Catalyst and catalytic method for reducing nitrogen oxides

Details Catalyst and catalytic method for reducing nitrogen oxides Catalyst and catalytic method for reducing nitrogen oxides

B - Operations, Transporting

01

J

B01J 29/44 (2006.01) B01D 53/56 (2006.01) B01D 53/86 (2006.01) B01D 53/94 (2006.01) B01J 37/14 (2006.01)

Patent

CA 2142889

The invention concerns a catalyst of reduction of the NOX as well as to a catalytic process of reduction of the NOX. The catalyst according to the invention is constituted of a zeolite of the MFI type exchanged with between 0.3% and 2% by weight of palladium with respect to the total weight of catalyst. The catalyst and the process of the invention can be used in any catalytic process of selective reduction of the NOX and more particularly for the treatment of exhaust gases issued from vehicles functioning with natural gas.

L'invention concerne un catalyseur de réduction des NOx ainsi qu'un procédé catalytique de réduction des NOx. Le catalyseur selon l'invention est constitué d'une zéolithe de type MFI échangée avec entre 0,3 % et 2 % en poids de palladium par rapport au poids total du catalyseur. Le catalyseur et le procédé de l'invention peuvent être utilisés dans tout procédé catalytique de réduction sélective des NOx et plus particulièrement pour le traitement des gaz d'échappement issus des véhicules fonctionnant au gaz naturel.

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