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.
Abstract:
A catalyst is provided, preferably for the use in selective reduction (SCR). Said catalyst comprises one or more zeolite 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.
Abstract:
catalisador, sistema de tratamento de gás de escape, e, processo para o tratamento de uma corrente de gás. um catalisador é fornecido, preferivelmente para o uso na redução catalítica seletiva (scr). o dito catalisador compreende um ou mais zeólitos do tipo de estrutura mfi e um ou mais zeólitos do tipo de estrutura bea, em que pelo menos parte do um ou mais zeólitos do tipo de estrutura mfi e pelo menos parte do um ou mais zeólitos do tipo de estrutura bea respectivamente contêm ferrp (fe). além disso, é fornecido um sistema de tratamento de gás de escape que compreende o dito catalisador, bem como um processo para o tratamento de uma corrente de gás que compreende no~ x~ também utulizando-se o dito catalisador.
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.
Abstract:
xThe present invention relates to a catalyst preferably for use in selective catalytic reduction (SCR) said catalyst comprising one or more zeolites of the BEA structure type one or more zeolites of the CHA structure type and optionally one or more zeolites of the MFI structure type wherein at least part of the one or more zeolites of the BEA structure type contain iron (Fe) wherein at least part of the one or more zeolites of the CHA structure type contain copper (Cu) and wherein at least part of the optional one or more zeolites of the MFI structure type contain iron (Fe). Furthermore the present invention concerns an exhaust gas treatment system comprising said catalyst as well as a process for the treatment of a gas stream comprising NO using said catalyst as well.
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:
catalisador armazenador de óxido de nitrogênio, sistema de tratamento para uma corrente de gás de escape de automóvel, e, método para o tratamento de gás de escape de motor de automóvel. a presente invenção se refere a um catalisador armazenador de óxido de nitrogênio compreendendo: um substrato; uma primeira camada de revestimento reativo aplicada sobre o substrato, a primeira camada de revestimento reativo compreendendo um material armazenador de óxido de nitrogênio, uma segunda camada de revestimento reativo aplicada sobre a primeira camada de revestimento reativo, a segunda camada de revestimento reativo compreendendo um material capturador de hidrocarboneto, em que o material capturador de hidrocarboneto substancialmente não contém elemento ou composto em um estado no qual ele é capaz de catalisar redução catalítica seletiva, preferivelmente em que o material capturador de hidrocarboneto substancialmente não contém elemento ou composto em um estado no qual ele é capaz de catalisar uma reação na qual óxido de nitrogênio é reduzido para n~ 2~, dito catalisador adicionalmente compreendendo um material de conversão de óxido de nitrogênio que está igualmente contido na segunda camada de revestimento reativo e/ou em uma camada de revestimento reativo aplicada entre a primeira camada de revestimento reativo e a segunda camada de revestimento.
Abstract:
Described is a catalyst comprising a washcoat including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and physical mixtures or chemical combinations thereof, including atomically doped combinations. Also described is a catalyst comprising a first washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms, the first washcoat zone being substantially free of platinum group metal; and a second washcoat zone including copper or iron on a small pore molecular sieve material having a maximum ring size of eight tetrahedral atoms physically mixed with platinum or platinum and rhodium on a refractory metal oxide support including alumina, silica, zirconia, titania, and physical mixtures or chemical combinations thereof, including atomically doped combinations. Methods and systems for treating emissions are also described.