Exhaust gas purifying catalyst and method for purifying...

Details Exhaust gas purifying catalyst and method for purifying... Exhaust gas purifying catalyst and method for purifying...

B - Operations, Transporting

01

J

B01J 29/80 (2006.01) B01D 53/94 (2006.01) B01J 29/82 (2006.01) B01J 29/40 (2006.01) B01J 29/46 (2006.01) B01J 29/70 (2006.01) B01J 29/76 (2006.01)

Patent

CA 2506470

An exhaust gas purifying catalyst has a catalytic component including copper, ZSM-5, and .beta. zeolite. This exhaust gas purifying catalyst reduces nitrogen oxides even from low temperature range and exhibits durability even under a thermal load of high temperature.

L'invention concerne un catalyseur pour l'épuration des gaz d'échappement comprenant un composant catalytique contenant du cuivre, une ZMS-5 et une zéolithe bêta. L'invention concerne également un procédé d'épuration des gaz d'échappement de moteurs diesel, faisant intervenir ce catalyseur. L'utilisation de ce catalyseur pour l'épuration des gaz d'échappement produits par des moteurs à combustion interne, tels que des moteurs à combustion diesel, permet, d'une part, de réduire la concentration d'oxydes d'azote, y compris dans des gaz d'échappement à basse température, et, d'autre part, de réduire sensiblement la détérioration du catalyseur, y compris lorsqu'une charge thermique de haute température est appliquée.

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