Method for removing nitrogen oxides from gases

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

B - Operations, Transporting

01

D

23/353

B01D 53/14 (2006.01) B01D 53/34 (2006.01) B01D 53/56 (2006.01) C01C 1/18 (2006.01)

Patent

CA 2013554

ABSTRACT Method for removing nitrogen oxides from gases in which, at first, the molar ratio between NO and NO2 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 NO2, to inject NO2 into the gas in a controlled manner, said NO2 having been formed by the reaction between ammonium nitrate with a strong acid.

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