Denitration catalyst and denitrating method

Details Denitration catalyst and denitrating method Denitration catalyst and denitrating method

1983-01-07

1984-08-21

Doll, John

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423244, 502217, 502309, 502340, B01J 800, C01B 2100

Patent

active

044669470

ABSTRACT:
A denitration catalyst comprising at least three metal components, (A) titanium, (B) tungsten and/or magnesium, and (C) vanadium, the titanium and tungsten being contained as oxides and the magnesium and vanadium being contained in the form of an oxide or a sulfate or both, said catalyst being composed of a porous molded article of a mixture of an oxide of component A and an oxide and/or a sulfate of component B, the atomic ratio of component B to component A being from 0.01 to 1, and a vanadium compound localized in that area of said molded article which extends from its outermost surface to a depth of 500 microns or less, the content of the vanadium compound in said area being 0.1 to 15% by weight; and a method for removing nitrogen oxides from a waste gas, which comprises contacting a waste gas containing nitrogen oxides, together with ammonia and molecular oxygen, at a temperature of 150.degree. to 650.degree. C., with the aforesaid catalyst.

REFERENCES:
patent: 4048112 (1977-09-01), Matsushita et al.
patent: 4085193 (1978-04-01), Nakajima et al.
patent: 4152296 (1979-05-01), Okabe et al.

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