Catalysts for the purification of exhaust gas

Details Catalysts for the purification of exhaust gas Catalysts for the purification of exhaust gas

1992-12-22

1993-09-28

Shine, W. J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502304, 4232135, B01J 2104, B01J 2310, B01J 2344, B01J 2346

Patent

active

052486508

ABSTRACT:
A catalyst for the purification of exhaust gas comprises a combination of palladium carried on cerium oxide and palladium carried on alumina, or further rhodium carried on alumina, in which a weight ratio of palladium carried on cerium oxide to palladium carried on alumina is 2:8-8:2. Preferably, the cerium oxide contains at least one of zirconium, lanthanum, neodymium and praseodymium, or the alumina contains at least one of zirconium, lanthanum, neodymium, cerium, strontium and barium. This catalyst develops excellent purification performances against exhaust gas of oxidizing atmosphere to reducing atmosphere.

REFERENCES:
patent: 4782038 (1988-11-01), Gandhi et al.
patent: 5057483 (1991-10-01), Wan
patent: 5063192 (1991-11-01), Murakami et al.
patent: 5147842 (1992-09-01), Funabiki et al.

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