N.E. CHEMCAT CORPORATION Patent applications |
Patent application number | Title | Published |
20160051931 | UREA HYDROLYSIS CATALYST, SELECTIVE REDUCTION CATALYST CONTAINING UREA HYDROLYSIS MATERIAL, AND EXHAUST GAS CLEANING APPARATUS - A urea hydrolysis catalyst and a selective reduction catalyst containing a urea hydrolysis material which have an excellent hydrolysis ability of urea-water solution to NH | 02-25-2016 |
20160003118 | OXIDATION CATALYST AND EXHAUST GAS PURIFICATION DEVICE USING SAME - Provided is: an oxidation catalyst having excellent ability to combust diesel fuel intermittently sprayed from a nozzle disposed in an exhaust pipe, the oxidation catalyst being incorporated into an exhaust gas purification device having a diesel particulate filter (DPF) or a catalyst soot filter (CSF) for collecting particulate matter from a diesel engine; and an exhaust gas purification device that uses the oxidation catalyst. An oxidation catalyst for exhaust gas purification in which a precious metal component is carried on an inorganic matrix, wherein the inorganic matrix is one or more inorganic oxides selected from the group consisting of alumina, titania, zirconia, silica, and silica-alumina, the oxidation catalyst being characterized in the use of a material in which the activation energy of diesel fuel combustion performance is 72 kJ/mol or less. | 01-07-2016 |
20150111727 | CATALYST COMPOSITION FOR EXHAUST GAS PURIFICATION AND EXHAUST GAS PURIFYING CATALYST FOR AUTOMOBILES - The present invention is to provide a catalyst composition for exhaust gas purification, which is superior in purification performance for nitrogen oxides (NO | 04-23-2015 |
20150078966 | EXHAUST GAS PURIFIER - An exhaust gas purification catalyst apparatus, which is superior in oxidation performance of, in particular, nitrogen monoxide, among hydrocarbons, carbon monoxide, nitrogen oxides and particulate components such as soot, included in exhaust gas from a lean burn engine, and combustion performance of light oil. The exhaust gas purification apparatus arranged with an oxidation catalyst (DOC) comprising a noble metal component for oxidizing carbon monoxide, hydrocarbons, in particular, nitrogen monoxide among nitrogen oxides, and for combusting light oil, a catalyzed soot filter (CSF) including a noble metal component for collecting a particulate component such as soot and removing by combustion (oxidation). The oxidation catalyst (DOC) has a catalyst layer where platinum (Pt), palladium (Pd) and barium oxide (BaO) are supported on alumina (Al | 03-19-2015 |
20150045209 | EXHAUST GAS PURIFYING CATALYST - The invention discloses a catalyst for purifying exhaust gas apparatus having a Three-way Catalyst (TWC) superior in purification performance of, particularly, NO | 02-12-2015 |
20150038325 | CATALYST COMPOSITION FOR EXHAUST GAS CLEANING AND CATALYST FOR AUTOMOBILE EXHAUST GAS CLEANING - The present invention is to provide an exhaust gas purification catalyst composition and a catalyst for exhaust gas purification for automobile, superior in purification performance of a carbon monoxide (CO), a hydrocarbon (HC) and nitrogen oxides (NO | 02-05-2015 |
20140329669 | ALUMINA MATERIAL CONTAINING BARIUM SULFATE AND EXHAUST GAS PURIFYING CATALYST USING SAME - Disclosed are alumina materials including a barium sulfate, catalyst or adsorbent using the same, in particular, catalyst for exhaust gas purification superior in NO | 11-06-2014 |
20140065044 | AMMONIA OXIDATION CATALYST, EXHAUST GAS PURIFICATION DEVICE USING SAME, AND EXHAUST GAS PURIFICATION METHOD - Ammonia oxidation catalyst being superior in heat resistance and capable of suppressing by-production of N | 03-06-2014 |
20140050627 | OFF GAS PURIFICATION DEVICE - An exhaust gas purification catalyst apparatus. The apparatus has a noble metal component for oxidizing NOx in an exhaust gas discharged from a diesel engine, a reducing agent spraying means for supplying the reducing agent selected from a urea component or an ammonia component, and a selective reduction catalyst (SCR) not comprising a noble metal for removing by reduction NOx by contacting with the reducing agent, in this order from the upstream side of an exhaust gas passage. Activity of the selective reduction catalyst (SCR) is maintained by setting that the noble metal component of the oxidation catalyst (DOC) comprises platinum and palladium, and ratio of platinum particles existing alone is 20% or less, or average particle diameter of the noble metal is 4 nm or larger, and by suppressing volatilization of platinum from the oxidation catalyst (DOC), even when catalyst bed temperature increases up to 900° C. | 02-20-2014 |
20140044635 | AMMONIA OXIDATION CATALYST, EXHAUST GAS PURIFICATION DEVICE USING SAME, AND EXHAUST GAS PURIFICATION METHOD - An ammonia oxidation catalyst being superior in heat resistance and capable of suppressing by-production of N | 02-13-2014 |
20130236381 | DENITRATION CATALYST COMPOSITION AND METHOD OF DENITRATION USING SAME - A denitration catalyst composition to efficiently and reductively remove nitrogen oxides from exhaust gas of a boiler or an internal combustion engine operated in lean-combustion, such as a gasoline engine, a diesel engine, by carbon monoxide and hydrocarbons; and a denitration method using the catalyst composition. In the denitration catalyst composition, a precious metal element having Rh as an essential component is supported on a zirconium oxide-based carrier formed by condensing or mixing primary particles having a zirconium oxide as a main component, and further a cerium-containing oxide (B) is present at the surface of the zirconium oxide-based carrier and at the gap of the secondary particles; and a denitration method characterized in that exhaust gas containing NO, CO and O | 09-12-2013 |
20130230441 | SELECTIVE REDUCTION CATALYST, AND EXHAUST GAS PURIFICATION DEVICE AND EXHAUST GAS PURIFICATION METHOD USING SAME - The selective reduction-type catalyst effectively purifies nitrogen oxides contained in exhaust gas from a lean-burn engine such as a boiler, a gas turbine or a lean-burn engine, a diesel engine, even under high SV, as well as having small pressure loss, by supplying by spraying urea water or ammonia water, as a reducing component, to the selective reduction-type catalyst; and an exhaust gas purification apparatus along with an exhaust gas purification method using the same. The selective reduction-type catalyst for selectively reducing a nitrogen oxide by adding urea or ammonia as a reducing agent of the nitrogen oxide to exhaust gas discharged from a lean-burn engine, characterized by coating a catalyst layer including zeolite containing at least an iron element, and a composite oxide of silica, tungsten oxide, ceria and zirconia, as denitration components, at the surface of a monolithic structure-type substrate. | 09-05-2013 |
20130177839 | REDUCTION CATALYST COMPRISING PALLADIUM-GOLD ALLOY - Provide is a reduction catalyst, which comprises conductive carbon and a palladium-gold alloy supported on the carbon, wherein the alloying degree of said alloy is 50 to 100%. This palladium-supported catalyst has an excellent reduction ability, and exhibits a high conversion ratio and preferably an excellent selectivity when used for hydrogenation reaction. The reduction catalyst is useful as a catalyst for oxygen reduction or as a catalyst for hydrogenation. The catalyst for oxygen reduction is useful as a cathode electrode catalyst for polymer electrolyte fuel cells. The cathode electrode catalyst can be used for a cathode electrode for polymer electrolyte fuel cells. | 07-11-2013 |
20130095013 | EXHAUST GAS PURIFICATION CATALYST APPARATUS USING SELECTIVE REDUCTION CATALYST, EXHAUST GAS PURIFICATION METHOD, AND DIESEL AUTOMOBILE MOUNTED WITH EXHAUST GAS PURIFICATION CATALYST APPARATUS - An exhaust gas purification catalyst apparatus is arranged with an oxidation catalyst (DOC) having a noble metal component for oxidizing a nitrogen oxide (NO) in exhaust gas discharged from a diesel engine, a reducing agent spraying means for supplying a reducing agent selected from an urea component or an ammonia component, and a selective reduction catalyst (SCR) for reducing the nitrogen oxide (NO | 04-18-2013 |
20120328499 | EXHAUST GAS PURIFICATION CATALYST APPARATUS USING SELECTIVE REDUCTION-TYPE CATALYST AND EXHAUST GAS PURIFICATION METHOD - The selective reduction-type catalyst (SROC) has a lower catalyst layer (A) and an upper catalyst layer (B) at the surface of an integral structure-type carrier (C). the lower catalyst layer (A) contains the following components (i) a noble metal component, component (ii) alumina, titania, silica, zirconia, tungsten oxide, a transition metal oxide, a rare earth oxide, and a complex oxide thereof, and component (iii) zeolite. The upper catalyst layer (B) does not substantially contain the following component (i) and contains the following component (iii). The component (i) of the lower catalyst layer (A1) of the selective reduction-type catalyst (SROC1) at the forward stage contains a platinum component of 90% by weight or more in metal equivalent. The component (i) of the lower catalyst layer (A2) of the selective reduction-type catalyst (SROC2) at the backward stage contains a palladium component of 40% or more in metal equivalent. | 12-27-2012 |
20110274603 | EXHAUST GAS PURIFICATION CATALYST, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification catalyst, which is suitable as a Three Way Catalyst for efficiently purifying carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO | 11-10-2011 |
20110171092 | Cerium/zirconium-base composite oxide, method for producing the same, oxygen storage/release component using said cerium-zirconium-base composite oxide, exhaust gas purification catalyst, and exhaust gas purification method using the same - This invention relates to a cerium—zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium—zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 μmol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 μmol/g. The cerium—zirconium-base composite oxide can be produced, for example, by mixing a starting material for cerium and a starting material for zirconium at a predetermined mixing ratio together, melting the starting material mixture at a temperature at or above the melting point, then cooling the melt to form an ingot, then optionally grinding the ingot to prepare powder, subsequently removing strain within powder crystal grains under heating, and then grinding to a further fine state. | 07-14-2011 |
20110113754 | EXHAUST GAS PURIFICATION CATALYST, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - An exhaust gas purification catalyst, which is suitable as a Three way catalyst for efficiently purifying carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NO | 05-19-2011 |
20110047975 | HONEYCOMB STRUCTURE-TYPE CATALYST FOR PURIFYING EXHAUST GAS EXHAUSTED FROM AUTOMOBILE, METHOD FOR PRODUCING THE SAME AND METHOD FOR PURIFYING EXHAUST GAS USING THE SAME CATALYST - A catalyst for purifying exhaust gas, which is a relatively cheap three-way-catalyst containing noble metal components, and is capable of suppressing sintering of the noble metals even at high temperature, and purifying a carbon monoxide (CO), a hydrocarbon (HC) and a nitrogen oxide (NOx), and is superior, in particular, in purifying the nitrogen oxide, along with a method for purifying exhaust gas. This catalyst is provided by a honeycomb structure-type catalyst having a carrier made of a honeycomb-type structure, coated with a catalyst composition in two or more layers, for purifying a carbon monoxide, a hydrocarbon and a nitrogen oxide contained in exhaust gas, characterized in that; a catalyst layer (A) at the upper layer side comprises a palladium component supported with a heat resistant inorganic oxide, an oxygen storage release material and a barium component, and a catalyst layer (B) at the lower layer side comprises a rhodium component supported with a cerium-zirconium-type composite oxide having a cerium/zirconium ratio by weight of 0.05 to 0.2, as converted to an oxide, or the like. | 03-03-2011 |
20110041486 | APPARATUS OF CATALYST FOR PURIFYING EXHAUST GAS AND METHOD FOR PURIFYING EXHAUST GAS - An apparatus of a catalyst for purifying exhaust gas suitable as a three-way catalyst (TWC) apparatus to be used for purifying carbon monoxide (CO), a hydrocarbon (HC) and a nitrogen oxide (NO | 02-24-2011 |
20110004010 | ORGANIC INORGANIC COMPOSITE MATERIAL AND UTILIZATION THEREOF - The invention has an object to obtain an organic inorganic composite material having high activity and high selectivity, and suitable as a catalyst material having small elution of an active metal from a carrier, and further to obtain an organosilicon compound suitable for the preparation of the composite material. The composite material is an organic inorganic composite material comprising an organosilicon compound having at least two groups containing reactive silicon at a molecular end, bonded to one silicon atom constituting the organosilicon compound, and an inorganic oxide material, the organosilicon compound and the inorganic oxide material being bonded to each other through a plurality of groups containing reactive silicon of the organosilicon compound. The organosilicon compound is represented by the following general formula (1) or (2). Formula (1) wherein symbols are the same as defined in claim | 01-06-2011 |
20100196221 | Selective catalytic reduction type catalyst, and exhaust gas purification equipment and purifying process of exhaust gas using the same - The present invention is an exhaust gas purification catalyst equipment, and a method of use thereof, formed by arranging a selective catalytic reduction type catalyst for purifying nitrogen oxides in exhaust gas exhausted from lean combustion engines using ammonia or urea as a reducing agent, it is provided with a selective catalytic reduction type catalyst, characterized in that said catalyst comprises a lower-layer catalyst layer (A) having an oxidative function for nitrogen monoxide (NO) in exhaust gas and an upper-layer catalyst layer (B) having an adsorbing function for ammonia on the surface of a monolithic structure type carrier (C), and that the lower-layer catalyst layer (A) comprises a noble metal component (i), an inorganic base material constituent (ii) and zeolite (iii), and the upper-layer catalyst layer (B) comprises substantially none of component (i) but the component (iii), in a flow path of exhaust gas, characterized in that a spraying means to supply an urea aqueous solution or an aqueous ammonia solution is arranged in the downstream of the aforementioned oxidation catalyst and in the upstream of aforementioned selective catalytic reduction type catalyst. | 08-05-2010 |
20100143223 | Denitrification Catalyst, Honeycomb Structure Type Denitrification Catalyst, and Method of Denitrification with the Same - A denitrification catalyst and a honeycomb structure type denitrification catalyst which are used for efficiently removing nitrogen oxides through reduction from exhaust gases discharged from, e.g., boilers and internal combustion engines such as a gasoline engine and diesel engine; and a method of denitrification using either of these catalysts. The denitrification catalyst is for use in reducing nitrogen oxides contained in an exhaust gas with an ammonia source and comprises zeolite as the main ingredient, and is characterized in that not only iron element and cerium element but tin element and/or gallium element has been deposited on the zeolite. The honeycomb structure type denitrification catalyst comprises the denitrification catalyst and a honeycomb structure support whose surface has been covered therewith. The denitrification method is characterized by adding ammonia or urea as a reducing agent to an exhaust gas containing nitrogen oxides and bringing the mixture into contact with the denitrification catalyst or honeycomb structure type denitrification catalyst at a temperature in the range of 170-550° C. | 06-10-2010 |
20100061903 | CATALYST SYSTEM TO BE USED IN AUTOMOBILE EXHAUST GAS PURIFICATION APPARATUS, EXHAUST GAS PURIFICATION APPARATUS USING THE SAME AND EXHAUST GAS PURIFICATION METHOD - A catalyst system to be used in an automobile exhaust gas purification apparatus which exerts excellent purification capability to a nitrogen oxide, even when hydrocarbon concentration varies, by subjecting exhaust gas discharged from an automotive internal engine to contacting with a catalyst, an exhaust gas purification apparatus using the same, and an exhaust gas purification method. | 03-11-2010 |
20090317289 | PROCESS FOR PRODUCING METAL NANOPARTICLE AND METAL NANOPARTICLE PRODUCED BY THE PROCESS - The present invention has an object of providing a single-stage production method that enables the production of ultra fine metal nanoparticles and ordered alloy nanoparticles within solution. | 12-24-2009 |
20090269265 | Exhaust gas purification method using selective reduction catalyst - An exhaust gas purification method which is capable of purifying nitrogen oxide to be included in exhaust gas from a lean burn engine such as a boiler, a gas turbine or a lean-burn-type gasoline engine, a diesel engine, effectively, in particular, even at low temperature, with spray-supplying an aqueous solution of urea as the reducing component to the selective reduction catalyst. | 10-29-2009 |
20090075815 | Fine Tetrahedral Palladium Particle and Process for Producing Fine Metallic Particle - An object of the present invention is to provide tetrahedral fine palladium particles having a high degree of shape selectivity, and a process for producing fine metal particles. | 03-19-2009 |
20080286184 | Selective catalytic reduction type catalyst, and exhaust gas purification equipment and purifying process of exhaust gas using the same - The present invention relates to a technology to purify nitrogen oxides contained in exhaust gas exhausted from lean combustion engines such as diesel engine with ammonia and a selective catalytic reduction type catalyst, and an object of the present invention is to provide a selective catalytic reduction type catalyst which can effectively purify nitrogen oxides even at a low temperature as well as inhibit leak of ammonia, and an exhaust gas purification equipment and a purifying process of exhaust gas using the same. | 11-20-2008 |
20080271441 | Exhaust gas purification catalyst for automobile, exhaust gas purification catalyst system and purifying process of exhaust gas - The present invention provides an exhaust gas purification catalyst for automobile which is capable of raising temperature of exhaust gas exhausted from combustion engines such as diesel engine cars and converting NO in the exhaust gas to NO | 11-06-2008 |