Catalysts for selective catalytic reduction denox technology

Details Catalysts for selective catalytic reduction denox technology Catalysts for selective catalytic reduction denox technology

1989-09-21

1992-08-11

Dees, Carl F.

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

Zeolite or clay, including gallium analogs

Clay

502217, 502309, 502350, B01J 2106, B01J 2116, B01J 2316

Patent

active

051378558

ABSTRACT:
Catalysts for the selective catalytic reduction of NOx by ammonia are made from porous formed supports having a certain fraction of the pores with pore diameters larger than 600 Angstrom units. Thus macropores can be introduced in a formed TiO.sub.2 support by adding burnout materials prior to forming the titania into the formed support. Then conventional DeNOx catalytic metals are added. Barium sulfate can be added to the surface of the porous inorganic oxide to make an improved support.

REFERENCES:
patent: 4085193 (1978-04-01), Nakajima et al.
patent: 4351811 (1982-09-01), Matsuda et al.
patent: 4833113 (1989-05-01), Imanari et al.
patent: 4859439 (1989-08-01), Rikimaru et al.
patent: 4891348 (1990-01-01), Imanari et al.
patent: 4929586 (1990-05-01), Hegedus et al.

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