Abstract: The present disclosure provides a catalyst composition comprising a catalytically active platinum group metal (PGM) component disposed on or impregnated in a magnetic ferrite support material, wherein the magnetic ferrite support material is capable of inductive heating in response to an applied alternating electromagnetic field. Further provided are catalyst articles comprising such compositions, and components comprising such catalyst articles, and further comprising a conductor associated with the catalyst article for receiving current and generating an alternating electromagnetic field in response thereto, wherein the conductor is positioned such that the generated alternating electromagnetic field is applied to at least a portion of the catalyst composition, inductively heating the catalyst composition directly at the catalytic site. Also provided are exhaust gas treatment systems including such components and/or articles, and methods of treating emissions utilizing such components and systems.

Abstract: The present disclosure provides catalyst compositions and catalytic articles capable of storing and/or reducing nitrogen oxide (NOx) emissions in engine exhaust, catalyst articles coated with such compositions, and processes for preparing such catalyst compositions and articles. The catalyst compositions include copper and palladium co-exchanged zeolites. Further provided is a process for preparing such co-exchanged zeolites, an exhaust gas treatment system including the catalytic articles disclosed herein, and methods for reducing NOx in an exhaust gas stream using such catalytic articles and systems.

Abstract: The present disclosure provides a catalyst substrate, including: a) a ceramic material and b) a magnetic material, wherein the magnetic material is capable of inductive heating in response to an applied alternating magnetic field. The magnetic material can be associated with the ceramic material in various ways (e.g., dispersed within at least a portion of the ceramic material or contained within pores of the ceramic material). The disclosure further provides a catalyst article including such a catalyst substrate and at least one catalytic washcoat layer deposited thereon. The catalyst article can be adapted for various purposes, depending on the composition of the catalytic washcoat. The disclosure also includes a system and method for heating a catalyst material, which includes the catalyst article and a conductor for receiving current and generating an alternating electromagnetic field in response thereto.

Abstract: The disclosure provides a catalyst composition that includes a catalytic material and a magnetic ferrite compound. The magnetic ferrite compound can be pretreated, for example, by heating prior to incorporation within the catalyst composition. The magnetic ferrite compound may include iron, and one or more additional metals including zinc, cobalt, nickel, yttrium, manganese, copper, barium, strontium, scandium, and lanthanum. The disclosure also includes a system and method for heating the catalyst composition, which employs a conductor for receiving current and generating an alternating magnetic field in response thereto.

Abstract: The present disclosure is directed to an emission treatment system for NOx abatement in an exhaust stream of a lean burn engine. The emission treatment system includes a lean NOx trap (LNT) in fluid communication with and downstream from the lean burn engine and a low-temperature NOx adsorber (LT-NA) in fluid communication with and downstream of the LNT. Further provided is a method for abating NOx in an exhaust stream from a lean burn engine utilizing the disclosed system.

Abstract: The present disclosure provides catalyst compositions and catalytic articles capable of storing and/or reducing nitrogen oxide (NOx) emissions in engine exhaust, catalyst articles coated with such compositions, and processes for preparing such catalyst compositions and articles. The catalyst compositions include copper and palladium co-exchanged zeolites. Further provided is a process for preparing such co-exchanged zeolites, an exhaust gas treatment system including the catalytic articles disclosed herein, and methods for reducing NO in an exhaust gas stream using such catalytic articles and systems.

Abstract: Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to aluminum ratio from about 0.25:1 to about 1:1.

Abstract: Catalysts and catalytic articles for treating exhaust gas streams are described. In one or more embodiments, a catalyst system includes a first zone to abate nitrogen oxides by selective catalytic reduction, a second zone to oxidize ammonia and a third zone to oxidize carbon monoxide and hydrocarbons. Methods for treating the exhaust gas stream are also provided. Methods of making and using such catalysts and catalytic articles are also described.

Abstract: Platinum group metal zoned ammonia oxidation catalytic articles and methods of making are described. Also described are emissions treatment systems and methods of treating an exhaust stream containing ammonia using a platinum group metal zoned ammonia oxidation catalytic article.

Abstract: Catalysts and catalytic articles for treating exhaust gas streams are described. In one or more embodiments, a catalyst system includes a first zone to abate nitrogen oxides by selective catalytic reduction, a second zone to oxidize ammonia and a third zone to oxidize carbon monoxide and hydrocarbons. Methods for treating the exhaust gas stream are also provided. Methods of making and using such catalysts and catalytic articles are also described.

Abstract: 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, VIB, 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 NOx abatement catalyst; and passing the exhaust stream exiting the NOx abatement catalyst and containing ammonia through the ammonia oxidation catalyst. Systems including such catalysts are also provided.

Abstract: Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

Abstract: Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.

Abstract: Catalysts, methods and systems for treating diesel engine exhaust streams are described. In one or more embodiments, the catalyst comprises a refractory metal oxide, a transition metal oxide, and platinum, the catalyst being effective to oxidize ammonia at temperatures less than about 300° C. and exhibiting no significant decrease in ammonia oxidation efficiency upon hydrothermal aging. Methods and systems including such catalysts are also provided.

Abstract: 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 NOx abatement catalyst; and passing the exhaust stream exiting the NOx abatement catalyst and containing ammonia through the ammonia oxidation catalyst. Systems including such catalysts are also provided.

Abstract: Zeolite catalysts and systems and methods for preparing and using zeolite catalysts having the CHA crystal structure are disclosed. The catalysts can be used to remove nitrogen oxides from a gaseous medium across a broad temperature range and exhibit hydrothermal stable at high reaction temperatures. The zeolite catalysts include a zeolite carrier having a silica to alumina ratio from about 15:1 to about 256:1 and a copper to alumina ratio from about 0.25:1 to about 1:1.