Abstract:
The present disclosure relates to a catalyzed soot filter, in particular for the treatment of Diesel engine exhaust, with a coating design which ensures soot particulates filtration, assists the oxidation of carbon monoxide (CO), and produces low H2S emissions during normal engine operations and regeneration events.
Abstract:
A catalyzed soot filter, in particular for the treatment of Diesel engine exhaust, comprises a coating design which ensures soot particulates filtration, assists the oxidation of carbon monoxide (CO), and produces low H2S emissions during normal engine operations and regeneration events.
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.
Abstract:
Provided is a catalyst composition, in particular a diesel oxidation catalyst, for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO). More particularly, the present invention is directed to a catalyst structure comprising at least two, specifically three distinct layers, at least one of which contains an oxygen storage component (OSC) that is present in a layer separate from the majority of the platinum group metal (PGM) components, such as palladium and platinum.
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:
Se describe un catalizador de oxidación para diésel para el tratamiento de emisiones de gas de escape, tal como la oxidación de hidrocarburos (HC) no quemados, y monóxido de carbono (CO) y la reducción de óxidos de nitrógeno (NOx). Más particularmente, la presente invención se refiere a una composición de capa de recubrimiento delgada que comprende una zeolita de alta relación entre sílice y alúmina, y platino y paladio, de tal modo que la zeolita minimiza las interacciones negativas de estos metales del grupo de platino con la zeolita.