煤炭转化2025，Vol.48Issue(6)：41-52,12.DOI:10.19726/j.cnki.ebcc.202506004
准东煤加氢热解反应特性研究
Reaction charactistics of Zhundong coal during hydropyrolysis
摘要
Abstract
To address the unclear correlation mechanism between coal molecular structural evolution and volatile release characteristics of Zhundong coal during hydropyrolysis,a pressurized fixed-bed reactor was employed to investigate the effects of temperature(600℃-800℃)and pressure(0.1 MPa-3 MPa)on the product distribution(gas,tar,and char)and composition.The evolution of surface functional groups and graphitization degree of pyrolysis char was analyzed via FTIR and Raman spectroscopy to elucidate the role of hydrogenation conditions on the pyrolysis process of Zhun-dong coal.The results reveal that hydropyrolysis reduces char yield while increasing tar and carbon-containing hydrocarbon gas yields.In addition,it enhances the formation of light aromatics(monocy-clic and bicyclic aromatics)and phenols compounds in tar.High temperature notably promotes meth-ane production,with methane yield at 800℃increasing by 3.4 times compared to that at 600℃.Fur-thermore,high pressure favors the generation of C2 and light tar,as a result,the proportion of light aromatics and phenols in the tar increases from 43.7%at 0.1 MPa to 85.2%at 3.0 MPa,and the C2 yield is 3.1 times higher than at atmospheric pressure.FTIR and Raman analysis results show that elevating temperature more effectively accelerates the removal of surface functional groups and cleav-age of aromatic units in coal char via H radical action,thus significantly increasing methane yield.Moreover,increasing pressure enhances the diffusion of H radicals,thereby inhibiting the formation of amorphous carbon from the small-molecule radicals generated during coal pyrolysis and facilitating their conversion into light tar and C2 molecules.关键词
准东煤/加氢热解/反应特性/产物分布/半焦结构演化Key words
Zhundong coal/hydropyrolysis/reaction characteristics/products distribution/char structural evolution分类
化学化工引用本文复制引用
朱国荣,胡东海,曹国强,李春玉,赵建涛,房倚天..准东煤加氢热解反应特性研究[J].煤炭转化,2025,48(6):41-52,12.基金项目
中国科学院战略性先导科技专项项目(XDA29050600). （XDA29050600）
