Experiment of H2S Evolution during Coal Pyrolysis in Fluidized Bed

A bench-scale fluidized bed reactor is used to investigate H₂S evolution and analyze various factors influencing sulfur distribution in gas and semi-coke during coal pyrolysis. The tests results show rising temperature increases the amount of H₂S evolution and partial pressure of hydrogen enhances hydrogen sulfide release during coal decompose at 800-950°C. While apart from other researches results, effect occurs obviously on H₂S emission at 10 percent of hydrogen concentration, and the effect begins to decrease with H₂ concentration rise even to 55 percent. The partial pressure of hydrogen not only enhances directly on formation of H₂S, some reactions of H₂ with other gaseous sulfur probably may take effects.