Abstract:
Se provee un catalizador, preferiblemente para el uso en reducción catalítica selectiva (SCR). Dicho catalizador comprende una o más zeoltias del tipo de estructura MFI, y una o más zeolitas del tipo de estructura BEA, en donde al menos parte de la una o más zeolitas del tipo de estructura MFI y al menos parte de la una o más zeolitas del tipo de estructura BEA respectivamente contienen hierro (Fe). Además, se provee un sistema de tratamiento de gas de combustión que comprende dicho catalizador así como un proceso para el tratamiento de una corriente de gas que comprende NOx usando dicho catalizador también.
Abstract:
Se provee un catalizador, preferiblemente para el uso en reducción catalítica selectiva (SCR). Dicho catalizador comprende una o más zeoltias del tipo de estructura MFI, y una o más zeolitas del tipo de estructura CHA, en donde al menos parte de la una o más zeolitas del tipo de estructura MFI contiene hierro (Fe), y en donde al menos parte de la una o más zeolitas del tipo de estructura CHA contiene cobre (Cu). Además, se provee un sistema de tratamiento de gas de combustión que comprende dicho catalizador así como un proceso para el tratamiento de una corriente de gas que comprende NOx usando dicho catalizador también.
Abstract:
A catalyst is provided, preferably for the use in selective catalytic reduction (SCR).Said catalyst comprises one or more zeolites of the MFI structure type, and one or more zeolites of the BEA structure type, wherein at least part of the one or more zeolites of the MFI structure type and at least part of the one or more zeolites of the BEA structure type respectively contain iron (Fe). Furthermore, provided are an exhaust gas treatment system comprising said catalyst as well as a process for the treatment of a gas stream comprising NOX using said catalyst as well.
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:
A catalyst is provided, preferably for the use in selective catalytic reduction (SCR). Said catalyst comprises one or more zeolites of the MFI structure type, and one or more zeolites of the CHA structure type, wherein at least part of the one or more zeolites of the MFI structure type contains iron (Fe), and wherein at least part of the one or more zeolites of the CHA structure type contains copper (Cu). Furthermore, provided are an exhaust gas treatment system comprising said catalyst as well as a process for the treatment of a gas stream comprising NOX using said catalyst as well.