Class / Patent application number | Description | Number of patent applications / Date published |
423237000 | Ammonia | 44 |
20080241033 | Ammonia storage for on-vehicle engine - Ammonia is used as precursor source of hydrogen fuel in an on-vehicle internal combustion engine. Ammonia is stored as, for example, a ligand in an on-vehicle transition metal composition. Upon demand for hydrogen by the vehicle's engine control system, ammonia is expelled as a gas from some of the composition and the ammonia gas is dissociated into a mixture of hydrogen and nitrogen and delivered as a fuel-containing mixture to the engine. In a preferred embodiment, the hydrogen is used as a supplement to gasoline as a fuel for engine operation. | 10-02-2008 |
20080247927 | Ammonia Destruction Methods for Use in a Claus Tail Gas Treating Unit - Oxidative and reductive methods are described for the cost-effective destruction of an ammonia-bearing gas stream, potentially containing minor but significant quantities of hydrogen sulfide (H | 10-09-2008 |
20080292519 | Bifunctional Catalysts for Selective Ammonia Oxidation - Catalysts, methods, and systems for treating diesel engine exhaust streams are described. In one or more embodiments, the catalyst comprises platinum, a second metal from one of the groups VB, VIIB, VIIB, VIIIB, IB, or IIB of the periodic table, a refractory metal oxide, and a zeolite, the oxidation catalyst already being effective to remove ammonia at temperatures less than about 300° C. and exhibiting no significant decrease in ammonia oxidation efficiency upon hydrothermal aging. A method aspect includes first passing a vehicle's engine exhaust stream through a NO | 11-27-2008 |
20090060809 | Ammonia Decomposition Catalyst and Process for Decomposition of Ammonia Using the Catalyst - Disclosed is a catalyst useful for catalytic decomposition of high concentration ammonia, and also disclosed is a process for decomposing ammonia using the catalyst. As the ammonia decomposion catalyst, a catalyst which supports a metallic element selected from Fe, Co, Ni and Cu by ion exchange method on porous silica alumina having an Si/Al atomic ratio of 1 to 90 and a specific surface area of 200 to 900 m | 03-05-2009 |
20090087367 | Ammonia Oxidation Catalyst for Power Utilities - The present invention is directed to a method for removal by oxidation of the excess ammonia (NH | 04-02-2009 |
20090246108 | Method For Removing Ammonia From Fluid Streams - A method for the removal of ammonia and its salts from fluid compositions. The method comprises contacting the fluid compositions with a scavenger on a solid support. | 10-01-2009 |
20100098611 | Catalyst for decomposing nitrous oxide and method for performing processes comprising formation of nitrous oxide - The present invention relates to a catalyst comprising 0.1-10 mol % CO | 04-22-2010 |
20100166631 | DEVICE AND METHOD FOR CATALYTIC GAS PHASE REACTION AND THE USE THEREOF - Improved reactors for catalytic, exothermic gas-phase reactions, which comprise, viewed in the flow direction of a feed gas, an inlet zone ( | 07-01-2010 |
20100266469 | REMOVAL OF AMMONIA FROM FLUIDS - A method and equipment for removing ammonia from effluent, flue or waste fluids that include oxygen. The method includes at least the following stages: Part of the fluid ( | 10-21-2010 |
20100284875 | TREATMENT OF POWER UTILITIES EXHAUST - Provided is a process for treating nitrogen oxide-containing exhaust produced by a stationary combustion source by the catalytic reduction of nitrogen oxide in the presence of a reductant comprising hydrogen, followed by ammonia selective catalytic reduction to further reduce the nitrogen oxide level in the exhaust. | 11-11-2010 |
20100296990 | Dry Scrubbing Air Filtration Media - A solid air filtration medium includes an impregnate with an organic amine and an inorganic metal salt. The medium has from about 0.1 to about 25% by weight of impregnate. The impregnate contains from about 0.1 to about 5% by weight organic amine, and the organic amine includes aqueous urea, solid urea, melamine or mixtures thereof. The impregnate contains from about 0.1 to about 5% by weight metal salt, and the metal salt includes magnesium oxide, calcium oxide or mixtures thereof. The impregnate optionally further includes a surfactant such as polyacrylic acid. Methods for forming a solid air filtration medium having an impregnate containing an organic amine and an inorganic metal salt and methods for removing contaminants from a fluid stream are also provided. | 11-25-2010 |
20100303695 | METHOD AND PLANT FOR THE TREATMENT OF EFFLUENTS CONTAINING NITROGEN IN A SEQUENCING BATCH REACTOR - Method for the treatment of effluents containing nitrogen in the form of ammonium, according to which: a volume of effluent to be treated in a complete cycle is introduced into the batch reactor in successive volume fractions, each volume fraction being treated during a subcycle: each subcycle comprises a phase of feeding with a volume fraction and, in an alternating manner, two treatment stages, i.e. an aerated first stage, during which complete or partial oxidation of the ammonium so as to give nitrites takes place, followed by a nonaerated second stage, during which the nitrites produced and the ammonium are converted to nitrogen gas. During the aerated first stage, the dissolved oxygen concentration in the batch reactor is maintained between 0.1 mgO | 12-02-2010 |
20100303696 | METHOD OF TREATING A GAS STREAM - A method is described for treating a gas stream containing either fuel only or both fuel and oxidant gases, such as hydrogen, nitrous oxide or a hydrocarbon gas. The gas stream is conveyed through a vacuum pumping arrangement comprising a plurality of pumping stages. Either immediately before or immediately after the final pumping stage, the steps of adding a gaseous oxidant to the gas stream and oxidising the fuel gas are performed. By treating the gas stream in this manner, the risk of uncontrolled combustion of the fuel gas can be minimised. | 12-02-2010 |
20110110835 | Catalyst for decomposing nitrous oxide and method for performing processes comprising formation of nitrous oxide - The present invention relates to a catalyst comprising 0.1-10 mol % Co | 05-12-2011 |
20110158875 | SELECTIVE CATALYTIC OXIDATION OF AMMONIA TO WATER AND NITROGEN - A catalyst includes a platinum coating deposited on a silica support. The support has an average surface area between about 100 m | 06-30-2011 |
20110182791 | CATALYSTS FOR THE REDUCTION OF AMMONIA EMISSION FROM RICH-BURN EXHAUST - A system for reducing ammonia (NH3) emissions includes (a) a first component comprising a first substrate containing a three-way catalyst, wherein the first component is disposed upstream of a second component comprising a second substrate containing an ammonia oxidation catalyst, wherein said ammonia oxidation catalyst comprises a small pore molecular sieve supporting at least one transition metal; and (b) an oxygen-containing gas input disposed between the components. For example, a CHA Framework Type small pore molecular sieve may be used. A method for reducing NH | 07-28-2011 |
20110206588 | METHOD AND APPARATUS FOR REMOVING AMMONIA FROM A GAS STREAM - The present disclosure provides a method for removing ammonia from a gas stream, comprising contacting the gas stream with a substrate having anions carried on a surface thereof, whereupon ammonia in the gas stream attaches to the substrate by reacting with the anions. | 08-25-2011 |
20110256045 | PROCESS FOR PRODUCING AMMONIUM SALTS - In one embodiment, the invention is to a process of producing an ammonium salt composition. The process comprises the step of providing a process stream comprising sulfuric acid and at least one tertiary amine. The process further comprises the step of contacting the process stream with ammonia under conditions effective to form a waste stream and a product stream. The waste stream comprises water, the tertiary amine, and ammonia and the product stream comprises a first amount of ammonium salt. The process further comprises the step of deriving from the waste stream an off gas stream comprising a preliminary amount of ammonia. The process also comprises the step of contacting the off gas stream with an acid under conditions effective to form an ammonium salt stream and a purge stream. The ammonium salt stream comprises a second amount of ammonium salt and the purge stream comprises a reduced amount of ammonia, which is less than the preliminary amount. | 10-20-2011 |
20110256046 | PROCESS FOR PRODUCING AMMONIUM SALTS - In one embodiment, the invention is to a process for producing an ammonium salt composition. The process comprises the step of providing a process stream comprising sulfuric acid, methylene dichloride, and a tertiary amine or a precursor thereof. The process further comprises the step of contacting the process stream with ammonia under conditions effective to form a product stream and a waste stream. The product stream comprises the ammonium salt and the waste stream comprises water, methylene dichloride, ammonia, and the tertiary amine. The process further comprises the step of deriving from the waste stream an off gas stream comprising ammonia and a first amount of methylene dichloride. The process also comprises the step of contacting at least a portion of the off gas stream or a derivative thereof with an adsorbent under conditions effective to separate at least a portion of the off gas into a methylene dichloride stream comprising methylene dichloride. | 10-20-2011 |
20120093705 | METHOD FOR TREATING REFINERY WASTE STREAMS IN A FLUID CATALYTIC CRACKING UNIT AND AN IMPROVED CATALYTIC CRACKING UNIT FOR PROCESSING REFINERY WASTE STREAMS - A method of processing the waste stream includes introducing the waste stream into the Fluid Catalytic Cracking Unit | 04-19-2012 |
20130039828 | CATALYST STRUCTURES - A catalyst structure suitable for use in an ammonia oxidation process is described including a plurality of shaped catalyst units supported on one or more members in a spaced relationship that allows the structure to flex. | 02-14-2013 |
20130224094 | AMMONIA DESTRUCTION METHODS FOR USE IN A CLAUS TAIL GAS TREATING UNIT - Oxidative and reductive methods are described for the cost-effective destruction of an ammonia-bearing gas stream, potentially containing minor but significant quantities of hydrogen sulfide (H | 08-29-2013 |
20140079616 | CATALYSTS FOR THE REDUCTION OF AMMONIA EMISSION FROM RICH-BURN EXHAUST - A system for reducing ammonia (NH | 03-20-2014 |
20140154163 | AMMONIA OXIDATION CATALYST - Provided is a catalyst article for treating an emission gas comprising (a) a noble metal catalyst layer comprising one or more noble metals disposed on a first refractory metal oxide support; and (b) a vanadium catalyst layer comprising vanadium pre-fixed on a second refractory metal oxide support selected from alumina, titania, zirconia, ceria, silica, and mixtures of these, wherein the first catalyst layer is in physical contact with said second catalyst layer. Also provided is a method for making such a catalyst article, a method for treating gas emissions using such an article, and an emission gas treatment system incorporating such an article. | 06-05-2014 |
20140161699 | Method and System for Anhydrous Ammonia Recovery - An apparatus for recycling exhaust gas includes a vessel containing a reversible ammonia sorber material which is exothermic when sorbing (“loading”) ammonia and which is endothermic when releasing (“unloading”) ammonia. A first valve selectively couples a source of exhaust gas including ammonia to a first port of the vessel, a second valve selectively couples a vacuum pump to the vessel, and a third valve selectively coupling a second port of the vessel to an output. A controller opens and closes the first valve, the second valve and the third valve to implement a loading phase, an intermediate venting phase and an unloading phase for the vessel. | 06-12-2014 |
20140170045 | PLATINUM GROUP METAL (PGM) CATALYST FOR TREATING EXHAUST GAS - Provided are catalysts comprising a small pore molecular sieve embedded with platinum group metal (PGM) and methods for treating lean burn exhaust gas using the same. | 06-19-2014 |
20140186250 | CARBONYL FUNCTIONALIZED POROUS INORGANIC OXIDE ADSORBENTS AND METHODS OF MAKING AND USING THE SAME - An adsorbent material comprising a porous inorganic oxide material grafted with a molecule comprising a carbonyl functional group is provided. The porous inorganic oxide material can be a porous silica material or Zr(OH) | 07-03-2014 |
20140212350 | AMMONIA OXIDATION CATALYST - A catalyst article for treating an emission gas is provided comprising (a) a first catalyst layer having a plurality of consecutive sub-layers, wherein each sub-layer includes vanadium on a first refractory metal oxide support selected from alumina, titania, zirconia, ceria, silica, and mixtures of these; (b) a second catalyst layer comprising one or more noble metals disposed on a second refractory metal oxide support; and (c) a substrate, wherein the first and second catalyst layers are on and/or within the substrate. | 07-31-2014 |
20140248202 | PROCESS FOR INCINERATING NH3 AND A NH3 INCINERATOR - This invention relates to a process for incinerating NH3 in an NH3 incinerator comprising a first incineration step at controlled sub-stoichiometric incineration conditions and a second incineration step with at a greater than stoichiometric amount of oxygen, whereby a product stream is produced with reduced NO formation. The invention also relates to an NH3 incinerator. | 09-04-2014 |
20150017082 | PROCESS FOR ELIMINATION OF HEXAVALENT CHROMIUM COMPOUNDS ON METALLIC SUBSTRATES WITHIN ZERO-PGM CATALYST SYSTEMS - Systems and Methods for manufacturing ZPGM catalysts systems that may allow the prevention of formation or the conversion of corrosion causing compounds, such as hexavalent chromium compounds, within ZPGM catalyst systems are disclosed. ZPGM catalysts systems, may include metallic substrate, which may include alloys of iron and chromium, a washcoat and an overcoat. Disclosed manufacturing processes may include a thermal decomposition of hexavalent chromium compounds which may allow the decomposition of such compounds into trivalent chromium compounds, and may also produce metallic catalyst, such as silver. | 01-15-2015 |
20150352492 | NON-PGM AMMONIA SLIP CATALYST - An ammonia slip catalyst having an SCR catalyst and an oxidation catalyst comprising at least two metals, each of which is selected from a specific group, and a substrate upon which at least oxidation catalyst is located is described. The ammonia slip catalyst can have dual layers, with one of the layers containing an SCR catalyst, a second layer containing the oxidation catalyst with comprises at least two metals, each of which is selected from a specific group, and the ammonia slip catalyst does not contain a platinum group metal. Methods of making and using the ammonia slip catalyst to reduce ammonia slip are described. | 12-10-2015 |
20150367330 | AMMONIA OXIDATION CATALYST FOR THE PRODUCTION OF NITRIC ACID BASED ON YTTRIUM-GADOLINIUM ORTHO COBALTATES - The present invention relates to a catalytically active component of a catalyst, which comprises single phase oxides, based on a mixed yttrium-gadolinium ortho-cobaltate oxide systems, methods for the oxidation of ammonia and hydrocarbon in the presence of said catalytically active component and the use thereof. | 12-24-2015 |
20150375220 | CATALYST HAVING A THREE-DIMENSIONAL DENT STRUCTURE IN THE FORM OF A HEXAGON - A catalyst includes a gas-permeable textile sheet material made of noble-metal-containing wire having a three-dimensional secondary structure produced thereon. The secondary structure is a three-dimensional dent structure including dents arranged adjacent to each other in rows in two spatial directions. The dents are in the form of a hexagon. The dent structure is formed by self-organization in a denting process. | 12-31-2015 |
20160001224 | METHOD AND SYSTEM FOR REMOVING AMMONIA FROM A VENT GAS STREAM OF A UREA PLANT - A method of removing ammonia from a continuous vent gas stream of a urea plant, in particular of a medium-pressure section of a urea plant, includes a step of removing ammonia from the continuous vent gas stream of the urea plant using a controlled-combustion process including at least a first lean, oxygen-poor combustion step performed in the presence of an understoichiometric amount of oxygen acting as the sole comburent, and in a reducing atmosphere of hydrogen. | 01-07-2016 |
20160167962 | AMMONIA OXIDATION/DECOMPOSITION CATALYST | 06-16-2016 |
423238000 | Utilizing liquid as reactant | 9 |
20090104099 | RICH GAS ABSORPTION APPARATUS AND METHOD - The present invention relates to an apparatus comprising a co-current absorbing unit, a countercurrent absorbing unit, at least one absorbing liquid reservoir, and at least one liquid transferring means. The invention also relates to a method of absorbing a reactive gas and a method of preparing a solution by contacting a reactive gas to a solvent and allowing the reactive gas to react with the solvent. | 04-23-2009 |
20100290965 | COMBUSTION FLUE GAS NOx TREATMENT - Combustion flue gas containing NO | 11-18-2010 |
20110142740 | METHOD AND SYSTEM FOR TREATMENT OF MALODOROUS GASES EMANATING FROM A PULP MILL - The method and system relate to reducing the content of hazardous chemicals when handling malodorous gases emanating from a pulp mill and before burning said malodorous gases in final incineration equipment in oxygen excess environment in order to oxidize the sulphur compounds. The flow of malodorous gases is transported to final incineration (C | 06-16-2011 |
20110229394 | UREA GRANULATION PROCESS WITH AN ACIDIC SCRUBBING SYSTEM AND THE SUBSEQUENT INTEGRATION OF AMMONIUM SALT INTO UREA GRANULES - A process for the granulation of urea with a scrubbing system includes several waste streams for removal of dust and ammonia from the off-gas of a urea granulation unit. A urea granulator, a granulator scrubber dust stage, a granulator scrubber acid stage, product coolers, a product cooler scrubber dust stage, an evaporation unit, and a condenser unit are included in the system. A first stream of fresh air is sent into the urea granulator, whereby dust- and ammonia-laden air is drawn off from the granulator and conveyed into a granulator scrubber dust stage, followed by a granulator scrubber acid stage and ammonia is scrubbed from that air by the generation of an ammonium salt. A second stream of fresh air is used for cooling the product drawn off from the urea granulator in product coolers. The cooling air is thus heated up and conveyed to a product cooler scrubber dust stage. The clean off-gas drawn off from the granulator scrubber acid stage, and the clean off-gas drawn off from the product cooler scrubber dust stage, are released into the atmosphere. The scrubbing system is a complete closed system, and totally decoupled from urea synthesis. The ammonium salt solution stream from the granulator scrubber acid stage, is fed into the product cooler scrubber dust stage, whereby the ammonia of the dust-laden air stream exiting the product coolers is removed, and the released liquor from the product cooler scrubber dust stage and the released liquor from the granulator scrubber dust stage is sent to the evaporation unit. The vapour stream from the evaporation unit, which contains ammonia is sent to the condenser unit, which releases a liquid process condensate which is sent into the granulator scrubber acid stage, and the concentrated liquid stream from the evaporation unit, containing urea and ammonium salt, and a urea melt from a synthesis unit are conveyed into the urea granulator, separately. Thereby the ammonium salt contained in the concentrated liquor stream is integrated into the granulated urea product. | 09-22-2011 |
20110280779 | REMOVAL OF AMMONIA NITROGEN, AMMONIUM NITROGEN AND UREA NITROGEN BY OXIDATION WITH HYPOCHLORITE-CONTAINING SOLUTIONS FROM EXHAUST AIR IN PLANTS FOR PRODUCING AMMONIA AND UREA - Process for scrubbing out ammonia nitrogen and/or ammonium nitrogen and/or urea nitrogen from exhaust gases enriched with these nitrogen compounds in plants for producing ammonia or urea, wherein the nitrogen compounds first form with a hypochlorite-containing solution in a scrubber an intermediate which under acidic or neutral reaction conditions is reacted to form elemental nitrogen and salt, and the reaction of the nitrogen compounds to form elemental nitrogen and salt proceeds in a pH range of 4 to 6. | 11-17-2011 |
20120009108 | Combined Waste Gas Treatment Of Waste Gas Streams Containing Ammonia And Nitrogen Oxides In Industrial Plants - Combined removal of both ammonia from an ammonia-containing waste gas and nitrogen oxides from a nitrogen oxide-containing waste gas in a combined ammonia/urea synthesis plant is accomplished by mixing the gases and employing one or both of selective non-catalytic reduction at a temperature of 850° C. to 1100° C. or selective catalytic reduction at a temperature of 150° C. to 550° C., in which the ammonia and the nitrogen oxides react with one another to give nitrogen and water, the ammonia-containing waste gas derived from a low-pressure and/or atmospheric absorber of the urea synthesis plant, and the nitrogen oxide-containing waste gas derived from a flue gas duct of a primary reformer of the ammonia synthesis plant, both the ammonia and the nitrogen oxides of the mixed waste gas flows being depleted simultaneously during the same process step. | 01-12-2012 |
20140086813 | PROCESS AND PLANT FOR THE REMOVAL OF NITROGEN OXIDES FROM OXYGEN-CONTAINING GAS STREAMS - The invention relates to a process for the removal of NO and NO | 03-27-2014 |
20150343376 | ELIMINATION OF AMMONIA AND LOWER ALKANES AND/OR HYDROGEN FROM WASTE GAS STREAMS IN INDUSTRIAL PLANTS - Methods for the combined elimination of both ammonia and lower alkanes and/or hydrogen, which are contained in one or more waste gas streams in an industrial plant, are disclosed herein. The method is effectuated by combined oxidation and reduction according to the reduction-oxidation process, wherein the ammonia and the lower alkanes and/or hydrogen are completely or partially reacted by chemical reaction to form nitrogen, carbon dioxide and water. The waste gas stream containing ammonia and lower alkanes and/or hydrogen is passed over one or more catalysts for the combined oxidation and reduction, and the oxygen content in the waste gas stream is set in such a way that ammonia and the lower alkanes and/or hydrogen are oxidized first in an oxidation zone to form nitrogen, carbon dioxide and water, and the nitrogen oxides resulting therefrom are subsequently reduced in a reduction zone to form elemental nitrogen. | 12-03-2015 |
20160250589 | WET SCRUBBER APPARATUS FOR AMMONIA CAPTURE | 09-01-2016 |