How is H2S formed during gasification? ? ?
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How is H2S formed during gasification? ? ? 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 more knowledgeable! ! Thank you! !
When it reacts with water, it turns into inorganic sulfur
Generally, sulfur in coal is classified into four forms based on its chemical state: organic sulfur, pyrite sulfur, sulfate sulfur, and elemental sulfur. Pyrite sulfur includes pyrite (FeS2), marcasite (FeS2), sphalerite (ZnS), galena (PbS), chalcopyrite (CuFeS2), pyrrhotite (Fe1-XS), arsenicous pyrite (FeAsS), and other minerals. Since pyrite is the predominant form of pyrite sulfur, it is also referred to as pyrite sulfur； Sulfate sulfur mainly includes barite (BaSO4), gypsum (CaSO4·H2O), anhydrous gypsum (CaSO4), and some iron sulfates. Organic sulfur mainly includes thioalcohols, thioethers, organic disulfides, and heterocyclic thiophenes, among which thiophenes account for the largest proportion. Sulfur in coal is mainly of the first two types, with a very low content of elemental sulfur. In China’s coal, sulfur is primarily in the form of pyrite sulfur, followed by organic sulfur, with sulfate sulfur being the least abundant. In high-sulfur coal with an average sulfur content of 2.76%, pyrite sulfur accounts for 1.61%, representing 58.33% of the total sulfur; organic sulfur makes up 1.04%, accounting for 37.7% of the total sulfur; and sulfate sulfur amounts to 0.11%. Pyrite: FeS2 + O2 → Fe2O3 + SO2; SO2 + H2 → H2S + H2O. Thiophene: (CH4)S + O2 → CO + CO2 + H2S. These three reactions are the most representative; the equations aren’t balanced, haha. . To learn more in detail, you can search for relevant literature online; there is a great deal of it, with many scholars from home and abroad researching the generation and purification of toxic and harmful gases during the gasification process
Primarily, the sulfur in coal reacts with oxygen; the main reactions are as follows: S+O2=SO2, SO2+3H2=H2S+2H2O
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Reposting: I have already provided detailed answers to your questions. Please refer to http://bbs.hcbbs.com/viewthread.php?tid=121607&highlight=%C3%BA%C6%F8%BB%AF%B9%FD%B3%CC%D6%D0H2S%CA%C7%D4%F5%D1%F9%D0%CE%B3%C9%B5%C4. This post was last edited by Ma Hai on 2009-2-14 at 18:31