Abstract:
composição de moldagem termoplástica, uso das composições de moldagem termoplásticas, e, folha, ou peça de moldagem. um filtro de fusilagem catalisado é fornecido em que seu revestimento de entrada compreende um catalisador de oxidação que compreende platina (pt) e opcionalmente paládio (pd), e seu revestimento de saída compreende um catalisador de oxidação que compreende pd e opcionalmente pt. a concentração de pt no revestimento de saída é menor do que aquela no revestimento de entrada. a razão em peso de pt:pd no revestimento de saída é na faixa de 0:1 a 2:1. o revestimento de entrada e o revestimento de saída estão presentes no substrato de fluxo de parede em uma razão de carga de revestimento na faixa de 0,5 a 1,5 g/polegada ^ 3^ (30,5 a 61kg/cm ^ 3^), calculada como razão da carga do revestimento de entrada (e g/polegada ^ 3^ (1 g/polegada ^ 3^ = 61 kg/(cm)): carga o revestimento de saída (em g/polegada ^ 3^ (1 g/polegada ^ 3^ = 61kg/(cm ^ 3^)).
Abstract:
Un filtro de hollín catalizado, que comprende un sustrato de flujo de pared que comprende un extremo de entrada, un extremo de salida, una longitud axial de sustrato que se extiende entre el extremo de entrada y el extremo de salida, y una pluralidad de pasajes definidos por paredes internas del sustrato de filtro de flujo de pared; en el que la pluralidad de pasajes comprende pasajes de entrada que tienen un extremo de entrada abierto y un extremo de salida cerrado, y pasajes externos que tienen un extremo de entrada cerrado y un extremo de salida abierto; en el que las paredes internas de los pasajes de entrada comprenden un recubrimiento de entrada que se extiende desde el extremo de entrada hasta un extremo de recubrimiento de entrada, definiendo así una longitud de recubrimiento de entrada, en el que la longitud del recubrimiento de entrada es x % de la longitud axial del sustrato, con 0
Abstract:
La presente invención se refiere a un catalizador para la oxidación de diesel (DOC) estratificado, que consiste en: a) un sustrato portador; b) un material catalítico para la oxidación de diesel que consiste en: b1) una primera capa colocada sobre el sustrato portador, la primera capa consistente en paladio impregnado sobre un material de soporte que contiene cerio en una cantidad de al menos 45% en peso, con base en el peso total del material de soporte, y como una opción contiene paladio; b2) una segunda capa colocada sobre la primer capa, la segunda capa consiste en paladio y platino cada uno impregnado sobre un material de soporte que consiste en un óxido metálico; en donde la relación en peso de platino a paladio de la primera capa es menor que la relación en peso de platino a paladio de la segunda capa.
Abstract:
The present invention relates to a nitrogen oxide storage catalyst comprising: a substrate; a first washcoat layer provided on the subtstrate, the first washcoat layer comprising a nitrogen oxide storage material, a second washcoat layer provided on the first washcoat layer, the second washcoat layer comprising a hydrocarbon trap material, wherein the hydrocarbon trap material comprises substantially no element or com- pound in a state in which it is capable of catalyzing selective catalytic reduction, preferably wherein the hydrocarbon trap material comprises substantially no element or compound in a state in which it is capable of catalyzing a reaction wherein nitrogen oxide is reduced to N2, said catalyst further comprising a nitrogen oxide conversion material which is either comprised in the second washcoat layer and/or in a washcoat layer provided between the first washcoat layer and the second washcoat layer.
Abstract:
Described is a process for the preparation of a catalyst comprising the steps of: (i) providing one or more support materials; (ii) providing one or more polymers on the support material; and (iii) providing one or more metals on the one or more supported polymers; wherein in step (ii) the one or more polymers do not comprise cross-linked polymers and/or polymers which have been reacted with a cross-linking agent. Also described is a catalyst obtained or obtainable according to said process, as well as the use of the catalyst, in particular in a method for the treatment of automobile engine exhaust gas.
Abstract:
A layered diesel oxidation catalyst (DOC) comprises: a) a carrier substrate; b) a diesel oxidation catalytic material comprising bl)a first layer located on the carrier substrate, the first layer comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight% based on the total weight of the support material, and optionally comprising platinum; b2) a second layer located on the first layer, the second layer comprising palladium and platinum each impregnated on a support material comprising a metal oxide; wherein the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
Abstract:
Described is a catalyzed soot filter wherein the inlet coating of the filter comprises an oxidation catalyst comprising platinum (Pt) and optionally palladium (Pd), wherein the outlet coating of the filter comprises an oxidation catalyst comprising Pd and optionally Pt, wherein the Pt concentration in the outlet coating is lower than the Pt concentration in the inlet coating and wherein the weight ratio of Pt:Pd in the outlet coating is in the range of from 0:1 to 2:1; and wherein the inlet coating and the outlet coating are present on the wall flow substrate at a coating loading ratio in the range of from 0.5 to 1.5, calculated as ratio of the loading of the inlet coating (in g/inch3 (g/(2.54 cm)3)):loading of the outlet coating (in g/inch3 (g/(2.54 cm)3)). Systems include such catalyzed soot filters, methods of diesel engine exhaust gas treatment and methods of manufacturing catalyzed soot filters are also described.