Catalyst for removing NO.sub.x from gas streams

Details Catalyst for removing NO.sub.x from gas streams Catalyst for removing NO.sub.x from gas streams

1980-03-04

1982-02-09

Shine, W. J.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252466J, 423239, B01J 2104, B01J 2322, B01J 2374

Patent

active

043149138

ABSTRACT:
Nitrogen oxides, NO.sub.x, are depleted/removed from oxygen-containing gas streams comprising same, by contacting an admixture of ammonia and such gas streams, at elevated temperatures, with a catalyst which comprises a catalytically active metallic oxide deposited on a porous alumina support, said support comprising a volume of pores having diameters larger than 1000 A in excess of 25 cm.sup.3 /100 g, a volume of pores having diameters larger than 300 A in excess of 40 cm.sup.3 /100 g, a total pore volume of from about 80 cm.sup.3 /100 g to 120 cm.sup.3 /100 g, and a surface area of less than 160 m.sup.2 /g, said catalytically active metallic oxide being an oxide of a metal selected from the group consisting of vanadium, iron and cobalt, and said catalytically active metal oxide comprising from 0.5 to 20% by weight of the catalyst.

REFERENCES:
patent: 3279884 (1966-10-01), Nonnenmacher et al.
patent: 3864451 (1975-02-01), Lee et al.
patent: 4164546 (1979-08-01), Welty

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