Exhaust gas purifying catalyst and an exhaust gas purifying meth

Details Exhaust gas purifying catalyst and an exhaust gas purifying meth Exhaust gas purifying catalyst and an exhaust gas purifying meth

1991-10-24

1993-08-24

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

Gallium containing

4232132, 423239, B01J 2906, B01J 2308

Patent

active

052388905

ABSTRACT:
The catalyst for purifying an exhaust gas has at least gailium and a zeolite and an exhaust gas purifying method using the catalyst. Nitrogen oxides in the exhaust gas are reduced and eliminated by the catalyst in an oxidative atmosphere at a reaction temperature of 200.degree. to 800.degree. C. and under the presence of a hydrocarbon at the total THC concentration/NO.sub.x concentration of from 0.5 to 50.

REFERENCES:
patent: 3067002 (1962-12-01), Reid, Jr.
patent: 3181928 (1965-05-01), Frilette et al.
patent: 4175057 (1979-11-01), Davies et al.
patent: 5085840 (1992-02-01), Held et al.

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