AN EXHAUST GAS SENSOR COUPLED WITH A MICRO SCR CATALYST | 05-02-2013 |
20130108529 | EXHAUST GAS CONTROL APPARATUS AND REDUCTANT DISPENSING METHOD FOR INTERNAL COMBUSTION ENGINE | 05-02-2013 |
20130115150 | SCR CATALYST SYSTEM AND METHOD FOR THE OPERATION THEREOF - A SCR catalyst system, comprising a first SCR catalyst ( | 05-09-2013 |
20130115151 | PROCESS FOR THE REMOVAL OF ACID GASES FROM THE AIR AND FROM COMBUSTION GASES FROM BURNERS AND INTERNAL COMBUSTION ENGINES BY MEANS OF ABSORPTION WITH SODIUM HYDROXIDE SOLUTION AND PROCESS FOR OBTAINING SODIUM CARBONATE IN ORDER TO ACQUIRE CARBON CREDITS - The present invention consists of an absorption process with a chemical reaction to capture acid gases such as carbon dioxide, sulphur dioxide and nitrogen dioxide from the ambient air and from combustion gases from burners and internal combustion engines using fossil fuels; the aim of the invention being the acquisition of carbon credits in accordance with the “Kyoto protocol on climate change”. The process is carried out in a horizontal spray absorber using an 8% solution of sodium hydroxide as absorption liquid, obtaining sodium carbonate, sodium sulphite, sodium nitrite and nitrate as byproducts. These byproducts are converted into commercial products such as calcium carbonate, barium sulphate and ammonium nitrate; for which purpose both the sodium sulphite and the sodium nitrite must previously be converted into sodium sulphate and nitrate by means of an oxidizing agent. | 05-09-2013 |
20130115152 | CONTROL METHOD AND ARRANGEMENT FOR SELECTIVE CATALYTIC REDUCTION - A method for controlling a selective catalytic reduction system (SCR) exploiting a set of predetermined trigger events ( | 05-09-2013 |
20130121901 | ARRANGEMENT AND METHOD FOR CONTROLLING THE QUANTITY OF A REDUCTANT INTRODUCED INTO AN EXHAUST LINE OF AN INTERNAL COMBUSTION ENGINE - An arrangement for controlling injection of a reducing agent in an exhaust line of a combustion engine ( | 05-16-2013 |
20130136675 | Apparatus and method for purifying exhaust gases for combustion engines - An engine exhaust gas purification device comprising control unit having successively arranged switching device ( | 05-30-2013 |
20130171050 | SYSTEM AND METHOD FOR INJECTING AMMONIA INTO AN EXHAUST GAS STREAM - A method for injecting ammonia into an exhaust gas stream downstream of a diesel engine includes providing an exhaust gas passageway ( | 07-04-2013 |
20130202506 | METHOD FOR MONITORING AN SCR CATALYST - In a method for monitoring an SCR catalyst, in particular for monitoring the storage capacity of the SCR catalyst for ammonia, superstoichiometric metering ( | 08-08-2013 |
20130216459 | LOWER TEMPERATURE MIXING ZONE FOR NH3 - A method fluidly coupling components of an exhaust gas treatment system to an exhaust gas system, then injecting gaseous ammonia into the gas treatment system, beginning reaction of gaseous ammonia with exhaust gas at a temperature of less than about 180° C., preferably about 150° C., and then continuing reaction of gaseous ammonia with exhaust gas during operation of the vehicle, is disclosed. The gas treatment system includes a mixing chamber for reacting gaseous ammonia with exhaust gas to reduce NO | 08-22-2013 |
20130259778 | METHOD FOR USE IN CONNECTION WITH AN EXHAUST GAS POST-TREATMENT SYSTEM - A method for use with an exhaust gas post-treatment system on an internal combustion engine operated with aft surplus includes reducing nitrous oxides in that an ammonia-separating reducing agent is added to the exhaust gas flow upstream of a catalyst which is charged with a catalyst material for selective catalytic reduction of nitrous oxides. The method further provides that the NH | 10-03-2013 |
20130287656 | SYSTEM INTENDED TO REDUCE THE AMOUNT OF NOX IN THE EXHAUST GASES OF A MOTOR VEHICLE - The invention relates to a system intended to reduce the amount of NOx in the exhaust gases of a motor vehicle. The system comprises a storage space ( | 10-31-2013 |
20130287657 | Exhaust Gas Catalytic Converter System And Method For Operating An Exhaust Gas Catalytic Converter - A method is disclosed for operating an exhaust gas catalytic converter designed to reduce nitrogen oxides in an exhaust gas flow using a solution that contains urea and that reacts to form at least ammonia in the exhaust gas flow. The method may include: introducing an amount of the solution containing urea upstream of the exhaust gas catalytic converter until an ammonia slip through the exhaust gas catalytic converter; determining a first actual value of the loading state of the catalytic converter with ammonia at the time of the slip; determining a first estimated value of the loading state at the time of the slip by means of a dynamic model for the loading; subsequently draining the ammonia from the catalytic converter; determining a second actual value of the loading state of the exhaust gas catalytic converter with the solution containing urea when the catalytic converter is drained as specified. | 10-31-2013 |
20130302232 | METHODS AND SYSTEMS FOR AN ENGINE EMISSION CONTROL SYSTEM - Systems and methods are provided for a layered emission control device coupled to an exhaust manifold. Various formulations may be incorporated in a plurality of layers of the device to enable various emission control functions to be grouped within spatial constraints. For example, a first layer may include a first, oxidizing catalyst, a second layer may include a HC trap, and a third layer may include a second, different oxidizing catalyst, the second layer positioned between the first and third layers. The layers may be organized to reduce functional interference and improve functional synergy between the various emission control functions. | 11-14-2013 |
20130336862 | VARIABLE EXHAUST GAS AFTERTREATMENT SYSTEM - Systems and method for adjusting a cone angle of injected reductant directed into an engine exhaust upstream of a catalytic device based on the temperature distribution within the catalytic device are disclosed. In one particular example, a dosing unit comprising an adjustable piston is described whose adjustment further controls the distribution and amount of reaction fluid delivered therefrom. In this way, the fluid flow shape may be controlled to achieve a more optimal exhaust gas conversion based on the prevailing conditions within the exhaust gas system. | 12-19-2013 |
20140030175 | METHOD OF OPERATING A SELECTIVE CATALYTIC REDUCTION (SCR) ASSEMBLY, AND ASSEMBLY THEREFOR - A selective catalytic reduction (SCR) assembly, and method of operating the assembly, is described. In one example, the SCR assembly includes an SCR line, a flow restrictor, and a pressure sensor. The SCR line carries a reducing agent such as urea, and the flow restrictor is located in the SCR line. The pressure sensor senses the pressure of the reducing agent flowing through the SCR line, and the sensed pressure can be used to do one or more of the following: i) monitor the functionality of the SCR injector, ii) as one or more bases for controlling operation of an SCR fluid pump, and/or iii) determine a volume or volumetric flow rate of reducing agent that is ejected into an exhaust stream. | 01-30-2014 |
20140037523 | ZEOLITE CATALYST CONTAINING METAL - A catalyst composition is provided having a zeolite material of a CHA crystal structure and a silica to alumina mole ratio (SAR) of about 10 to about 25 and preferably having a mean crystal size of at least 1.0 microns; and a non-aluminum base metal (M), wherein said zeolite material contains said base metal in a base metal to aluminum ratio (M:Al) of about 0.10 to about 0.24. | 02-06-2014 |
20140044625 | HYDROCARBON TRAP HAVING IMPROVED ADSORPTION CAPACITY - A hydrocarbon trap is provided for reducing cold-start hydrocarbon emissions. The trap is formed by extruding from about 60 to 80% by weight zeolite and from about 20 to 40% by weight of a binder to form an extruded zeolite monolith. A three-way catalyst and an oxygen storage capacity material may also be included in the trap. The hydrocarbon trap contains from about 5.0 to 8.0 g/in. | 02-13-2014 |
20140044626 | FILTER SUBSTRATE COMPRISING THREE-WAY CATALYST - A catalysed filter for a positive ignition internal combustion engine comprises a porous filtering substrate having a total substrate length coated with a three-way catalyst washcoat composition comprising at least one precious metal selected from the group consisting of rhodium and one or both of platinum and palladium supported on a high surface area oxide, and an oxygen storage component, which composition being axially shared by a first zone comprising inlet surfaces of a first substrate lengthsecond zone; and a total precious metal loading in the first zone>second zone. | 02-13-2014 |
20140044627 | Preparation of Diesel Oxidation Catalyst Via Deposition of Colloidal Nanoparticles - The present invention relates to a process for preparing a catalyst, at least comprising the steps of adding a protecting agent to an aqueous solution of a metal precursor to give a mixture (M1), adding a reducing agent to mixture (M1) to give a mixture (M2), adding a support material to mixture (M2) to give a mixture (M3), adjusting the pH of mixture (M3), and separating the solid and liquid phase of mixture (M3). Furthermore, the present invention relates to the catalyst as such and its use as diesel oxidation catalyst. | 02-13-2014 |
20140050642 | METHOD AND DEVICE FOR MONITORING A REDUCING AGENT SOLUTION COMPOSITION IN THE EXHAUST GAS SYSTEM OF AN INTERNAL COMBUSTION ENGINE - A method for monitoring a reducing agent solution composition in an exhaust gas system of an internal combustion engine with metered injection of the reducing agent solution upstream of an SCR catalytic converter comprises metering injection of the reducing agent solution into the exhaust gas stream, determining a measured variable of a change in water content in the exhaust gas stream in response to the injected reducing agent solution, and determining at least one indicator value of a composition of the reducing agent solution at least based on the determined measured variable. In this way, deviations from the standard composition may be taken into account during metering or be displayed as an error. | 02-20-2014 |
20140056788 | METHOD FOR THE MODEL-BASED FEEDBACK CONTROL OF AN SCR SYSTEM HAVING AT LEAST ONE SCR CATALYTIC CONVERTER - A method for a model-based feedback control of an SCR system having at least one SCR catalytic converter. An SCR catalytic converter model of the SCR catalytic converter is used to control an injection of a reductant upstream of the SCR catalytic converter. In the SCR catalytic converter model, at least one reduction rate based on an Arrhenius approach and/or an SCR efficiency of at least one relevant reaction in the SCR catalytic converter is calculated. Deviations between a real system behavior and a simulated system behavior are adjusted using adaptation logic. In order to minimize the deviations between the model and the real system behavior and to achieve enhanced control accuracy, at least one adjustment parameter is used in the calculation of at least one reaction rate and/or the SCR efficiency, the adjustment parameter taking into consideration deviations between the real system behavior and the simulated system behavior. | 02-27-2014 |
20140056789 | DENOX OF DIESEL ENGINE EXHAUST GASES USING A TEMPERATURE-CONTROLLED PRECATALYST FOR PROVIDING NO2 IN ACCORDANCE WITH THE REQUIREMENTS - A process which solves the problem of supplying NO | 02-27-2014 |
20140056790 | CONTROL TECHNIQUES FOR AN SCR AFTERTREATMENT SYSTEM - A method includes providing: a selective catalytic reduction (SCR) catalyst disposed in an exhaust gas stream of an internal combustion engine, a reagent injector operationally coupled to the exhaust gas stream at a position upstream of the SCR catalyst, and a NO | 02-27-2014 |
20140065041 | EMISSIONS AFTERTREATMENT COMPONENT RECOVERY SYSTEM AND METHOD - Methods and systems include an operation to interpret a face-plugging index and/or a reduction in an expected oxidation efficiency of an oxidation catalyst disposed in an internal combustion engine aftertreatment system, and in response to the face-plugging index or the reduction oxidation efficiency reaching a threshold value, an operation to provide a catalyst element reversal command. | 03-06-2014 |
20140072490 | EXTRUDED SCR FILTER - A wall-flow filter comprises a catalyst for converting oxides of nitrogen in the presence of a reducing agent, which wall-flow filter comprising an extruded solid body comprising: 10-95% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one metal, wherein: the at least one metal is present throughout the extruded solid body alone or in combination with: is also present in a higher concentration at a surface of the extruded solid body; is also carried in one or more coating layer(s) on a surface of the extruded solid body; or both. | 03-13-2014 |
20140072491 | CATALYTIC CONVERTER APPARATUS - A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters. | 03-13-2014 |
20140079610 | SYSTEM FOR SUPPLYING A LIQUID FOR A VEHICLE AND INTEGRATED PUMP/FILTER MODULE - A supply system for a liquid includes a liquid tank, a supply line, a pump, a filter, and a device that makes it possible to purge the line, pump, and filter. The supply system further includes a non-return device preventing liquid from entering into these elements once they have been purged. In this system, the pump, filter and non-return device are combined in a compact module. The filter at least partly surrounds the pump. The non-return device is an integral part of a common housing that surrounds the filter and at least one part of the pump. | 03-20-2014 |
20140093439 | FLOW DEVICE FOR AN EXHAUST SYSTEM - A flow device for an exhaust system includes a body that defines an interior cavity. An exhaust inlet passage is disposed in the interior cavity. An exhaust outlet passage is disposed in the interior cavity so that at least a portion of the exhaust inlet passage circumferentially surrounds at least a portion of the exhaust outlet passage. A doser is adapted to inject reductants into the interior cavity of the body such that the reductants are injected in the same general direction as the direction of flow of the exhaust gases. | 04-03-2014 |
20140099245 | PROCESS AND SYSTEM EMPLOYING PHASE-CHANGING ABSORBENTS AND MAGNETICALLY RESPONSIVE SORBENT PARTICLES FOR ON-BOARD RECOVERY OF CARBON DIOXIDE FROM MOBILE SOURCES - A method and system are described for the on-board treatment of a hydrocarbon-fueled internal combustion engine (ICE) exhaust gas stream to reduce CO | 04-10-2014 |
20140099246 | CATALYTIC CONVERTER APPARATUS - A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters. | 04-10-2014 |
20140105798 | Exhaust Gas Aftertreatment System And Method For Exhaust Gas Aftertreatment - An exhaust gas aftertreatment system for an internal combustion engine, particularly for a ship's diesel engine operated with heavy oil, has a SCR catalyst that uses ammonia as reductant. A nozzle is positioned upstream of the SCR catalyst viewed in flow direction of the exhaust gas. Using the nozzle, an aqueous urea solution is decomposed at a defined pressure and at a defined temperature to form water vapor, carbon dioxide and ammonia vapor such that ammonia evaporated by the nozzle is injected into the exhaust gas via the nozzle. | 04-17-2014 |
20140112850 | DEVICE HAVING AN ELECTRICALLY HEATABLE HONEYCOMB BODY AND METHOD FOR OPERATING THE HONEYCOMB BODY - A device for exhaust gas treatment in an exhaust system of an internal combustion engine, in particular in a motor vehicle, includes an electrically heatable honeycomb body through which an exhaust gas can flow. The honeycomb body is disposed in a casing tube and has at least one current-conducting structure with electric insulation for voltages greater than 24 V. A current-generating pulsed voltage is applied to the structure to heat the honeycomb body. It is thus possible for heating elements in the exhaust-gas flow to be powered by an on-board electrical system voltage of for example 48 V. A method for operating the honeycomb body is provided with which, even at operating voltages greater than 24 V, the generation of heat in the electrically heatable honeycomb body can be kept in a desired range by adjustment of a pulse width and/or repetition frequency of the pulsed voltage. | 04-24-2014 |
20140112851 | SUPPLEMENTAL AMMONIA STORAGE AND DELIVERY SYSTEM - An exhaust after-treatment system is described. Generally speaking, the system includes separate primary and secondary NO | 04-24-2014 |
20140120014 | Device for the Purification of Exhaust Gases from a Heat Engine, Comprising a Ceramic Carrier and an Active Phase Chemically and Mechanically Anchored in the Carrier - Device for the purification of exhaust gases from a thermal combustion engine comprising: | 05-01-2014 |
20140127097 | AMMONIA FLOW CONTROL - A method for controlling injection of a reductant into an exhaust system of an internal combustion engine includes determining the temperature and pressure of reductant supplied to a reductant injector. The method also determines a maximum reductant flow rate as a function of the reductant temperature and pressure and controls operation of the injector as a function of the maximum reductant flow rate. | 05-08-2014 |
20140127098 | Ammonia Slip Reduction - A method for controlling injection of a reductant into an exhaust system of an internal combustion engine, which includes measuring temperature at a plurality of locations in the exhaust system relative to an SCR catalyst, determining an average temperature as a function of the measured temperatures, and controlling injecting of a reductant into the exhaust upstream of the catalyst as a function of the average temperature. The average temperature may be a weighted average where temperature measurements from at least some locations upstream of the SCR catalyst may be assigned greater weight than temperature measurements proximate the SCR catalyst. | 05-08-2014 |
20140127099 | Device for Purifying Exhaust Gases from a Heat Engine, Comprising a Catalytic Ceramic Support Comprising an Arrangement of Essentially Identical Crystallites - Device for purifying exhaust gases from a thermal combustion engine, comprising a catalytic ceramic carrier comprising an arrangement of crystallites of the same size, same isodiametric morphology and same chemical composition or substantially the same size, same isodiametric morphology and same chemical composition, wherein each crystallite is in contact at a singular or almost singular point with surrounding crystallites, and whereon at least one active phase is deposited for the chemical destruction of impurities in the exhaust gas. | 05-08-2014 |
20140127100 | METHOD FOR THE PRODUCTION OF AMMONIA FROM AN AMMONIA PRECURSOR SUBSTANCE IN ORDER TO REDUCE NITROGEN OXIDES IN EXHAUST GASES - The present invention relates to a method for generating ammonia from an ammonia precursor substance and to the use thereof for reducing nitrogen oxides in exhaust from industrial facilities, from combustion engines, from gas engines, from diesel engines or from petrol engines. | 05-08-2014 |
20140140909 | THREE-WAY CATALYTIC CONVERTER USING NANOPARTICLES - The present disclosure relates to a substrate comprising nanomaterials for treatment of gases, washcoats for use in preparing such a substrate, and methods of preparation of the nanomaterials and the substrate comprising the nanomaterials. More specifically, the present disclosure relates to a substrate comprising nanomaterial for three-way catalytic converters for treatment of exhaust gases. | 05-22-2014 |
20140147355 | METHOD FOR OPERATING AN EXHAUST GAS AFTERTREATMENT SYSTEM WITH AT LEAST ONE FIRST SCR DEVICE AND AT LEAST ONE SECOND SCR DEVICE - A method for operating an exhaust gas aftertreatment system is provided that comprises at least one first SCR device and at least one second SCR device. Furthermore, a dosing device for reactant for supplying the SCR devices is provided upstream of the first SCR device in the exhaust gas flow direction. In one embodiment, a target overall efficiency η | 05-29-2014 |
20140147356 | AMMONIA GAS GENERATOR AND METHOD FOR PRODUCING AMMONIA IN ORDER TO REDUCE NITROGEN OXIDES IN EXHAUST GASES - The invention relates to an ammonia gas generator for producing ammonia from an ammonia precursor substance as well as the use thereof in exhaust aftertreatment systems. The invention further relates to a method for producing ammonia gas to reduce nitrogen oxides in exhaust gases, in particular combustion gases from internal combustion engines such as diesel engines. | 05-29-2014 |
20140154159 | Engine Exhaust Aftertreatment Component Including Aftertreatment Brick Module - An engine exhaust aftertreatment component includes a housing defining an exhaust flow path from an exhaust inlet to an exhaust outlet. The housing supports an internal support channel. An aftertreatment brick module includes a catalytic brick, a can configured to receive the catalytic brick, and an end plate disposed along an end of the can. The end plate includes a coupling mechanism configured to be received within the internal support channel. | 06-05-2014 |
20140161693 | CATALYSED SOOT FILTER - A catalysed soot filter for a diesel engine comprises a wall flow substrate having a substrate axial length, wherein surfaces of both the internal walls of a plurality of inlet and a plurality of outlet channels comprise a catalytic washcoat of at least one on-wall coating composition for oxidising NO in exhaust gas to NO | 06-12-2014 |
20140170042 | LNT CONTROL METHOD FOR VEHICLE - An LNT (Lean NOx Trap) control method for vehicles increases a purification rate of NOx while preventing an increase in the amount of slip of separated NOx at a relatively low LNT temperature. The method includes a recycle necessity determining step that determines whether to recycle NOx of a LNT in accordance with an amount of adsorbed NOx, a LNT temperature determining step that determines whether a temperature of the LNT is below a predetermined reference temperature, a rich performing step that performs a rich mode when the temperature of the LNT is equal to the reference temperature or above and a pre-rich step that ejects fuel in a rich state when the temperature of the LNT is below the reference temperature. | 06-19-2014 |
20140193318 | Reductant Decomposition System - Described herein are various embodiments of a reductant decomposition system. According to one representative embodiment, the reductant decomposition system includes an exhaust gas chamber including an inlet and outlet. The system also includes a first exhaust gas distribution component positioned within the chamber and communicable in exhaust gas receiving communication with the outlet. The first exhaust gas distribution component causes swirling exhaust gas flow patterns within the exhaust gas chamber. Additionally, the system includes a second exhaust gas distribution component positioned within the chamber and communicable in exhaust gas providing communication with the inlet. The second exhaust gas distribution component includes features that cause a swirling exhaust gas flow pattern within a space defined by the second exhaust gas distribution component. Further, the system includes a reductant injector coupled to the exhaust gas chamber. The reductant injector is communicable in reductant injecting communication with exhaust gas within the chamber. | 07-10-2014 |
20140199218 | METHOD AND APPARATUS FOR ZERO EMISSION COMBINED HEAT AND POWER - An emissions control system and method of controlling emissions reduces contaminants in exhaust gases. The emissions control system may be a combined power and heat system which may include an organic Rankine cycle drive for producing electricity. The system may use ozone, a wet scrubber and a charcoal bed to reduce the contaminants. | 07-17-2014 |
20140199219 | Method For Determining a Quality of a Reducing Agent Solution Containing Ammonia Used to Reduce Nitrite Oxide - A determination of a quality of a reducing agent solution containing ammonia used to reduce nitrogen oxides involves actuating a metering unit that delivers metered quantities of reducing agent solution into an engine's discharged exhaust gas and determining an efficiency value that is at least correlated with the efficiency of the SCR catalytic converter and comparing the efficiency value to a predefinable limit value. If an efficiency value not corresponding to proper functioning of the SCR exhaust emission control system is identified by the comparison, a switch is made to a diagnostic mode in a second method step. If a predefinable deviation of the efficiency value from a limit value is identified after expiration of the second method step time period, a third method step is performed for conditioning the SCR catalytic converter. A fourth step involves an adaptation mode in which a deviation from the efficiency value is determined. | 07-17-2014 |
20140219896 | HEAT GENERATION SYSTEM FOR DETERMINING A SELECTIVE CATALYTIC REDUCTION DEVICE EFFICIENCY - A control method and system for monitoring a selective catalytic reduction (“SCR”) device of an exhaust gas treatment system is disclosed. The method includes monitoring a plurality of operating conditions related to determining an efficiency of the SCR device and a SCR temperature. The method includes determining if each of the operating conditions are within a respective predetermined range and if the SCR temperature is below an operating temperature range. The method includes activating a hydrocarbon supply based on if each of the operating conditions are within the respective predetermined range and if the SCR temperature is below the operating temperature range. The hydrocarbon supply is located upstream of the SCR device to generate heat if activated. The method includes monitoring the SCR temperature to determine if the SCR device is operating within the operating temperature range. | 08-07-2014 |
20140219897 | METHOD AND APPARATUS FOR ANALYSIS AND SELECTIVE CATALYTIC REDUCTION OF NOX-CONTAINING GAS STREAMS - An apparatus and method for measuring and controlling the NO | 08-07-2014 |
20140234188 | APPARATUS AND METHOD FOR FILTERING ENGINE EXHAUST GASES - Embodiments of the invention provide an engine aftertreatment apparatus comprising first and second diesel particulate filters (DPFs), the first DPF being provided upstream of the second DPF, the second DPF being provided with a coating of a second DPF catalyst, the second DPF catalyst being arranged to promote reduction of NOx. | 08-21-2014 |
20140241963 | COLD START STARTUP UNIT FOR UREA-BASED SYSTEMS - An exhaust after-treatment system is described. Generally speaking, the system includes separate primary and secondary NOx reducing systems for delivering reductant to an exhaust stream, a sensor system for determining relevant operating conditions and an electronic control module for activating the reducing systems. Methods for reducing NOx in an exhaust stream are also described. Generally speaking, the methods include the steps of determining a need for NOx reduction in an exhaust stream, determining exhaust temperature, determining ambient temperature, and injecting at least one of a primary reductant and a secondary reductant into the exhaust stream based on the determined temperature. The system and method are particularly useful during cold start conditions, as well as lightly loaded application in conditions where the ambient temperature is below 45 F where the SCR catalyst may not fully function. | 08-28-2014 |
20140248200 | Emissions Treatment System with Ammonia-Generating and SCR Catalysts - Provided are emissions treatment systems for an exhaust stream having an ammonia-generating component, such as a NOx storage reduction (NSR) catalyst or a lean NOx trap (LNT) catalyst, and an SCR catalyst disposed downstream of the ammonia-generating catalyst. The SCR catalyst can be a molecular sieve having the CHA crystal structure, for example SSZ-13 or SAPO-34, which can be ion-exchanged with copper. The LNT can be layered, having an undercoat washcoat layer comprising a support material, at least one precious metal, and at least one NOx sorbent selected from the group consisting of alkaline earth elements, rare earth elements, and combinations thereof and a top washcoat layer comprising a support material, at least one precious metal, and ceria in particulate form, the top washcoat layer being substantially free of alkaline earth components. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines. | 09-04-2014 |
20140248201 | SCRUBBER SYSTEM AND METHOD - The present invention relates to a method for removal of SO | 09-04-2014 |
20140255281 | System and Method for Exhaust Gas After Treatment - A hydrocarbon selective catalytic reduction (HC-SCR) catalyst is regenerated using a nitrogen-based reductant agent. The HC-SCR catalyst is in communication with a power system such as an internal combustion engine and receives exhaust gasses from the internal combustion engine. Sulfur in the exhaust gasses may deactivate the HC-SCR catalyst by sulfur oxides forming thereon. To remove the sulfur oxides, a nitrogen-based reductant agent is introduced to the exhaust gasses. The nitrogen-based reductant agent decomposes to nitrogen oxides and hydrogen. The hydrogen reacts with the sulfur oxides to form hydrogen sulfides thereby removing the sulfur oxides from the HC-SCR catalyst. | 09-11-2014 |
20140271422 | Selective Catalytic Reduction Catalyst System - Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher N | 09-18-2014 |
20140271423 | CATALYTIC REDUCTION OF NOX - A system for NO | 09-18-2014 |
20140271424 | APPARATUS AND METHOD FOR AFTER-TREATMENT OF EXHAUST EMISSION FROM DIESEL ENGINE - An apparatus ( | 09-18-2014 |
20140301923 | Selective Catalytic Reduction Catalyst System - Described are SCR catalyst systems comprising a first SCR catalyst composition and a second SCR catalyst composition arranged in the system, the first SCR catalyst composition promoting higher N | 10-09-2014 |
20140301924 | FILTER SUBSTRATE COMPRISING THREE-WAY CATALYST - A catalysed filter for filtering particulate matter from exhaust gas comprising one or more catalyst poisons and emitted from a positive ignition internal combustion engine, which filter comprising a porous substrate having a total substrate length and having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a washcoat comprising a plurality of solid particles, wherein the porous structure of the washcoated porous substrate contains pores of a second mean pore size, wherein the second mean pore size is less than the first mean pore size, which washcoat being axially arranged on the porous substrate as a first zone comprising the inlet surfaces of a first substrate length less than the total substrate length and a second zone comprising the outlet surfaces of a second substrate length less than the total substrate length, wherein the sum of the substrate length in the first zone and the substrate length in the second zone≧100%, wherein the washcoat of at least the second zone is a three-way catalyst washcoat comprising one or more precious metal supported on a high surface area oxide, and an oxygen storage component and wherein:
| 10-09-2014 |
20140301925 | ENHANCED REAL-TIME AMMONIA SLIP DETECTION - Systems and methods for detecting ammonia slip in an exhaust system based upon transient NOx sensor responses are described. In one example method, an exhaust system allocates tailpipe NOx sensor output to NOx and NH | 10-09-2014 |
20140308190 | METHOD FOR DETERMINING THE TRUE AMOUNT OF AN ACTIVE PRODUCT ENTERING A CATALYTIC DEVICE OF AN EXHAUST LINE OF A VEHICLE - Method for determining a true amount of active product entering a catalytic device of a vehicle exhaust line includes:
| 10-16-2014 |
20140314644 | REDUCTANT DELIVERY UNIT FOR AUTOMOTIVE SELECTIVE CATALYTIC REDUCTION WITH REDUCING AGENT HEATING - A reductant delivery unit for selective catalytic reduction (SCR) after-treatment for vehicles includes a solenoid operated fluid injector associated with an exhaust gas flow path upstream of a SCR catalytic converter. The fluid injector has a fluid inlet and a fluid outlet. The fluid inlet receiving a source of reducing agent and the fluid outlet communicating with the exhaust gas flow path so that the fluid injector controls injection of urea solution into the exhaust gas flow path. The fluid injector has an inlet tube for directing the reducing agent between the fluid inlet and the fluid outlet. A shield is fixed with respect to the fluid injector and surrounds at least portions of the fluid injector. A coil heater is integral with the fluid injector and is constructed and arranged, when energized, to inductively heat the inlet tube to thereby heat the reducing agent within the inlet tube. | 10-23-2014 |
20140314645 | SCR CATALYST AMMONIA SURFACE COVERAGE ESTIMATION AND CONTROL - Described herein are various embodiments of an apparatus, a system, and a methods for reducing NO | 10-23-2014 |
20140314646 | Method for Operating Exhaust Gas Purification Systems - The invention relates to a method for purifying exhaust gas in vehicles with internal combustion engines. The method is characterised in that exhaust gas coming from the engine ( | 10-23-2014 |
20140322112 | Positive Ignition Engine and Exhaust System Comprising Catalysed Zone-Coated Filter Substrate - A positive ignition engine comprising an exhaust system, which comprises a catalysed filter for filtering particulate matter from exhaust gas emitted from a positive ignition internal combustion engine, which filter comprising a porous substrate having a total substrate length and having inlet surfaces and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a first porous structure containing pores of a first mean pore size, wherein the porous substrate is coated with a washcoat composition which is a NOx absorber catalyst washcoat composition comprising at least one precious metal; or a selective catalytic reduction (SCR) catalyst washcoat composition, wherein a second porous structure of the washcoated porous substrate contains pores of a second mean pore size, wherein the second mean pore size is less than the first mean pore size, which NOx absorber catalyst washcoat or SCR catalyst washcoat being axially arranged on the porous substrate as a first zone comprising the inlet surfaces of a first substrate length less than the total substrate length and a second zone comprising the outlet surfaces of a second substrate length less than the total substrate length, wherein the sum of the substrate length in the first zone and the substrate length in the second zone is ≧100%, wherein:
| 10-30-2014 |
20140322113 | Filter Substrate Comprising Zone-Coated Catalyst Washcoat - A catalysed filter for filtering particulate matter from exhaust gas emitted from a positive ignition internal combustion engine comprises a ceramic porous wall-flow filter substrate having a total substrate length and having inlet channels defined in part by ceramic inlet wall surfaces and outlet channels defined in part by ceramic outlet wall surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a first porous structure containing pores of a first mean pore size, wherein the porous substrate is coated in part with a catalyst washcoat composition, wherein a second porous structure of a washcoated part of the porous substrate contains pores of a second mean pore size, wherein the second mean pore size is less than the first mean pore size, which catalyst washcoat composition being disposed in a first zone comprising the inlet surfaces of a first substrate length less than the total substrate length, wherein a second zone comprising the outlet surfaces of a second substrate length contains no washcoat and wherein the sum of the substrate length in the first zone and the substrate length in the second zone is >100%. | 10-30-2014 |
20140356265 | Catalyzed Filter for Treating Exhaust Gas - Provided is a diesel particulate filter capable of removing soot from an exhaust gas while operating at low backpressure, the filter comprising (a) a wall-flow filter substrate having a mean pore size, an inlet side, an outlet side, and a porous interior between the inlet and outlet sides; and (b) a catalyst composition coated from the outlet side of the substrate, wherein the catalyst composition has a d | 12-04-2014 |
20140356266 | Catalyzed Filter for Treating Exhaust Gas - Provided is a diesel particulate filter capable of removing soot from an exhaust gas while operating at low backpressure, the filter comprising (a) a wall-flow filter substrate having a mean pore size, an inlet side, an outlet side, and a porous interior between the inlet and outlet sides; and (b) a catalyst composition coated from the inlet side of the substrate, wherein the catalyst composition has a d | 12-04-2014 |
20140363357 | SYSTEMS AND TECHNIQUES FOR NOZZLE COOLING OF DIESEL EXHAUST FLUID INJECTION SYSTEMS - A system is provided for delivery of diesel exhaust fluid or other reductant to an injector for release into an engine exhaust aftertreatment system. The injector includes a nozzle assembly that thermally shields the diesel exhaust fluid from the exhaust gas temperatures. A diesel exhaust fluid delivery procedure is also disclosed for nozzle cooling prior to operation of the injector for emissions reduction. | 12-11-2014 |
20140363358 | EXHAUST AFTERTREATMENT SYSTEM AND METHOD FOR OPERATING THE SYSTEM - An exhaust system includes a first SCR catalyst and a second SCR catalyst positioned downstream of the first SCR catalyst. A first injector is provided upstream of the first SCR catalyst, and a second injector is provided upstream of the second SCR catalyst. The exhaust system further includes a gaseous ammonia supply device fluidly connected to the first injector for supplying gaseous ammonia to the exhaust gas by the first injector, and an ammonia-containing reductant reservoir fluidly connected to the second injector for supplying a fluid ammonia-containing reductant, such as urea, to the exhaust gas by the second injector. The first SCR catalyst has a smaller volume than the second SCR catalyst for a fast warm-up of the first SCR catalyst. | 12-11-2014 |
20140369910 | DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHAUST SYSTEMS - A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde. | 12-18-2014 |
20140369911 | DIESEL EXHAUST FLUID FORMULATION THAT REDUCES UREA DEPOSITS IN EXHAUST SYSTEMS - A Diesel Exhaust Fluid (DEF) that includes urea, demineralized water and between 5 and 300 ppm formaldehyde, acetaldehyde, propianaldehyde, or butyraldehyde, and this formulation of DEF include less than 0.6 ppm of phosphates, calcium, iron, aluminum, magnesium, sodium, and potassium, the formulation also includes less than 0.3 ppm copper, zinc, chromium, and nickel. This formulation of DEF reduces the accumulation of urea deposit in the diesel exhaust system relative to other formulation of specification grade DEF that include less formaldehyde. | 12-18-2014 |
20150010449 | EMISSIONS CONTROL IN STATIONARY RICH BURN ENGINES - A catalyst system may include a three-way catalyst that receives exhaust gases from an engine and an ammonia slip catalyst that receives exhaust gases from the three-way catalyst. An air injection component can be configured between the three-way catalyst and the ammonia slip catalyst. A first sensor can determine first exhaust gases data and transmits that data to a controller, while a second sensor can determine second exhaust gases data and transmit that data to a controller. The controller can estimate unmeasured exhaust gases data based on the data received from the sensors and determine a setting of a component of the system and/or of the engine based on the unmeasured exhaust gases data. | 01-08-2015 |
20150023853 | METHOD FOR REDUCING NITROGEN OXIDES IN DIESEL-ENGINE EXHAUST GASES AND EXHAUST GAS AFTERTREATMENT SYSTEM FOR CARRYING OUT THE METHOD - An exhaust gas aftertreatment system, in particular for V-type diesel engines, is provided. The system includes, disposed in the exhaust line of the engine in the direction of the exhaust gas flow, a first SCR stage, a catalytically activated particulate filter (cDPF), a second SCR stage, and an ammonia slip catalyst (ASC). A method for purifying diesel engine exhaust gases containing hydrocarbons, carbon monoxide, soot particles, and nitrogen oxides consisting of NO and NO | 01-22-2015 |
20150023854 | EXHAUST GAS POST-PROCESSING APPARATUS AND CONTROL METHOD THEREOF - The present disclosure relates to an exhaust gas post-processing apparatus, and more particularly, to an exhaust gas post-processing apparatus and a control method thereof which reduce emission of nitrogen oxide (NOx) by bypassing high-temperature exhaust gas to a front end of a selective catalytic reduction. Accordingly, some embodiments of the present disclosure have been made to solve one or more of the aforementioned problems, and some embodiments of the present disclosure increase a reducing rate of nitrogen oxide by controlling a flow of exhaust gas by changing a structure of an exhaust pipe. The exhaust gas post-processing apparatus and the control method thereof according to the present disclosure may increase a reducing rate of nitrogen oxide. | 01-22-2015 |
20150030515 | Process and Apparatus for Treatment of Gas Streams Containing Nitrogen Oxides - Described is a process for the treatment of a gas stream containing nitrogen oxides. The process comprises the steps of:
| 01-29-2015 |
20150071838 | Emissions Cleaning Module - An emissions cleaning module includes a flow conduit having an upstream end fluidly connected to a source of exhaust fluid and a downstream end fluidly connected to a mixer module. An injector module has an outlet orientated to inject injection fluid into the flow conduit upstream the mixer module. A low pressure cavity downstream the injector module outlet is fluidly connected to the flow conduit or the mixer module by an open mouth orientated such that a flow of exhaust fluid along the flow conduit flows over the open mouth creating a pressure reduction within the low pressure cavity. | 03-12-2015 |
20150078975 | NATURAL GAS ENGINE AFTERTREATMENT SYSTEM - Systems and methods for reducing methane in an aftertreatment system of a vehicle are described. An oxidation catalyst is disposed in an exhaust path between an engine block and a turbocharger. The oxidation catalyst stores methane in the exhaust gas from the engine block during low temperatures and oxidizes the stored methane during high temperatures. The temperatures at the oxidation catalyst are controlled, in part, by operating engine cycles and/or a back pressure valve that can adjust pressure in the exhaust path and/or increase engine load. | 03-19-2015 |
20150078976 | SYSTEM AND METHOD FOR MIXING OF FLUIDS - A mixing element positioned at an exhaust outlet of a Selective Catalytic Reduction (SCR) module is provided. The mixing element includes a base plate having an upper surface and a lower surface. The base plate is configured to deflect a portion of a flow of a fluid around the upper surface thereof. The mixing element also includes a plurality of vanes attached to the lower surface of the base plate in a spaced apart arrangement. The plurality of vanes is configured to induce a swirling effect in a flow of the fluid received therebetween. | 03-19-2015 |
20150086454 | CATALYTIC CONVERTER APPARATUS - A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters. | 03-26-2015 |
20150086455 | METHOD FOR OPERATING AN EXHAUST GAS SYSTEM, METHOD FOR OPERATING A MOTOR VEHICLE AND MOTOR VEHICLE - A method for operating an exhaust gas system of an internal combustion engine having at least one heater and a catalytic converter for converting hydrocarbons, includes operating the heater in such a way that it is adapted to the aging state of the catalytic converter. A method for operating a motor vehicle and a motor vehicle are also provided. | 03-26-2015 |
20150093311 | EXHAUST AFTERTREATMENT SYSTEM AND METHOD PERTAINING TO SUCH A SYSTEM - An exhaust gas aftertreatment system and a method of use ( | 04-02-2015 |
20150104363 | REAGENT DOSER DIAGNOSTIC SYSTEM AND METHOD - Systems and methods are disclosed for determining or diagnosing a reagent dosing system failure to provide sufficient reagent to an exhaust aftertreatment system that includes an SCR catalyst to satisfy a reagent dosing command. | 04-16-2015 |
20150104364 | PROCESSES USING MOLECULAR SIEVE SSZ-96 - The present disclosure is directed to processes using a new crystalline molecular sieve designated SSZ-96, which is synthesized using a 1-butyl-1-methyl-octahydroindolium cation as a structure directing agent. | 04-16-2015 |
20150118132 | METHOD AND SYSTEM FOR PURIFYING THE EXHAUST GASES OF A COMBUSTION ENGINE - An SCR method for purifying the exhaust gases of an internal combustion engine of a vehicle, according to which ammonia gas is exclusively metered in the exhaust gases, the method comprising a step of releasing ammonia gas from at least one solid absorbing matrix where it is stored by sorption and a step of metering the released ammonia gas in the exhaust gases. The method is such that it comprises a step of regenerating the solid absorbing matrix that consists in: generating a refilling ammonia gas by thermally decomposing an ammonia precursor in a heater mounted on board the vehicle; directing the refilling ammonia gas to the solid absorbing matrix where it is stored thereon. | 04-30-2015 |
20150118133 | SYSTEM AND METHOD FOR TREATING EXHAUST PIPE - The system for treating exhaust gas comprises an exhaust duct, a catalytic converter arranged in the exhaust duct and an injector for injecting a substance into the system. The system further comprises a bypass duct bypassing a section of the exhaust duct, wherein the bypass duct is arranged such that only part of the catalytic converter is bypassed by the bypass duct. | 04-30-2015 |
20150125368 | CERAMIC MATERIALS FOR ABSORPTION OF ACIDIC GASES, PROCESS OF PREPARING THEREOF AND CYCLIC PROCESS FOR ABSORPTION AND REGENERATION OF ACIDIC GASES - The present invention describes the process of preparing ceramics for the absorption of ACIDIC gases, which worsen the greenhouse effect, that are released in combustion systems, or that are present in closed environments. In relation to carbon dioxide, principal target of the present invention, the process of absorption, transport, processing and transformation of the gas into other products is described. The process uses ceramic materials prepared through the solid mixture of one or more metallic oxides, with one or more binding agents and an expanding agent. The product generated can be processed and the absorbent system regenerated. The carbon dioxide obtained in the processing can be used as analytic or commercial carbonic gas, various carbamates and ammonium carbonate. | 05-07-2015 |
20150132205 | EXHAUST-GAS AFTERTREATMENT DEVICE FOR AN INTERNAL COMBUSTION ENGINE, AND METHOD FOR HEATING AN EXHAUST-GAS AFTERTREATMENT DEVICE - An exhaust-gas aftertreatment device for an internal combustion engine, for use in a motor vehicle, includes an exhaust tract with at least one exhaust pipe and at least one exhaust-gas aftertreatment element. The exhaust-pipe internal wall and/or the at least one exhaust-gas aftertreatment element have/has a vapour-sorbing material forming at least one exhaust-tract-side sorption element. | 05-14-2015 |
20150147250 | METHOD FOR OPERATING A REDUCTANT METERING PROCESS OF AN SCR CATALYTIC CONVERTER SYSTEM, AND CORRESPONDING SCR CATALYTIC CONVERTER SYSTEM - The invention relates to an SCR catalytic convertor system and a method for operating a reductant metering process of an SCR catalytic converter system ( | 05-28-2015 |
20150298098 | Zoned Catalyst Composites - Provided herein are zoned catalysts that utilize components efficiently in that relatively short zones are provided to achieve specific functionalities to convert and/or trap one or more components in the exhaust stream. Highly controlled zoned are formed from one end of a monolithic carrier. The zones have a flat profile such that the zoned catalytic material within each passage of the substrate is at a substantially uniform distance from one end of the carrier. Methods of making and using the same are also provided. | 10-22-2015 |
20150321145 | Internally Heated Urea Reactor/Injector For Use With SCR Emissions Control Device - A method of treating NOx-containing exhaust from an internal combustion engine of an automotive vehicle. Urea solution is stored on-board the vehicle and delivered to a reactor/injector unit. The reactor/injector unit is operable to thermally decompose the urea solution into reductant gases suitable for direct application to an SCR catalyst without further reaction. The reactor/injector unit injects these reductant gases into the exhaust line upstream the SCR catalyst, which reacts them with the NOx in the exhaust. | 11-12-2015 |
20150322833 | Method and cleaning apparatus for removal of SOx and NOx from exhaust gas - A method for removal of SO | 11-12-2015 |
20150328586 | METHOD AND SYSTEM FOR MITIGATING UREA DEPOSITS WITHIN AN SCR CATALYST SYSTEM - A method and system for mitigating a urea deposit within an SCR system that includes determining a mass of an accumulated urea deposit present within the SCR catalyst and SCR piping, comparing the mass of the accumulated urea deposit with a deposit upper threshold limit, and initiating an SCR regeneration event when the mass of the accumulated urea deposit is greater than the deposit upper threshold limit. The method further includes determining an amount of NH | 11-19-2015 |
20150337711 | CATALYTIC CONVERTER APPARATUS - A catalytic converter apparatus for use in an exhaust system of an internal combustion engine includes a housing having a gas inlet and a gas outlet, and at least one catalytic substrate element disposed in the housing. The at least one substrate element is divided into a plurality of zones or sections, the zones at least partially separated from one another to inhibit heat flow. The zones can be at least partially separated with walls. The walls can include insulating material for reducing the mobility of heat radially outwardly. Each of the zones defines a generally separate flow passage connecting the inlet and outlet in fluid communication. The apparatus can heat more rapidly from a cold start compared with conventional catalytic converters. | 11-26-2015 |
20150343375 | MOLECULAR SIEVE PRECURSORS AND SYNTHESIS OF MOLECULAR SIEVES - Molecular sieves, improved methods for their synthesis, and catalysts, systems and methods of using these molecular sieves as catalysts in a variety of processes such as abating pollutants in exhaust gases and conversion processes are described. The molecular sieves are made using a tailored colloid including an alumina source, a silica source and a structure directing agent. | 12-03-2015 |
20150352491 | Cyclonic Injector And Method For Reagent Gasification And Decomposition In A Hot Gas Stream - A system for vaporizing and optionally decomposing a reagent, such as aqueous ammonia or urea, which is useful for NOx reduction, includes a cyclonic decomposition duct, wherein the duct at its inlet end is connected to an air inlet port and a reagent injection lance. The air inlet port is in a tangential orientation to the central axis of the duct. The system further includes a metering valve for controlling the reagent injection rate. A method for vaporizing and optionally decomposing a reagent includes providing a cyclonic decomposition duct which is connected to an air inlet port and an injection lance, introducing hot gas through the air inlet port in a tangential orientation to the central axis of the duct, injecting the reagent axially through the injection lance into the duct; and adjusting the reagent injection rate through a metering valve. | 12-10-2015 |
20150360176 | MIXING ELEMENT - A mixing element positioned at an exhaust inlet of a Selective Catalytic Reduction (SCR) module is provided. The mixing element includes a base plate having a plurality of perforations thereon. The mixing element also includes a plurality of vanes connected to the base plate. Each of the plurality of vanes is spaced apart from one another. The plurality of vanes includes a plurality of flaps extending radially from the base plate. Each of the plurality of flaps has a planar configuration. The plurality of vanes also includes a plurality of blades attached to the plurality of flaps. Each of the plurality of blades extends axially with respect to an axis of the exhaust inlet. The blade has a curved configuration. | 12-17-2015 |
20150360178 | Base Metal Catalyst - Described are base metal catalysts that comprise a base metal material in an amount effective to generate an exotherm over a temperature range of 300° C. to 650° C. and to oxidize soot collected by a downstream particulate filter. The base metal catalysts are substantially free of platinum group metals. Emission treatment systems and methods of remediating nitrogen oxides (NO | 12-17-2015 |
20150375169 | MEMBRANE-BASED EXHAUST GAS SCRUBBING METHOD AND SYSTEM - Various exemplary embodiments relate to a method and apparatus to reduce emissions of target emission gasses such as sulfur oxides, nitrogen oxides, and carbon oxides from combustion exhaust such as marine engine exhaust by gas membrane separation and liquid carrier chemical absorption. The membrane separation system consists of an absorption system containing semi-permeable hollow fiber membranes through which is circulated a liquid absorbent. Exhaust gases contact the exterior surface of the membranes and the target gasses selectively permeate the membrane wall and are absorbed by the liquid carrier(s) within the bore and thereby are removed from the exhaust stream. | 12-31-2015 |
20160001227 | PROCESS FOR TREATING POLLUTANTS PRESENT IN EXHAUST GASES FROM AN INTERNAL COMBUSTION ENGINE, IN PARTICULAR FOR A MOTOR VEHICLE - The present invention is a process for treating pollutants present in exhaust gases moving in an exhaust line ( | 01-07-2016 |
20160008761 | SCR CATALYTIC CONVERTER HAVING IMPROVED NOx CONVERSION | 01-14-2016 |
20160024988 | EXHAUST TREATMENT SYSTEM THAT GENERATES DEBOUNCE DURATION FOR NOX SENSOR OFFSET - An exhaust treatment system configured to treat exhaust gas generated by an internal combustion engine includes a reductant delivery system that injects a reductant solution into an exhaust gas. A selective catalyst reduction (SCR) device reacts with the reductant solution to reduce NOx from the exhaust gas. A control module is in electrical communication with the SCR device and the reductant delivery system. The control module determines at least one of an injection status of the reduction delivery system and a performance of the SCR device. The control module further determines at least one debounce time for delaying diagnosis of a NOx sensor based on at least one of the injection status and the performance of the SCR device. | 01-28-2016 |
20160059180 | LIQUID, SLURRY AND FLOWABLE POWDER ADSORPTION/ABSORPTION METHOD UTILIZING WASTE HEAT FOR ON-BOARD RECOVERY AND STORAGE OF CO2 FROM MOTOR VEHICLE INTERNAL COMBUSTION ENGINE EXHAUST GASES - A method and system are described for on-board treatment of an exhaust stream containing CO | 03-03-2016 |
20160076420 | AMMONIA GENERATION SYSTEM FOR AN SCR SYSTEM - A system including a reductant source storing reductant, an ammonia generation system configured to generate gaseous ammonia via cavitation, and a gaseous ammonia delivery device in fluid communication with the ammonia generation system and an exhaust system. The system may selectively activate the ammonia generation system responsive to a detected temperature of an exhaust gas of an exhaust system being equal to or below a predetermined value. The ammonia generation system may utilize ultrasonic cavitation or laser cavitation to generate gaseous ammonia to be delivered to the exhaust system responsive to the temperature of the exhaust gas of the exhaust system being equal to or below the predetermined value. If the temperature of the exhaust gas of the exhaust system above the predetermined value, a dosing module to dose reductant to the exhaust system may be activated. | 03-17-2016 |
20160114289 | CONTROL APPARATUS, EXHAUST PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE, AND CONTROL METHOD FOR EXHAUST PURIFYING APPARATUS - A control apparatus that includes a measured NOx purification ratio calculation unit calculating a measured NOx purification ratio of a reduction catalyst based on outputs of NOx sensors and provided upstream and downstream of the reduction catalyst reducing nitrogen oxide in an exhaust gas, an estimated NOx purification ratio calculation unit calculating an estimated NOx purification ratio of the reduction catalyst based on a temperature of the reduction catalyst, a flow rate of the exhaust gas, and an absorption amount of the reducing agent by the reduction catalyst, and a reducing agent concentration estimation unit estimating a concentration of the reducing agent injected from a reducing agent injection valve based on the measured NOx purification ratio and the estimated NOx purification ratio. | 04-28-2016 |
20160121267 | THREE-WAY CATALYTIC CONVERTER - The present invention relates to a three-way catalytic converter for reducing harmful exhaust components of gasoline-powered internal combustion engines, and to a corresponding method for exhaust gas purification. The catalytic converter is characterized by a particularly inhomogeneous distribution of the oxygen-storing material present. | 05-05-2016 |
20160158698 | APPARATUS AND METHOD FOR ENGINE BACKPRESSURE REDUCTION - An improved catalytic substrate for use with a can in an automotive exhaust system. The improvement includes an insulation material thermally separating the substrate into a central zone and an outer zone surrounding the central zone. The insulation material, central zone and outer zone collectively defining a modified substrate. The insulation material is adapted such that in an operating condition, the gas flow through the modified substrate is characterized by a static pressure that, on the upstream-facing surface of the modified substrate has a peak at a point generally central to the upstream-facing surface of the modified substrate; as the upstream-facing surface extends radially away from the point to the periphery, decreases, but for a surge after the upstream-facing surface extends beyond the insulation material. | 06-09-2016 |
20160175776 | METHOD FOR OPERATING AN EXHAUST GAS AFTER-TREATMENT SYSTEM FOR AN INTERNAL COMBUSTION ENGINE | 06-23-2016 |
20160199782 | Fuel Reformer for De-NOx Trap | 07-14-2016 |