燃料化学学报（中英文）2026，Vol.54Issue(6)：178-186,9.DOI:10.1016/S1872-5813(26)60642-1
矿物质酸性组分对离子交换态Ca在煤热解过程中反应行为的影响机制研究
Study on the influence mechanism of acidic mineral components on the reaction behavior of ion-exchangeable Ca during coal pyrolysis
摘要
Abstract
Inherent minerals play a significant role in the thermal conversion of coal.However,the influence mechanism of the interactions among minerals on the generation of tar during coal pyrolysis remains unclear.To investigate the mechanism of the effect of acidic mineral components on the behavior of Ca2+during coal pyrolysis,several samples were prepared by HCl and HF washing and Ca2+ion exchanging.The pyrolysis behaviors of the experimental coal samples were examined in a fixed-bed reactor.During the acid washing process,the ash content was effectively reduced,while the contents of organic elements such as carbon and hydrogen were also decreased.The loading of ion-exchangeable calcium enhanced the thermal weight loss rate of the coal sample in the 500-550℃ range,and the corresponding peak temperature shifted from 530 to 514℃ for the coal without Ca.When coal was pyrolyzed at a final temperature of 600℃ with a slow heating rate,kaolinite in acidic mineral components undergoes dehydroxylation to form metakaolin,and the content of small aromatic rings(＜6 rings)in the char pyrolyzed by Ca-loaded coal sample was lower than that of the coal sample after acid washing.Due to the coexistence of acidic mineral components with ion-exchangeable Ca,the content of aliphatic hydrocarbons in the pyrolysis tar of YL-HCl-Ca reached 21.98％,significantly higher than 13.60％in the corresponding pyrolysis tar of YL-De-Ca.From the apparent results,it can be found that the acidic mineral components inhibit the adverse effect of ion exchangeable Ca2+on the lightening of coal tar.关键词
矿物质/离子交换态Ca/热解/煤焦油Key words
minerals/ion-exchangeable Ca/pyrolysis/coal tar分类
化学化工引用本文复制引用
李鸿升,郝盼,闫伦靖,孔娇,王美君,鲍卫仁,常丽萍..矿物质酸性组分对离子交换态Ca在煤热解过程中反应行为的影响机制研究[J].燃料化学学报（中英文）,2026,54(6):178-186,9.基金项目
Supported by the National Natural Science Foundation of China(22208234). （22208234）
