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It is generally considered that the thermochemical sulfate reduction is one of the main origins of high content of hydrogen sulfide (H2S). Thermochemical sulfate reduction simulation experiments at different temperatures ranging from 200°C to 600°C were carried out to study the output of gaseous products, which include CO2, CH4, H2S, and heavy hydrocarbon (C2-6). Thermochemical sulfate reduction can promote the formation of CH4 and H2S, and can preferentially consume heavy hydrocarbons. The CH4 is difficult to participate in the reaction of formation H2S. The concentrations of CO2 and hydrogen are closely related to the evolution characteristics of H2S. The intermediate sulfur-containing products from thermochemical reaction and thermal cracking of coals can promote the progress of thermochemical sulfate reduction and possible formation of H2S.
PAPER REVISED: 2019-09-21
PAPER ACCEPTED: 2019-09-21
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