Method for removing nitrogen oxides from gases

Details Method for removing nitrogen oxides from gases Method for removing nitrogen oxides from gases

1990-04-05

1991-01-15

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423400, C01B 2100, C01B 2122, C01B 2124

Patent

active

049852175

ABSTRACT:
Method for removing nitrogen oxides from gases in which, at first, the molar ratio between NO and NO.sub.2 is set to 1 in said gas and subsequently the nitrogen oxides are absorbed in a hydrous ammonia solution, whereby ammonium nitrate is formed. In order to achieve the desired molar ratio in a simple manner, it is intended for setting the molar ratio between NO and NO.sub.2, to inject NO.sub.2 into the gas in a controlled manner, said NO.sub.2 having been formed by the reaction between ammonium nitrate with a strong acid.

REFERENCES:
patent: 3453071 (1969-07-01), Schmitt et al.
patent: 4232175 (1980-11-01), Smith et al.

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