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

1993-05-07

1994-05-17

Dees, Carl F.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232132, 4232392, B01D 5334, B01J 802

Patent

active

053126084

ABSTRACT:
The catalyst for purifying an exhaust gas has at least gallium 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: 3565574 (1971-02-01), Kearby et al.
patent: 3787560 (1974-01-01), Stephens

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