Abstract: The present disclosure relates to oxidation catalyst compositions comprising a platinum group metal (PGM) component comprising palladium, platinum, or a combination thereof; a manganese component; and a first refractory metal oxide support material comprising zirconia; catalytic articles; and exhaust gas treatment systems, as well as methods of making and using such oxidation catalyst compositions, for example, to reduce formaldehyde levels in engine exhaust emissions.

Abstract: The present invention relates a system for the treatment of an exhaust gas of a diesel combustion engine, said system comprising a specific NOx adsorber component, a diesel oxidation catalyst (DOC) component, a selective catalytic reduction (SCR) component, a gas heating component, and a reductant injector, wherein in said system, the specific NOx adsorber component is arranged upstream of the gas heating component, the reductant injector is arranged up-stream of the SCR component, the gas heating component is arranged upstream of the reductant injector, the DOC component is arranged upstream of the reductant injector, and the DOC component and the gas heating component are directly consecutive components. Further, the present invention relates a process for preparing such a system and use thereof.

Abstract: The present disclosure relates to oxidation catalyst compositions comprising a platinum group metal (PGM) component comprising palladium, platinum, or a combination thereof; a first oxide chosen from oxides of cerium, silicon, iron, cobalt, zinc, chromium, molybdenum, nickel, tungsten, magnesium, antimony, tin, lead, yttrium, and combinations thereof; and a first refractory metal oxide support material; catalytic articles; and exhaust gas treatment systems, as well as methods of making and using such oxidation catalyst compositions.

Abstract: Described herein are coatings. The coatings can, for example, catalyze carbon gasification. In some examples, the coatings comprise: a first region having a first thickness, the first region comprising a manganese oxide, a chromium-manganese oxide, or a combination thereof; a second region having a second thickness, the second region comprising Ni, Fe, W, Cr, Co, Mn, Ti, Mo, V, Nb, Zr, Si, C, or a combination thereof; and an alkaline earth metal, an alkaline earth oxide, an alkaline earth carbonate, an alkaline earth silicate, molybdemun, a molybdenum oxide, a molybdenum carbide, a mixed-metal perovskite, a mixed metal inorganic oxide, or a combination thereof.

Abstract: The present disclosure is directed to an emission treatment system for oxidation of hydrocarbons and carbon monoxide and for NOx abatement in an exhaust stream of a lean burn engine, the emission treatment system including a low-temperature NOx adsorber (LT-NA) that includes a molecular sieve impregnated with at least one PGM component positioned in fluid communication with the exhaust stream; and an oxidation catalyst that includes a refractory metal oxide support containing manganese impregnated with platinum positioned in fluid communication with the exhaust stream, each of the LT-NA and the oxidation catalyst being disposed on a substrate. The invention provides a catalyst article combining an oxidation catalyst with a LT-NA and a related method of treatment of an exhaust gas.

Abstract: Described herein are coatings. The coatings can, for example, catalyze carbon gasification. In some examples, the coatings comprise: a first region having a first thickness, the first region comprising a manganese oxide, a chromium-manganese oxide, or a combination thereof; a second region having a second thickness, the second region comprising Ni, Fe, W, Cr, Co, Mn, Ti, Mo, V, Nb, Zr, Si, C, or a combination thereof; and an alkaline earth metal, an alkaline earth oxide, an alkaline earth carbonate, an alkaline earth silicate, molybdemun, a molybdemn oxide, a molybdemn carbide, a mixed-metal perovskite, a mixed metal inorganic oxide, or a combination thereof.

Abstract: The present disclosure generally provides an emission treatment system for at least partial conversion of gaseous CO emissions. The exhaust gas treatment system includes various components such as a first catalyst component selected from a LNT or an oxidation catalyst for the abatement of HC and CO, which contains a catalyst composition such as a platinum group metal component impregnated into a refractory oxide material. Another component in the exhaust gas treatment system is an SCR catalyst for the abatement of NOx, which contains a catalyst composition such as a metal ion-exchanged molecular sieve and can be optionally absent when the first catalyst component is an LNT. A second oxidation catalyst for further abatement of CO is also part of the emission treatment system and includes a third catalyst composition selected from a platinum group metal component, a base metal oxide component, or combinations thereof disposed onto a carrier substrate.

Abstract: An oxidation catalyst composition is provided, the composition including at least one platinum group metal impregnated onto a porous alumina material, wherein the porous alumina material comprises a copper-alumina spinel phase. At least a portion of the copper-alumina spinel phase can be proximal to, or in direct contact with, at least one platinum group metal crystallite, such as a crystallite having a size of about 1 nm or greater. The close proximity of the copper-alumina spinel phase to the platinum group metal crystallite is believed to provide synergistic enhancement of carbon monoxide oxidation. Methods of making and using the catalyst composition are also provided, as well as emission treatment systems comprising a catalyst article coated with the catalyst composition.

Abstract: Catalytic and/or sorptive articles comprising a metal fiber felt, the metal felt having an array of metal fibers and voids and a catalyst composition and/or a sorbent composition disposed on the metal fibers and within the voids are described. Such articles can be highly effective towards the abatement of pollutants in exhaust gas streams from internal combustion engines.

Abstract: The present disclosure generally provides an emission treatment system for at least partial conversion of gaseous CO emissions. The exhaust gas treatment system includes various components such as a first catalyst component selected from a LNT or an oxidation catalyst for the abatement of HC and CO, which contains a catalyst composition such as a platinum group metal component impregnated into a refractory oxide material. Another component in the exhaust gas treatment system is an SCR catalyst for the abatement of NOx, which contains a catalyst composition such as a metal ion-exchanged molecular sieve and can be optionally absent when the first catalyst component is an LNT. A second oxidation catalyst for further abatement of CO is also part of the emission treatment system and includes a third catalyst composition selected from a platinum group metal component, a base metal oxide component, or combinations thereof disposed onto a carrier substrate.

Abstract: An oxidation catalyst composite, methods and systems for the treatment of exhaust gas emissions from an advanced combustion engine, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) from a diesel engine and an advanced combustion diesel engine are disclosed. More particularly, washcoat compositions are disclosed comprising at least two washcoat layers, a first washcoat comprising a palladium component and a first support containing cerium and a second washcoat containing platinum and one or more molecular sieves.

Abstract: An oxidation catalyst composite, methods and systems for the treatment of exhaust gas emissions from an advanced combustion engine, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) from a diesel engine and an advanced combustion diesel engine are disclosed. More particularly, washcoat compositions are disclosed comprising at least two washcoat layers, a first washcoat comprising a palladium component and a first support containing cerium and a second washcoat containing platinum and one or more molecular sieves.

Abstract: An oxidation catalyst composite, methods and systems for the treatment of exhaust gas emissions from an advanced combustion engine, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO) and the reduction of nitrogen oxides (NOx) from a diesel engine and an advanced combustion diesel engine are disclosed. More particularly, washcoat compositions are disclosed comprising at least two washcoat layers, a first washcoat comprising a palladium component and a first support containing cerium and a second washcoat containing platinum and one or more molecular sieves.

Abstract: Described are catalyst compositions, catalytic articles, methods of manufacturing catalytic articles and exhaust gas treatment systems and methods that utilize the catalytic articles. The catalytic articles include a washcoat of platinum group metal on refractory oxide support particles, and further including a molecular sieve wherein greater than 90% of the molecular sieve particles have a particle size greater than 1 ?m.

Abstract: A catalyst material for the oxidation of NO comprising a catalyst carrier including a ceria-alumina support having platinum and optionally palladium dispersed on the support is described. When palladium is present, the ratio of platinum to palladium by weight is at least 1:1. The amount of ceria in the support is in the range of 1% to 12% by weight. The catalyst material is useful for methods and systems of abating pollutants from automotive exhaust gas from lean burn engines.

Abstract: Described are catalyst compositions, catalytic articles, exhaust gas treatment systems and methods that utilize the catalytic articles. The catalyst composition comprises a washcoat including a zeolite, refractory metal oxide support particles, and a platinum group metal supported on the refractory metal oxide support particles. Greater than 90% of the refractory metal oxide particles supporting PGM have a particle size greater than 1 ?m and a d50 less than 40 microns.

Abstract: The present invention relates to a diesel oxidation catalyst comprising a carrier substrate, and a first washcoat layer disposed on the substrate, the first washcoat layer comprising palladium supported on a support material comprising a metal oxide, gold supported on a support material comprising a metal oxide, and a ceria comprising compound, as well as a process for the preparation of such catalyst.

Abstract: Described are catalyst compositions, catalytic articles, methods of manufacturing catalytic articles and exhaust gas treatment systems and methods that utilize the catalytic articles. The catalyst composition comprises an oxidation catalyst comprising a washcoat layer including a platinum group metal supported on a refractory metal oxide support and porous molecular sieve particles having internal pores, the molecular sieve particles protected by a protecting material selected from an organic wax encapsulating the molecular sieve particles, a polymer encapsulating the molecular sieve particles, an inorganic oxide deposited on the surface of the molecular sieve particles, or an organic compound filling the internal pores of the molecular sieve particles, wherein the protecting material prevents interaction of the molecular sieve particles with the platinum group metal.

Abstract: Described are catalyst compositions, catalytic articles, exhaust gas treatment systems and methods that utilize the catalytic articles. The catalyst composition comprises a washcoat including a zeolite, refractory metal oxide support particles, and a platinum group metal supported on the refractory metal oxide support particles. Greater than 90% of the refractory metal oxide particles supporting PGM have a particle size greater than 1 ?m and a d50 less than 40 microns.

Abstract: A catalyst material for the oxidation of NO comprising a catalyst carrier including a ceria-alumina support having platinum and optionally palladium dispersed on the support is described. When palladium is present, the ratio of platinum to palladium by weight is at least 1:1. The amount of ceria in the support is in the range of 1% to 12% by weight. The catalyst material is useful for methods and systems of abating pollutants from automotive exhaust gas from lean burn engines.