Removal of nitrogen oxides and sulfur oxides by ammonia

摘要: When exhaust gas from a coal-burning boiler containing NOx as well SOx is subjected to removal by catalytic reduction of the with ammonia and coal ashes contained in are separated, contaminated certain quantity ammonium compounds produced excessively used. The decomposed into sulfur compound heating hot at temperature restricted range, viz. 350° 700° C., thereby release preferentially compound. thus released recycled step.