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B01J 23/10 (2006.01); B01J 23/00 (2006.01); B01J 23/08 (2006.01); B01J 8/02 (2006.01); B01J 8/00 (2006.01); B01D 53/56 (2006.01); B01D 53/94 (2006.01); B01D 53/86 (2006.01); C01B 21/00 (2006.01); C01B 23/00 (2006.01); C01B 25/00 (2006.01); C01B 31/00 (2006.01); C01B 33/00 (2006.01); C01B 35/00 (2006.01); C01G 28/00 (2006.01); C01G 30/00 (2006.01);

U.S. Cl.

CPC ...

Abstract

An oxidation catalyst is provided which is capable of combusting PM in a diesel engine exhaust gas at a low temperature and which has low degradation due to heat generated during combustion (i.e., has high heat resistance). A composite oxide for an exhaust gas purification catalyst is formed from Ce, Bi, R, R', and oxygen, and when the molar ratios of Ce, Bi, R, and R′ are expressed as Ce:Bi:R:R′=(1−x−y−z) :x:y:z, it satisfies 0<x≦0.4, 0<y<1.0, and 0<z≦0.5. Since this composite oxide has no change in its BET value even when treated at a high temperature, and can withstand a high amount of sulfur poisoning, retrogradation due to poisoning is low. Therefore, this exhaust gas purification catalyst is suitable as a PM combustion catalyst.

Find Patent Forward Citations

Michiaki, Yoshiyuki. (2012). Complex oxide for exhaust gas purification catalyst, production method thereof, coating material for exhaust gas purification catalyst, and diesel exhaust gas purification filter (U.S. Patent No. 8304364). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8304364

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