摘要
燃煤过程中释放出的硫化物等,会对环境造成严重影响,如何控制硫化物污染是洁净煤技术的核心问题。作者分析总结煤中硫的赋存状态、地质成因煤层中H2S成因的基础上,把二者的成因模式结合起来,认为;低硫煤、特低硫煤中黄铁矿的形成是生物降解作用的结果,而与硫酸盐关系不大;我国煤中全硫含量及噻吩硫在煤中的比例,随变质程度的增高而增高。导致这种现象的一个原因可能是:煤的变质过程中,由不稳定的有机硫和黄铁矿等降解产生的硫化氢与有机质再次反应生成噻吩硫,而噻吩硫比较稳定,不易分解。
Coal combustion releases sulfide which pollutes the environment. How to control sulfide pollution is the core issue of clean coal technology. The paper analyzes the existence state of sulfur in coal and H2S in geological genesis coal seam, combines the two genetic modes, and concludes that the formation of pyrite in low sulfur coal and extreme-low sulfur coal is the result of biodegradation and has little relationship with sulfate. In China, total sulfur content and the percentage of thiophenie sulfides in coal increase with the degree of degeneration. One possible reason is： in the process of degeneration, the biodegradation of unstable organic sulfur and pyrite produces hydrogen sulfide, then the hydrogen sulfide reacts with organic matters to form thiophenic sulfide, which is rather stable and is difficult to degrade.
出处
《山西煤炭》
2010年第7期73-76,共4页
Shanxi Coal
