Method for removing nitrogen oxides from exhaust gases

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

B - Operations, Transporting

01

D

23/353

B01D 53/34 (2006.01) B01D 53/56 (2006.01)

Patent

CA 1068879

Abstract of the Disclosure Industrial exhaust gas containing nitrogen oxides is treated with an aqueous solution of an iron chelate complex salt which contains essentially a sulfite salt at the time of treat- ment whereby nitrogen oxides which have been difficult to catch can be absorbed with a high absorbing rate even when the concen- tration of nitrogen oxides is low in the exhaust gas or sulfur dioxide is included in the gas, and simultaneous desulfurizing can be attained in this case. Said aqueous solution has a large absorbing capacity and includes essentially one or more ions selected from alkali metal, alkali earth metal and ammonium ions.

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