Suitability of Coal Slags for Cost-Effective Reduction of Hydrogen Sulfide

摘要

Six types of coal slags were tested for H_2S retention in a TGA reactor under conditions simulating modern coal gasifiers (850-1000°C and 0.7-1.1 vol% H_2S). XRD and SEM/EDS analysis showed that iron in the slag was responsible for H_2S abatement in the form of CaS. The slag reactivity for H_2S capture was found to increase with its Fe wt% and ranged from 7 to 30% at 850°C and in 1.1% H_2S. Findings also showed that the slag reactivity was much more enhanced by decreasing its particle size than by rising the sulfidation temperature.