太原理工大学学报2026，Vol.57Issue(3)：500-509,10.DOI:10.16355/j.tyut.1007-9432.20250633
煤高温热解过程中氯的释放特性研究
Characteristics of Chlorine Release from Coal Pyrolysis at High-Temperatures
摘要
Abstract
[Purposes]As a by-product of coking enterprises in China,crude benzene commonly exhibits fluctuations and exceedances in chlorine content.The characteristics of coal significantly im-pact the migration and transformation behavior of chlorine.[Methods]On the basis of the structural characteristics of coal and the distributions of chlorine forms,release behavior of chlorine during cok-ing coal pyrolysis was analyzed.The effects of secondary reaction temperature and residence time of volatile on the chlorine release process were also investigated.[Results]The results indicate that chlo-rine in organic forms in coal is released more readily.Coal samples with higher organic chlorine con-tent have more complete chlorine release under the same pyrolysis conditions.The chlorine content of pyrolysis gas and tar from Liulin coal is 44.20%and 53.67%,respectively(with a chlorine release rate of 97.87%).This is because the organic chlorine in coal is primarily bound to the coal structure via co-valent bonds and/or coordinations with alkaline and oxygen-containing functional groups.It is there-fore easily decomposed and converted into HCl or organic chlorides.However,the chlorine release rate for Inner Mongolian coal is only 85.01%,which is due to the presence of metallic components,such as calcium and magnesium.These metallic components can react with HCl to form relatively sta-ble inorganic chlorides.Compared with residence time,the secondary reaction temperature of volatiles has a more significant impact on chlorine release.Macromolecular compounds(e.g.,C13H19Cl,C20H12Cl2)undergo cleavage to form chlorine-containing free radicals.Then,they are converted into HCl and lower-carbon-number chlorinated substances(e.g.,C2H2Cl2O,C2H2Cl4)after combining with hydrogen-rich free radicals.There is interactive migration behaviour between these two forms of organic chloride and HCl.关键词
煤热解/氯形态/释放特性/二次反应/热解温度Key words
coal pyrolysis/chlorine form/release characteristics/secondary reaction/pyrolysis temperature分类
化学化工引用本文复制引用
薛丹,张艳强,闫伦靖,范润汉,白天育,鲍卫仁,王美君,廖俊杰,常丽萍..煤高温热解过程中氯的释放特性研究[J].太原理工大学学报,2026,57(3):500-509,10.基金项目
国家自然科学基金(22578307) （22578307）
山西省科技成果转化引导专项(202304021301042) （202304021301042）
山西省省筹资金资助回国留学人员科研项目(2024-039) （2024-039）
山西梗阳新能源有限公司技术开发项目(GYXNY[2024]135) （GYXNY[2024]135）
