Removal of hydrogen sulfide (H2S) in hydrogen sulfide-containing mixed gas containing excess steam and ammonia

摘要

The present invention relates to a process for removing hydrogen sulphide from a hydrogen sulphide-containing mixed gas containing excess water vapor and ammonia, and more particularly to a process for removing hydrogen sulphide from a hydrogen sulfide-containing gas mixture comprising about 60-70 vol% water vapor, about 15-20 vol% ammonia, (H₂S) and other inert gases is oxidized with air or oxygen on a heterogeneous catalyst to produce hydrogen sulfide (H₂S) with elemental sulfur (S) and ammonium thiosulfate (NH₄)₂S₂O₃), And recovering the hydrogen sulfide in the mixed gas. One preferred application of the invention involves the use of H₂S is a process waste using ammonia water as an absorbent and is to pretreat the mixed gas to be incinerated in an ammonia incinerator.