Method of reducing NO.sub.x present in an exhaust to harmless N.

Details Method of reducing NO.sub.x present in an exhaust to harmless N. Method of reducing NO.sub.x present in an exhaust to harmless N.

1976-09-07

1978-01-24

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

252472, B01D 5334

Patent

active

040704408

ABSTRACT:
A method for reducing NO.sub.x gas contained in an exhaust gas to harmless N.sub.2 gas with NH.sub.3 gas using an iron oxide catalyst, characterized in that said iron oxide catalyst comprises a substance consisting essentially of hematite crystals (.alpha.-Fe.sub.2 O.sub.3), and the peak intensity of X-rays diffracted on the (110) plane of the lattice of said crystal has a ratio of 0.6 to about 1.0 to that of X-rays diffracted on the (104) plane of said crystal lattice.

REFERENCES:
patent: 3839224 (1974-10-01), Yowehara et al.
patent: 3953575 (1976-04-01), Gidaspow
patent: 3959400 (1976-05-01), Mizuno et al.
patent: 4003711 (1977-01-01), Hishinuma et al.
Stein et al.; Industrial & Engineering Chem.; vol. 52, No. 8.; Aug. 1960.

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