Abstract: A NOx adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOx adsorber catalyst comprises a first layer consisting essentially of a support material, one or more platinum group metals disposed on the support material, and a NOx storage material.

Abstract: A NOx adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOx adsorber catalyst composition comprises a support material, one or more platinum group metals disposed on the support material, and a NOx storage material.

Abstract: A NOx adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOx adsorber catalyst comprises a first layer consisting essentially of a support material, one or more platinum group metals disposed on the support material, and a NOx storage material.

Abstract: A NOx adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOx adsorber catalyst comprises a first layer consisting essentially of a support material, one or more platinum group metals disposed on the support material, and a NOx storage material.

Abstract: A NOx adsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOx adsorber catalyst composition comprises a support material, one or more platinum group metals disposed on the support material, and a NOx storage material.

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: A NOx absorber catalyst comprising a substrate monolith coated with one or more washcoat layers and comprising a first component comprising a nitrogen oxide storage component, at least one precious metal and a dispersed rare earth oxide supported on a refractory support material, and a second component comprising a precious metal supported on a bulk reducible oxide that is substantially free of nitrogen oxide storage material, wherein the precious metal present in the second component comprises Pt, Pd or a combination of both Pt and Pd and wherein the bulk reducible oxide is an oxide, a composite oxide or a mixed oxide comprising at least one of manganese, iron, cobalt, copper, tin or cerium.

Abstract: An exhaust system for treating exhaust gas from an internal combustion engine is disclosed. The system comprises a three-way catalyst (TWC), a fuel reformer catalyst located downstream of the TWC, and a fuel supply means located upstream of the fuel reformer catalyst. The exhaust gas is split into two portions. The first portion of the exhaust gas bypasses the TWC and contacts the fuel reformer catalyst in the presence of fuel added from the fuel supply means, and is then recycled back to the engine intake. The second portion of the exhaust gas is contacted with the TWC and is then utilized to heat the fuel reformer catalyst before being expelled to atmosphere. The exhaust system allows for maximum heat exchange from the exhaust gas.

Abstract: An exhaust system for treating exhaust gas from an internal combustion engine is disclosed. The system comprises a three-way catalyst (TWC), a fuel reformer catalyst located downstream of the TWC, and a fuel supply means located upstream of the fuel reformer catalyst. The exhaust gas is split into two portions. The first portion of the exhaust gas bypasses the TWC and contacts the fuel reformer catalyst in the presence of fuel added from the fuel supply means, and is then recycled back to the engine intake. The second portion of the exhaust gas is contacted with the TWC and is then utilized to heat the fuel reformer catalyst before being expelled to atmosphere. The exhaust system allows for maximum heat exchange from the exhaust gas.

Abstract: A method of reducing nitrogen oxides (NOx) in a flowing combustion exhaust gas to N2, which method comprising oxidizing nitrogen monoxide to nitrogen dioxide on a transition metal/elite catalyst at catalyst bed temperatures below 50° C. and reducing NOx with the catalyst using an hydrocarbon (HC) reductant at catalyst bed temperatures below 150° C.

Abstract: A dual function catalytic filter is provided having a soot filter with an inlet and an outlet, a soot oxidation layer on the inlet, wherein the soot oxidation layer comprises a soot oxidation catalytic component consisting essentially of at least one transition metal dispersed on a cerium and zirconium mixed and/or composite oxide, wherein the at least one transition metal is selected from the group consisting of W, Cr, Ce, Mn, Fe, Co, Ni, Cu, and combinations thereof, and an SCR layer coated on the outlet, wherein the SCR layer comprises an SCR catalytic component. Also provided are methods for removing NOx and soot from a lean burn exhaust gas using the dual function catalytic filter.

Abstract: A NOx absorber catalyst comprising a substrate monolith coated with one or more washcoat layers and comprising a first component comprising a nitrogen oxide storage component, at least one precious metal and a dispersed rare earth oxide supported on a refractory support material, and a second component comprising a precious metal supported on a bulk reducible oxide that is substantially free of nitrogen oxide storage material, wherein the precious metal present in the second component comprises Pt, Pd or a combination of both Pt and Pd and wherein the bulk reducible oxide is an oxide, a composite oxide or a mixed oxide comprising at least one of manganese, iron, cobalt, copper, tin or cerium.

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: Methods and apparatus for producing hydrogen with reforming catalysts. The reforming catalysts may be platinum group metals on a support material, and they may be located in a reforming reaction zone of a primary reactor. The support material may be an oxidic support having a ceria and zirconia promoter, or may include a neodymium stabilizer. The support material may also include at least one Group IA, Group IIA, manganese, or iron metal promoter. The primary reactor may have a first and second reforming reaction zones, where upstream catalysts located in the first reforming reaction zone and downstream catalysts located in the second reforming reaction zone may be selected to perform optimally under the conditions in their respective reforming reaction zone.

Abstract: An OBD system that diagnoses on board the condition of NOx adsorber catalysts in diesel engines and that relies on existing mass-produced exhaust gas oxygen sensor, also known as lambda sensor, technology, and the following established phenomena. In a reducing environment, typical exhaust gas oxygen (lambda) sensors have different sensitivities to various reductants, with sensitivity decreasing in this order: H2>CO>short-chain hydrocarbons>long-chain hydrocarbons. In the process of regeneration of the NOx adsorber catalyst, the original reductant may evolve into a different reductant species, e.g., via reactions such as a water-gas shift (WGS), a reforming, a partial oxidation, etc. This leads to a difference in exhaust gas oxygen sensor readings between the inlet to the catalyst and outlet from the catalyst. It has been observed in diesel engine testing that the ability of the NOx adsorber catalyst to perform such a reductant evolution is correlative to the catalyst's NOx reduction capability.

Abstract: A method of reducing nitrogen oxides (NOx) in a flowing combustion exhaust gas to N2, which method comprising oxidising nitrogen monoxide to nitrogen dioxide on a transition metal/elite catalyst at catalyst bed temperatures below 50° C. and reducing NOx with the catalyst using an hydrocarbon (HC) reductant at catalyst bed temperatures below 150° C.

Abstract: Methods and apparatus for producing hydrogen are provided. The methods and apparatus utilize reforming catalysts in order to produce hydrogen gas. The reforming catalysts may be platinum group metals on a support material, and they may be located in a reforming reaction zone of a primary reactor. The support material may an oxidic support having a ceria zirconia promoter. The support material may be an oxidic support and a neodymium stabilizer. The support material may also be an oxidic support material and at least one Group IA, Group IIA, manganese, or iron metal promoter. The primary reactor may have a first and second reforming reaction zones. Upstream reforming catalysts located in the first reforming reaction zone may be selected to perform optimally under the conditions in the first reforming reaction zone. Downstream reforming catalysts located in the second reforming reaction zone may be selected to perform optimally under the conditions in the second reforming reaction zone.

Abstract: An OBD system that diagnoses on board the condition of NOx adsorber catalysts in diesel engines and that relies on existing mass-produced exhaust gas oxygen sensor, also known as lambda sensor, technology, and the following established phenomena. In a reducing environment, typical exhaust gas oxygen (lambda) sensors have different sensitivities to various reductants, with sensitivity decreasing in this order: H2>CO>short-chain hydrocarbons>long-chain hydrocarbons. In the process of regeneration of the NOx adsorber catalyst, the original reductant may evolve into a different reductant species, e.g., via reactions such as a water-gas shift (WGS), a reforming, a partial oxidation, etc. This leads to a difference in exhaust gas oxygen sensor readings between the inlet to the catalyst and outlet from the catalyst. It has been observed in diesel engine testing that the ability of the NOx adsorber catalyst to perform such a reductant evolution is correlative to the catalyst's NOx reduction capability.

Abstract: A method of cleaning a filter component comprises subjecting the component to an atmosphere of superheated steam at a pressure of a least 0.5 bar in a vessel and subsequently decompressing the vessel to achieve a pressure reduction of at least 0.5 bar in at most 5 seconds. The method is particularly useful for the cleaning of filter components that have been used for the filtration of molten polymer (e.g. polyester) and which are at least partially blocked by solidified polymer.

Abstract: Methods and apparatus for producing hydrogen are provided. The methods and apparatus utilize reforming catalysts in order to produce hydrogen gas. The reforming catalysts may be platinum group metals on a support material, and they may be located in a reforming reaction zone of a primary reactor. The support material may an oxidic support having a ceria zirconia promoter. The support material may be an oxidic support and a neodymium stabilizer. The support material may also be an oxidic support material and at least one Group IA, Group IIA, manganese, or iron metal promoter. The primary reactor may have a first and second reforming reaction zones. Upstream reforming catalysts located in the first reforming reaction zone may be selected to perform optimally under the conditions in the first reforming reaction zone. Downstream reforming catalysts located in the second reforming reaction zone may be selected to perform optimally under the conditions in the second reforming reaction zone.