Method of preparation of catalyst and catalyst prepared by the m

Details Method of preparation of catalyst and catalyst prepared by the m Method of preparation of catalyst and catalyst prepared by the m

1985-07-08

1987-05-19

Shine, W. J.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

423239, B01J 2384

Patent

active

046668829

ABSTRACT:
A catalyst for removing nitrogen oxides from an exhaust gas comprises a composite oxide or mixture of niobic acid or niobium oxide with iron oxide or hydrated iron oxide. The catalyst contains atoms of niobium and atoms of iron in a ratio Nb/Fe not exceeding about 1. The catalyst is useful for converting nitrogen oxides in an exhaust gas to nitrogen gas by contacting the exhaust gas with the catalyst in the presence of a reducing gas, such as ammonia. The catalyst can be prepared by impregnation or coprecipitation.

REFERENCES:
patent: 4138368 (1979-02-01), Kiyomiya et al.
patent: 4329517 (1982-05-01), Taniguchi et al.

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