Catalyst for purifying exhaust gas

Details Catalyst for purifying exhaust gas Catalyst for purifying exhaust gas

1993-05-17

1994-10-25

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

And additional al or si containing component

502 64, 502 66, B01J 2910, B01J 2920

Patent

active

053589165

ABSTRACT:
A catalyst for purifying exhaust gas, comprising a zeolite carrier having a mole ratio of SiO.sub.2 /Al.sub.2 O.sub.3 of from 20 to 200, and a compound oxide of copper and silicon supported on the carrier. The catalyst has high activity for elimination of nitrogen oxides (NO.sub.x) even in the presence of both oxygen and water vapor, and also has excellent durability at high temperatures. The catalyst is therefore effective in eliminating nitrogen oxides from exhaust gases from automobiles, boilers and the like.

REFERENCES:
patent: 5149511 (1992-09-01), Montreuil et al.
patent: 5155077 (1992-10-01), Montreuil et al.
patent: 5179053 (1993-01-01), Subramanian et al.

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