Catalysts, systems and methods to reduce nox in an exhaust...

Details Catalysts, systems and methods to reduce nox in an exhaust... Catalysts, systems and methods to reduce nox in an exhaust...

B - Operations, Transporting

01

D

B01D 53/94 (2006.01) B01J 23/68 (2006.01)

Patent

CA 2664390

Catalysts, systems and methods are described to reduce NOx emissions of an internal combustion engine. In one embodiment, an emissions treatment system for an exhaust stream is provided having an SCR catalyst comprising silver tungstate on an alumina support. The emissions treatment system may be used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines. An emissions treatment system may further comprise an injection device operative to dispense a hydrocarbon reducing agent upstream of the catalyst.

L'invention concerne des catalyseurs, des systèmes et des procédés permettant de réduire les émissions de NOx d'un moteur à combustion interne. Dans un mode de réalisation, un système de traitement d'émissions pour un flux d'échappement est utilisé et comprend un catalyseur SCR qui contient du tungstate d'argent sur un support aluminium. Le système de traitement d'émissions peut être utilisé pour le traitement de flux d'échappement émis par des moteurs diesel et des moteurs essence à mélange pauvre. Un système de traitement d'émissions peut également comprendre un dispositif d'injection conçu pour distribuer un agent de réduction d'hydrocarbures en amont du catalyseur.

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