Nitrogen oxide removing catalysts

Details Nitrogen oxide removing catalysts Nitrogen oxide removing catalysts

1996-07-26

1999-01-26

Yildirim, Bekir L.

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

502 71, 502 77, 502242, 502247, 502248, 502254, 502255, 502312, 502321, 502322, 502323, 502390, 502351, 502353, 502354, 502355, 502305, 4232391, 4232392, B01J 3500, B01J 2100, B01J 2300, B01J 2940

Patent

active

058638555

ABSTRACT:
This invention relates to a catalyst for removal of nitrogen oxides in an exhaust gas by adding ammonia to the exhaust gas and hydrogenating catalytically wherein said catalyst is in a two-layered structure comprising a lower layer which is a molded article consisting of components having denitration activity covered with an upper layer which has a abrasion resistance lower than that of the lower layer and which is a coating of particulate components having 2 peaks in its particle size distribution within the range from 0.1 to 50 .mu.m.

REFERENCES:
patent: 4294806 (1981-10-01), Abe et al.
patent: 4771026 (1988-09-01), Kainer et al.
patent: 4891348 (1990-01-01), Imanari et al.
patent: 4892716 (1990-01-01), Abe et al.
patent: 4935392 (1990-06-01), Kainer et al.
patent: 5064792 (1991-11-01), Jaras et al.

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