Method for purifying exhaust gas

Details Method for purifying exhaust gas Method for purifying exhaust gas

1994-03-28

1995-01-17

Dees, Carl F.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Mixture is exhaust from internal-combustion engine

4232135, 4232392, 4232453, 423247, B01J 806, B01D 5336, C01B 2100

Patent

active

053824164

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: 5206196 (1993-04-01), Nakano et al.
patent: 5208198 (1993-05-01), Nakano et al.
patent: 5219545 (1993-06-01), Kagana et al.
patent: 5223236 (1993-06-01), Inoue et al.
patent: 5270024 (1993-12-01), Kasahara et al.

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