AMASULF


AMASULF : A two-stage process for removing hydrogen sulfide and ammonia from coke oven gas. In the first stage, hydrogen sulfide is removed by scrubbing with aqueous ammonia; the resulting ammonium sulfide solution is heated in another vessel to expel the hydrogen sulfide: H2S + 2NH4OH + (NH4)2S + 2H2O. In the second stage, ammonia is removed by scrubbing with water: (NH4)2S + H2O + H2S + 2NH4 OH. (Check source for accuracy of chemical formula)
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