How is H2S formed during coal gasification? ?
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Sulfur in coal exists mainly in the form of organic compounds, FeS2, and MSO4. But how does it react to produce H2S? I would appreciate some guidance from those who are experts in this area! ! Thank you! !
FeS2 + O2 = Fe2O3 + SO2; MSO4 + O2 = MOX + SO3 (partial decomposition). Gas produced from coal contains hydrogen and water vapor, creating a strongly reducing atmosphere; under high temperature and pressure, all sulfur-containing compounds such as SO2, COS, and CS2 can be reduced to H2S. (1) SO2 + 3H2 = H2S + 2H2O; (2) COS + H2O = H2S + CO2; (3) CS2 + 2H2O = 2H2S + CO2
But we can think about it: in the process of gas production, oxidative atmospheres and reducing atmospheres must be clearly separated; otherwise, unimaginable consequences will occur! ! During the blowing phase, the vast majority of the SO2 generated through oxidation ends up in the blowing gas; by the time gas production takes place, usually only very little SO2 remains ； Furthermore, even during the process of gas production and nitrogen addition simultaneously, steam is usually introduced in the morning and stopped in the evening, while air is added in the evening and stopped in the morning; therefore, the formation of H2S must be quite difficult! ! But in our syngas, the main form of S is H2S – how should this be understood? ? ? This post was last edited by icerain on 2007-12-14 13:44]