Catalyst for treating exhaust gas from an internal combustion en

Details Catalyst for treating exhaust gas from an internal combustion en Catalyst for treating exhaust gas from an internal combustion en

1979-08-06

1980-11-11

Shine, W. J.

Compositions

X-ray or neutron shield

252472, 4232135, B01J 2344, B01J 2346, B01J 2364, B01J 2374

Patent

active

042331889

ABSTRACT:
This invention is directed to an equilibrium catalyst for treating oxides of nitrogen, carbon monoxide and unburned hydrocarbons found in an exhaust gas stream from an internal combustion engine. The catalyst includes a substrate, a selective three-way equilibrium catalyst, an oxygen storage material component for maintaining the activity of the equilibrium catalyst during momentary excursions of the exhaust gas stream into oxygen rich conditions, an active metal component for a water gas and steam reforming process which maintains the overall activity of the equilibrium catalyst when treating an exhaust gas stream deficient in oxygen, and a component for oxidation of hydrocarbons and carbon monoxides when the exhaust gas stream is developed from the burning of air mixtures of about stoichiometric proportions.

REFERENCES:
patent: 3895093 (1975-07-01), Weidenbach et al.
patent: 4006103 (1977-02-01), Meguerian et al.

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