Process for removal of nitrogen oxides from waste gas

Details Process for removal of nitrogen oxides from waste gas Process for removal of nitrogen oxides from waste gas

1977-03-14

1978-10-10

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

252455R, B01D 5300

Patent

active

041197038

ABSTRACT:
A process for the removal of nitrogen oxides from a waste gas containing said nitrogen oxides in conjunction with sulfur oxides is disclosed, which process comprises allowing said waste gas to come into contact with ammonia as the reducing agent at temperature in the range of from 250.degree. to 550.degree. C in the presence of a catalyst wherein an active component containing iron or copper as the active metal is supported on a silica-alumina type carrier containing not less than 60% by weight of silica and the pore volume occupied by the pores measuring 150 A or over in diameter exceeds 0.15 cc/g, for thereby causing selective catalytic reduction of said nitrogen oxides.

REFERENCES:
patent: 3008796 (1961-11-01), Andersen et al.
patent: 3279884 (1966-10-01), Nonnenmacher
patent: 3705231 (1972-12-01), Biberacher
patent: 3895094 (1975-07-01), Carter
patent: 4010328 (1977-03-01), Shiraishi et al.

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