Catalysts to reduce nox in an exhaust gas stream and methods...

Details Catalysts to reduce nox in an exhaust gas stream and methods... Catalysts to reduce nox in an exhaust gas stream and methods...

B - Operations, Transporting

01

D

B01D 53/94 (2006.01) B01J 23/40 (2006.01) B01J 23/50 (2006.01) F01N 3/08 (2006.01)

Patent

CA 2664403

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 a catalyst comprising silver on a particulate alumina support, the silver having a diameter of less than about 20 nm. Methods of manufacturing catalysts are described in which ionic silver is impregnated on particulate hydroxylated alumina particles.

L'invention concerne des catalyseurs, des systèmes et des procédés pour réduire les émissions d'oxyde d'azote d'un moteur à combustion interne. Dans un mode de réalisation de cette invention, un système de traitement d'émissions conçu pour un gaz d'échappement comprend un catalyseur comportant de l'argent sur un support constitué de particules d'alumine, les particules d'argent présentant un diamètre inférieur à approximativement 20 nm. Cette invention se rapporte en outre à des procédés de production desdits catalyseurs, consistant à imprégner d'argent ionique les particules d'alumine hydroxylées.

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