Catalyst for purifying exhaust gas

Details Catalyst for purifying exhaust gas Catalyst for purifying exhaust gas

1991-12-12

1993-05-04

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

And group viii containing

502 66, B01J 2910

Patent

active

052081982

ABSTRACT:
A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from an oxygen-rich exhaust gas containing nitrogen oxides, carbon monoxide and hydrocarbons, comprising (i) a zeolite having an SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio of at least 15 and (ii) (a) cobalt, (b) an alkaline earth metal and (c) silver, or nickel and/or zinc, or platinum and/or manganese, or copper and/or rhodium, incorporated thereinto.

REFERENCES:
patent: 4980052 (1990-12-01), Green et al.
patent: 5041272 (1991-08-01), Tamura et al.
patent: 5078981 (1992-01-01), Kagawa
patent: 5085840 (1992-02-01), Held et al.
Sekiyu Gakkaishi 34, 375-390, Removal of Nitrogen Monoxide over Copper Ion-Exchanged Zeolite Catalysts vol. 34, No. 5, 1991.

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