Abstract: The present invention relates to a stoichiometric-combustion spark-ignition engine comprising a specific exhaust gas system for reducing harmful exhaust gases resulting from the combustion process. The exhaust gas system consists in the through-flow direction of a three-way catalytic converter close to the engine, an oxidation catalyst and a gasoline particulate filter.

Abstract: Described are a catalyst capable of effectively oxidizing an exhaust gas, a method for preparing the catalyst, and a method for oxidizing an exhaust gas using the catalyst. The exhaust gas oxidation catalyst includes at least two layers, a lower catalyst layer and an upper catalyst layer, laminated on a three-dimensional structure, wherein the lower catalyst layer and the upper catalyst layer independently contain precious metal and alumina and/or zeolite, and at least a part of the upper catalyst layer contains pores derived from a pore connecting agent with a combustion decomposition temperature of 300° C. or more to less than 450° C.

Abstract: A three-dimensional structure (10); and a catalytic component (100) that contains a precious metal complex (22) containing platinum and palladium and a porous material (21), which is supported on the three-dimensional structure (10); where the surface accumulation C (Pt) of the platinum is 0.00070 or more to 0.01000 or less, the surface accumulation C (Pd) of the palladium is 0.00800 or more to 0.10000 or less, the surface accumulation C (Pt) is expressed by C (Pt)=PXPS (Pt)/(d2×PTEM (Pt)×0.01), and the surface accumulation C (Pd) is expressed by C (Pd)=PXPS (Pd)/(d2×PTEM (Pd)×0.01).

Abstract: It is an object to provide a catalyst that can effectively purify exhaust gas, in particular, carbon monoxide (CO) in exhaust gas, emitted from a diesel engine, a production method therefor, and an exhaust gas purification method using the same. A diesel engine exhaust gas purification catalyst for purifying exhaust gas emitted from a diesel engine of the present invention comprises a precious metal and alumina and/or zeolite supported on a three-dimensional structure, and has peaks for not less than three different pore sizes in a pore size distribution measured by the mercury intrusion method, wherein one of the peaks is a peak 2 at a pore size of not less than 0.3 ?m and less than 1.0 ?m, and the pore volume of the peak 2 being greater than 3.1% of the total pore volume.

Abstract: Described are a catalyst capable of effectively oxidizing an exhaust gas, a method for preparing the catalyst, and a method for oxidizing an exhaust gas using the catalyst. The exhaust gas oxidation catalyst includes at least two layers, a lower catalyst layer and an upper catalyst layer, laminated on a three-dimensional structure, wherein the lower catalyst layer and the upper catalyst layer independently contain precious metal and alumina and/or zeolite, and at least a part of the upper catalyst layer contains pores derived from a pore connecting agent with a combustion decomposition temperature of 300° C. or more to less than 450° C.

Abstract: It is an object to provide a catalyst that can effectively purify exhaust gas, in particular, carbon monoxide (CO) in exhaust gas, emitted from a diesel engine, a production method therefor, and an exhaust gas purification method using the same. A diesel engine exhaust gas purification catalyst for purifying exhaust gas emitted from a diesel engine of the present invention comprises a precious metal and alumina and/or zeolite supported on a three-dimensional structure, and has peaks for not less than three different pore sizes in a pore size distribution measured by the mercury intrusion method, wherein one of the peaks is a peak 2 at a pore size of not less than 0.3 ?m and less than 1.0 ?m, and the pore volume of the peak 2 being greater than 3.1% of the total pore volume.

Abstract: The invention relates to a particle filter, which comprises a wall flow filter and SCR-active material, wherein the wall flow filter comprises ducts which extend in parallel between the first and the second end of the wall flow filter and which are alternately closed in a gas-tight manner either at the first or the second end and which are separated by porous walls, the pores of which have inner surfaces, and the SCR-active material is located in the form of a coating on the inner surfaces of the pores of the porous walls, characterized in that the coating has a gradient, such that the side of the coating facing the exhaust gas has a higher selectivity in the SCR reaction than the side of the coating that faces the inner surfaces of the pores. The SCR-active material is preferably a small-pore zeolite, which has a maximum ring size of eight tetrahedral atoms and is exchanged with copper and/or iron.

Abstract: The present invention relates to a particle filter which comprises a wall-flow filter and SCR-catalytically active material, wherein the wall-flow filter comprises ducts which extend in parallel between a first and a second end of the wall-flow filter and which are alternately closed off in gas-type fashion either at the first or at the second end and which are separated by porous walls, and wherein the SCR-active material comprises a zeolite which is exchanged with copper and/or iron and which is situated in the form of a coating in the porous walls of the wall-flow filter, characterized in that the SCR-catalytically active coating comprises palladium.

Abstract: The invention relates to a diesel oxidation catalyst which has a support body with a length L extending between a first end face a and a second end face b and catalytically active material zones A, B, and C arranged on the support body, wherein—material zone A contains palladium or platinum and palladium in a weight ratio of Pt:Pd of ?1 and an alkaline earth metal and extends over 20 to 80% of the length L starting from the end face a, material zone B contains ceroxide, is free of platinum, and extends over 20 to 80% of the length L starting from the end face b, material zone C contains platinum or platinum and palladium in a weight ratio of Pt:Pd of ?5, and neither material zone A nor material zone C is arranged over material zone B.

Abstract: The present invention relates to a particle filter which comprises a wall-flow filter and SCR-catalytically active material, wherein the wall-flow filter comprises ducts which extend in parallel between a first and a second end of the wall-flow filter and which are alternately closed off in gas-type fashion either at the first or at the second end and which are separated by porous walls, and wherein the SCR-active material comprises a zeolite which is exchanged with copper and/or iron and which is situated in the form of a coating in the porous walls of the wall-flow filter, characterized in that the SCR-catalytically active coating comprises palladium.

Abstract: The present invention relates to a catalyst comprising a support body A having a length LA designed as a flow substrate, a support body B of length LB designed as a wall-flow filter, and material zones A1, A2, B1, and B2, wherein the support body A comprises material zones A1 and A2 and the support body B comprises material zones B1 and B2, wherein material zone A1 contains a cerium oxide, an alkaline earth metal compound and/or an alkali metal compound, and also platinum and/or palladium, and material zone A2 contains cerium oxide, and also platinum and/or palladium, and is free of alkali metal and alkaline earth metal compounds, material zone B1 contains palladium supported on cerium oxide, and material zone B2 contains platinum supported on a support material.

Abstract: The invention relates to a particle filter, which comprises a wall flow filter and SCR-active material, wherein the wall flow filter comprises ducts which extend in parallel between the first and the second end of the wall flow filter and which are alternately closed in a gas-tight manner either at the first or the second end and which are separated by porous walls, the pores of which have inner surfaces, and the SCR-active material is located in the form of a coating on the inner surfaces of the pores of the porous walls, characterized in that the coating has a gradient, such that the side of the coating facing the exhaust gas has a higher selectivity in the SCR reaction than the side of the coating that faces the inner surfaces of the pores. The SCR-active material is preferably a small-pore zeolite, which has a maximum ring size of eight tetrahedral atoms and is exchanged with copper and/or iron.

Abstract: The invention relates to a diesel oxidation catalyst which has a support body with a length L extending between a first end face a and a second end face b and catalytically active material zones A, B, and C arranged on the support body, wherein—material zone A contains palladium or platinum and palladium in a weight ratio of Pt:Pd of ?1 and an alkaline earth metal and extends over 20 to 80% of the length L starting from the end face a, material zone B contains ceroxide, is free of platinum, and extends over 20 to 80% of the length L starting from the end face b, material zone C contains platinum or platinum and palladium in a weight ratio of Pt:Pd of ?5, and neither material zone A nor material zone C is arranged over material zone B.

Abstract: The invention relates to a coating suspension containing at least one platinum group metal on a support material, as well as manganese(II) carbonate, and to a method for coating a catalyst support substrate.

Abstract: The present invention provides an exhaust gas treatment system comprising an oxidation catalyst and an SCR catalyst, wherein the oxidation catalyst comprises an inert ceramic or metal honeycomb body and a catalytically active coating comprising a platinum group metal supported on a refractory support oxide and lanthanum wherein lanthanum is present in an amount of at least 13% by weight calculated as La2O3 and based on the weight of the refractory support material.

Abstract: The invention relates to a coating suspension containing at least one platinum group metal on a support material, as well as manganese(II) carbonate, and to a method for coating a catalyst support substrate.

Abstract: The present invention provides an exhaust gas treatment system comprising an oxidation catalyst and an SCR catalyst, wherein the oxidation catalyst comprises an inert ceramic or metal honeycomb body and a catalytically active coating comprising a platinum group metal supported on a refractory support oxide and lanthanum wherein lanthanum is present in an amount of at least 13% by weight calculated as La2O3 and based on the weight of the refractory support material.

Abstract: The present invention relates to a catalyst system for treatment of diesel exhaust gas, comprising, in flow direction of the exhaust gas, a nitrogen oxide storage catalyst containing a nitrogen oxide storage component and noble metal and a diesel particulate filter containing noble metal selected from the group of platinum, palladium, and platinum and palladium, characterized in that the noble metal loading of the nitrogen oxide storage catalyst is 100 to 180 g/ft3 (3.53 to 6.36 g/L) and the noble metal loading of the diesel particulate filter is 5 to 35 g/ft3 (0.18 to 1.24 g/L).

Abstract: The present invention relates to a diesel particle filter which has a coating active in oxidation catalysis and which is characterized in that said diesel particle filter comprises a material zone which removes platinum traces contained in the exhaust-gas flow, and to the use of said diesel particle filter in the purification of exhaust gases of diesel engines.

Abstract: An SCR-catalytically active diesel particle filter having a ceramic wall flow filter substrate with inflow channels, outflow channels, walls separating the inflow and outflow channels, and two coatings. The first coating is applied in inflow channels, is composed of high-melting point materials, and closes the inflow sides of pores in walls connecting the inflow channels and outflow channels to soot particles without preventing passage of gaseous exhaust gas constituents. The second coating is within the walls between inflow channels and outflow channels, and effectively catalyzes the selective reduction of nitrogen oxides when in the presence of a reducing agent. The particle filter displays excellent banking-up pressure properties combined with high filtration efficiency and good regeneration properties; and displays good aging stability of NOx conversion activity.