Abstract: A catalyst with a porous, ceramic support body having a porosity which is formed by pores in at least a part of the ceramic support body, and which furthermore has a catalytically active washcoat coating applied to the ceramic support body, which catalytically active washcoat coating having a layer thickness, comprises a permanent catalytically inactive impregnation comprising at least one catalytically inactive inorganic component, and wherein the permanent inactive impregnation has a layer thickness and is present at least partially between a surface of the porous ceramic support body and the catalytically active washcoat coating is present in the pores of the ceramic support body in a region with reduced porosity underneath the surface of the ceramic support body.

Abstract: A catalyst with a porous, ceramic support body having a porosity which is formed by pores in at least a part of the ceramic support body, and which furthermore has a catalytically active washcoat coating applied to the ceramic support body, which catalytically active washcoat coating having a layer thickness, comprises a permanent catalytically inactive impregnation comprising at least one catalytically inactive inorganic component, and wherein the permanent inactive impregnation has a layer thickness and is present at least partially between a surface of the porous ceramic support body and the catalytically active washcoat coating is present in the pores of the ceramic support body in a region with reduced porosity underneath the surface of the ceramic support body.

Abstract: An SCR-active zeolite catalyst and a method for producing same. To produce the catalyst, an Fe ion-exchanged zeolite is initially subjected to a first temperature treatment within a range of 300 to 600° C. in a reducing hydrocarbon atmosphere such that the oxidation state of the Fe ions decreases and/or the dispersity of the Fe ions on the zeolite increases, whereupon the reduced zeolite is subjected to a second temperature treatment within a range of 300 to 600° C. in an oxidizing atmosphere such that hydrocarbon residues or carbon residues are oxidatively removed, the zeolite being calcined to obtain a catalyst material during the two temperature treatments. Iron contained in the zeolite is stabilized in an oxidation state of less than +3 and/or the dispersity of the Fe ions on the zeolite is permanently increased such that a high SCR activity is achieved within a temperature range of less than 300° C.

Abstract: A wall-flow filter for filtering particulate matter from a flowing exhaust gas comprises a catalyst for catalyzing both the conversion of solid carbon in the particulate matter by oxygen and the selective reduction of oxides of nitrogen in the exhaust gas with a nitrogenous reductant, which catalyst comprising optionally stabilized ceria and at least one metal selected from (i) tungsten and (ii) both tungsten and iron.

Abstract: An extruded honeycomb catalyst for nitrogen oxide reduction according to the selective catalytic reduction (SCR) method in exhaust gases from motor vehicles includes an extruded active carrier in honeycomb form having a first SCR catalytically active component and with a plurality of channels through which the exhaust gas flows during operation, and a washcoat coating having a second SCR catalytically active component being applied to the extruded body, wherein the first SCR catalytically active component and the second SCR catalytically active component are each independently one of: (i) vanadium catalyst with vanadium as catalytically active component; (ii) mixed-oxide catalyst with one or more oxides, in particular those of transition metals or lanthanides as catalytically active component; and (iii) an Fe- or a Cu-zeolite catalyst.

Abstract: An extruded honeycomb catalyst for nitrogen oxide reduction according to the selective catalytic reduction (SCR) method in exhaust gases from motor vehicles includes an extruded active carrier in honeycomb form having a first SCR catalytically active component and with a plurality of channels through which the exhaust gas flows during operation, and a washcoat coating having a second SCR catalytically active component being applied to the extruded body, wherein the first SCR catalytically active component and the second SCR catalytically active component are each independently one of: (i) vanadium catalyst with vanadium as catalytically active component; (ii) mixed-oxide catalyst with one or more oxides, in particular those of transition metals or lanthanides as catalytically active component; and (iii) an Fe- or a Cu-zeolite catalyst.

Abstract: A three way catalyst includes an extruded solid body having by weight: 10-100% of at least one binder/matrix component; 5-90% of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% optionally stabilised ceria. The catalyst also includes at least one precious metal and optionally at least one non-precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on the body surface; (ii) at least one metal is present throughout the body and at least one precious metal is carried in one or more coating layer(s) on a body surface; or (iii) at least one metal is present throughout the body, is present in a higher concentration at a body surface, and at least one precious metal is carried in one or more coating layer(s) on the body surface.

Abstract: 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 stabilized 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.

Abstract: An extruded honeycomb catalyst for nitrogen oxide reduction according to the selective catalytic reduction (SCR) method in exhaust gases from motor vehicles includes an extruded active carrier in honeycomb form having a first SCR catalytically active component and with a plurality of channels through which the exhaust gas flows during operation, and a washcoat coating having a second SCR catalytically active component being applied to the extruded body, wherein the first SCR catalytically active component and the second SCR catalytically active component are each independently one of: (i) vanadium catalyst with vanadium as catalytically active component; (ii) mixed-oxide catalyst with one or more oxides, in particular those of transition metals or lanthanides as catalytically active component; and (iii) an Fe- or a Cu-zeolite catalyst.

Abstract: 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.

Abstract: A three way catalyst includes an extruded solid body having by weight: 10-100% of at least one binder/matrix component; 5-90% of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% optionally stabilised ceria. The catalyst also includes at least one precious metal and optionally at least one non-precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on the body surface; (ii) at least one metal is present throughout the body and at least one precious metal is carried in one or more coating layer(s) on a body surface; or (iii) at least one metal is present throughout the body, is present in a higher concentration at a body surface, and at least one precious metal is carried in one or more coating layer(s) on the body surface.

Abstract: A NOx absorber catalyst comprising an extruded solid body comprises either: (A) 10-95% by weight of at least one binder/matrix component; and 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof, which catalyst comprising at least one metal comprising (a) at least one precious metal; and (b) at least one alkali metal or at least one alkaline earth metal, wherein (a) and (b) are carried in one or more coating layer(s) on a surface of the extruded solid body; or (B) 10-95% by weight of at least one binder/matrix component; and 5-80% by weight optionally stabilized ceria, which catalyst comprising at least one metal comprising (a) at least one precious metal; and (b) at least one alkali metal or at least one alkaline earth metal.

Abstract: 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 stabilized 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.

Abstract: A three way catalyst includes an extruded solid body having: 10-95% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve; and 0-80% by weight optionally stabilized ceria. The catalyst further includes at least one precious metal and optionally at least one non-precious metal. The at least one precious metal is carried in a coating layer on a surface of the extruded solid body; at least one metal is present throughout the extruded solid body and at least one precious metal is also carried in a coating layer on a surface of the extruded solid body; or at least one metal is present throughout the extruded solid body, is present in a higher concentration at a surface of the extruded solid body and at least one precious metal is also carried in a coating layer on the surface of the extruded solid body.

Abstract: An oxidation catalyst comprises 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 stabilized ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) a majority of the at least one precious metal is located at a surface of the extruded solid body; (ii) the at least one precious metal is carried in one or more coating layer(s) on a surface; (iii) at least one metal is present throughout the extruded solid body and in a higher concentration at a surface; (iv) at least one metal is present throughout the extruded solid body and in a coating layer(s) on a surface; or (v) a combination of (ii) and (iii).

Abstract: An SCR-active zeolite catalyst and a method for producing same. To produce the catalyst, an Fe ion-exchanged zeolite is initially subjected to a first temperature treatment within a range of 300 to 600° C. in a reducing hydrocarbon atmosphere such that the oxidation state of the Fe ions decreases and/or the dispersity of the Fe ions on the zeolite increases, whereupon the reduced zeolite is subjected to a second temperature treatment within a range of 300 to 600° C. in an oxidizing atmosphere such that hydrocarbon residues or carbon residues are oxidatively removed, the zeolite being calcined to obtain a catalyst material during the two temperature treatments. Iron contained in the zeolite is stabilized in an oxidation state of less than +3 and/or the dispersity of the Fe ions on the zeolite is permanently increased such that a high SCR activity is achieved within a temperature range of less than 300° C.

Abstract: 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.

Abstract: An oxidation catalyst comprises 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 precious metal and optionally at least one non-precious metal, wherein: (i) a majority of the at least one precious metal is located at a surface of the extruded solid body; (ii) the at least one precious metal is carried in one or more coating layer(s) on a surface; (iii) at least one metal is present throughout the extruded solid body and in a higher concentration at a surface; (iv) at least one metal is present throughout the extruded solid body and in a coating layer(s) on a surface; or (v) a combination of (ii) and (iii).

Abstract: A wall-flow filter for filtering particulate matter from a flowing exhaust gas comprises a catalyst for catalysing both the conversion of solid carbon in the particulate matter by oxygen and the selective reduction of oxides of nitrogen in the exhaust gas with a nitrogenous reductant, which catalyst comprising optionally stabilised ceria and at least one metal selected from (i) tungsten and (ii) both tungsten and iron.

Abstract: A three way catalyst comprises an extruded solid body comprising: 10-100% 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 precious metal and optionally at least one non-precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on a surface of the extruded solid body; (ii) at least one metal is present throughout the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on a surface of the extruded solid body; or (iii) at least one metal is present throughout the extruded solid body, is present in a higher concentration at a surface of the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on the surface of the extruded solid body.