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:
The present invention relates to a nitrogen oxide storage catalyst comprising: a substrate; a first washcoat layer disposed on the substrate, the first washcoat layer comprising metal oxide support particles and a nitrogen oxide storage material comprising at least one metal compound selected from the group consisting of alkaline earth meta! compounds, alkali metal compounds, rare earth metal compounds, and mixtures thereof, at least a portion of said at least one metal compound being supported on the metal oxide support particles; and a second washcoat layer disposed over the first washcoat layer, said second washcoat layer comprising Rh, wherein the first washcoat layer contains substantially no Rh, and wherein the second washcoat layer is disposed on 100 - x % of the surface of the first washcoat layer, x ranging from 20 to 80.
Abstract:
The present invention relates to a catalyst comprising a substrate and a catalyst coating, the catalyst coating comprising two or more layers, said layers comprising: (a) a first layer provided on the substrate, said first layer comprising Pt and/or Pd; and (b) a second layer provided on the first layer, said second layer comprising Pt; the first and second layers each further comprising: one or more particulate support materials; one or more oxygen storage component (OSC) materials; and one or more nitrogen oxide storage materials comprising one or more elements selected from the group of alkali and/or alkaline earth metals, wherein the total amount of alkali and alkaline earth metals comprised in the one or more nitrogen oxide storage materials contained in the catalyst ranges from 0.18 to 2.5 g/in³ calculated as the respective alkali metal oxides M 2 O and alkaline earth metal oxides MO, as well as to a method for the production of a catalyst, and to a process for the treatment of a gas stream comprising nitrogen oxide, in particular of an exhaust gas stream resulting from an internal combustion engine.
Abstract:
Nitrogen oxide storage catalysts comprising a substrate and at least two coating layers, where the second layer is substantially free of platinum, cerium and barium, and methods of manufacturing and using these nitrogen oxide storage catalysts are disclosed.
Abstract:
catalisador, método para produzir um catalisador, processo para o tratamento de uma corrente de gás, e, uso do catalisador. a presente invenção refere-se a um catalisador contendo um substrato e um revestimento de catalisador, o revestimento de catalisador compreendendo, duas ou mais camadas, ditas camadas contendo; (a) uma primeira camada posicionada sobre o substrato, dita primeira camada compreendendo pd e rh; e (b) uma secunda camada aplicada sobre a primeira camada, dita segunda camada contendo pt e/ou pd; as primeira e segunda camadas contendo cada uma adicionalmente: um ou mais materiais de suporte particulados; um ou mais materiais de componente de armazenagem de oxigênio (osc); e um ou mais materiais de armazenagem de óxido de nitrogênio contendo um ou mais elementos selecionados do grupo de metais alcalinos e/ou alcalino-terrosos, sendo que a quantidade total de metais alcalinos e alcalino-terrosos, sendo que a quantidade total de metais alcalinos e alcalino-terrosos contida nos um ou mais materiais de armazenagem de óxido de nitrogênio contidos no catalisador varia de 0,18 a 2,0 g/164,4 cm^ 3^ calculada como os respectivos óxidos de metal alcalino m~ 2~o e óxidos de metal alcalino-terroso mo, bem como a um método para produção de um catalisador, e a um processo para o tratamento de uma corrente de gás, especialmente de uma corrente de gás de escape resultante de um motor de combustão interna.
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.