Catalyst for reducing nitrogen oxides

Details Catalyst for reducing nitrogen oxides Catalyst for reducing nitrogen oxides

1977-06-06

1979-02-06

Shine, W. J.

Compositions

X-ray or neutron shield

252471, 252472, 252474, 423239, B01J 2334, B01J 2372, B01J 2386

Patent

active

041383680

ABSTRACT:
A catalyst for reducing nitrogen oxides is prepared by shaping into granules a naturally produced inorganic powdery substance composed predominantly of .alpha.-Fe.sub.2 O.sub.3 alone or in mixture with one or more of metals selected from Groups I-b, V-a, VI-a,VII-a and VIII of the periodic Table or compounds thereof, and thereafter subjecting the granules to a heat treatment. This catalyst can be used for reductively eliminating dilute nitrogen oxides in exhaust gas by bringing the exhaust gas and a reducing agent into contact with the catalyst.

REFERENCES:
patent: 3767764 (1973-10-01), Dolbeak
patent: 3945947 (1976-03-01), Sakai et al.
patent: 4003976 (1977-01-01), Komatsu etal.

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