Process for catalytic vapor phase reduction of nitrogen oxides a

Details Process for catalytic vapor phase reduction of nitrogen oxides a Process for catalytic vapor phase reduction of nitrogen oxides a

1978-01-12

1980-02-12

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01D 5334

Patent

active

041883659

ABSTRACT:
A catalyst composition for the vapor phase reduction of nitrogen oxides with ammonia, which consists essentially of a non-noble transition metal compound supported on a shaped carrier comprising a titanium oxide and a clay mineral having an average particle size of 0.1 to 100 microns. The shaped carrier preferably contains an additional component which is an inorganic fibrous material, silica hydrogel, silica sol, or a mixture of at least two of these. An exhaust gas containing nitrogen oxides is treated, with a high percent NO removal, by contacting it with the catalyst composition in the presence of ammonia gas at 200.degree. to 600.degree. C.

REFERENCES:
patent: 3752773 (1973-08-01), Duke et al.
patent: 3885019 (1975-05-01), Matsushita et al.
patent: 3972834 (1976-08-01), Washburne
patent: 4010238 (1977-03-01), Shiraishi et al.
patent: 4048112 (1977-09-01), Matsushita et al.
patent: 4113660 (1978-09-01), Abe et al.

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