Catalyst for purification of exhaust gas and method for...

B - Operations – Transporting – 01 – J

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B01J 23/58 (2006.01) B01D 53/94 (2006.01) B01J 35/04 (2006.01) B01J 35/10 (2006.01) B01J 37/02 (2006.01) B01J 37/08 (2006.01) F01N 3/10 (2006.01)

Patent

CA 2740565

A catalyst for the purification of exhaust gas that can be used to highly efficiently treat an exhaust gas which has moisture and fluctuates between an oxidizing atmosphere and a reducing atmosphere even after the catalyst is exposed to a high temperature is provided. The present invention relates to a catalyst for the purification of exhaust gas having a catalyst layer of catalyst components comprising a noble metal, magnesium oxide, and a refractory inorganic oxide formed on a three-dimensional structure, wherein the catalyst layer has two peaks originated from the magnesium oxide in a pore distribution obtained by mercury intrusion technique.

L'invention concerne un catalyseur de purification de gaz d'échappement: traitant efficacement des gaz d'échappement à teneur en eau et fluctuant entre une atmosphère oxydante et une atmosphère réductrice, même lorsque le catalyseur a été exposé à de fortes températures, et concerne spécifiquement un tel catalyseur dont la couche de catalyse, composée d'un composant catalyseur qui comporte un métal noble, de l'oxyde de magnésium et un oxyde minéral ignifuge, est formée sur une structure en 3D. Ledit catalyseur se caractérise en ce que sa couche de catalyse présente deux pics attribués à l'oxyde de magnésium dans la distribution des pores déterminés par intrusion de mercure.

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