不同煤化程度煤热解过程中汞释放规律  

Release of mercury in the pyrolysis of coal with different ranks

作　　者：程宏飞[1,2] 梁明[1] 梁汉东[1,2] 张文海[1] CHENG Hongfei;LIANG Ming;LIANG Handong;ZHANG Wenhai(School of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China;State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100083, China)

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]煤炭资源与安全开采国家重点实验室,中国矿业大学(北京),北京100083

出　　处：《煤田地质与勘探》2017年第3期32-36,共5页Coal Geology & Exploration

基　　金：北京市自然科学基金项目(8164062);国家自然科学基金项目(41371449,41602171);北京市科技新星计划项目(xx2015B081);北京市优秀人才计划项目(2014000020124G164)~~

摘　　要：采用热重与测汞仪联用技术,对5种不同煤化程度的煤进行氧化热解实验,研究不同煤化程度煤的热解过程及煤中汞的释放规律。结果表明:X射线衍射(XRD)曲线中衍射峰的特征可反应煤化程度,衍射峰的高度越高,宽度越窄,煤化程度就越高。不同煤化程度的煤在氧气中热解,质量损失随煤化程度的加深而增大,且随着煤化程度的加深,氧化热解的起始温度、最大热分解温度、终止温度也逐渐升高。随着煤化程度的升高,煤中汞释放所需的时间逐渐增加,且汞释放最大值所对应的热重(TG)曲线热解率最大的温度随煤化程度的加深而升高。By combining thermogravimetric(TG)and mercury analyzer analysis5different rank coal's oxidation pyrolysis,the different rank coal's pyrolysis and mercury release behavior was studied.The results show that the XRD characteristics diffraction peaks can show coalification degree,the higher diffraction peak intensity and the narrower the peak width,the higher coalification degree is.Different coalification degree's coal burning in oxygen,the mass losses increased with metamorphic grade,and with the increase of coalification degree,combustion oxidation onset temperature,the maximum thermal decomposition temperature and the final temperature gradually increased.With the increase of coal metamorphism,the release time of mercury in coal gradually extended,and the maximum mercury release rate corresponding to the maximum mass loss temperature increased.

关 键 词：煤阶 氧化热解 热重 汞释放 

分 类 号：P618.11[天文地球—矿床学]