Regeneration of catalyst/absorber

Details Regeneration of catalyst/absorber Regeneration of catalyst/absorber

B - Operations, Transporting

01

J

B01J 23/90 (2006.01) B01D 53/94 (2006.01) B01D 53/96 (2006.01) B01J 38/04 (2006.01) F01N 3/00 (2006.01) F01N 3/08 (2006.01) F01N 3/20 (2006.01)

Patent

CA 2318860

Hydrocarbon in a carrier of nitrogen or steam is passed over a devitalized supported noble metal/alkali or alkaline earth catalyst/absorber, such as Pt on an alumina monolith coated with potassium carbonate, which has sorbed NOx from engine exhaust to restore and regenerate the devitalized catalyst/absorber for reuse. The hydrocarbon undergoes a shift reaction to produce CO in situ which is the reactant gas for the regeneration.

Sur un catalyseur/absorbeur épuisé à métal noble/alcalin ou alcalino-terreux, tel que du platine ou un monolithe d'alumine enduit de carbonate de potassium, et ayant absorbé des NOx dans l'échappement d'un moteur, on fait passer un hydrocarbure présent dans un vecteur d'azote ou de vapeur afin de restaurer et de régénérer ledit catalyseur/absorbeur en vue de sa réutilisation. Sous l'effet d'une conversion catalytique, l'hydrocarbure produit in situ du CO qui est le gaz réactif pour la régénération.

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