Catalyst for the purification of the exhaust gases of internal c

Details Catalyst for the purification of the exhaust gases of internal c Catalyst for the purification of the exhaust gases of internal c

1975-12-12

1977-12-20

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252470, 4232135, B01J 2104, B01J 2364, B01J 2386

Patent

active

040640736

ABSTRACT:
New catalysts are described which are useful over a wide temperature range for purifying exhaust gases from internal combustion engines burning gasoline. The new catalysts are of composite form comprising a water-gas type catalyst and at least one platinum group metal such as platinum, palladium or ruthenium. As water-gas catalyst, use can be made of a mixture or iron oxide and chromium oxide. By using such composite catalysts on a common refractory substrate, nitrogen oxides, carbon monoxide and unburnt hydrocarbons can be removed to a substantial degree in a single stage.

REFERENCES:
patent: 3649706 (1972-03-01), Lester
patent: 3839224 (1974-10-01), Yonehara et al.
patent: 3873471 (1975-03-01), Koberstein et al.
patent: 3881696 (1975-05-01), Lepeytre et al.

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