镜煤抽提物热解特性的实验研究  

EXPERIMENTAL STUDY ON PYROLYSIS OF EXTRACT FROM VITRAIN

作　　者：刘生玉[1] 王宝俊[1] 谢克昌[1] 

机构地区：[1]太原理工大学煤科学与技术山西省和教育部重点实验室,山西太原030024

出　　处：《燃料化学学报》2003年第5期420-423,共4页Journal of Fuel Chemistry and Technology

基　　金：国家重点基础研究发展规划项目(G1999022101)~~

摘　　要：采用热重分析仪和热解 红外联用仪(Py FTIR)考察了镜煤四氢呋喃抽提物的热解过程。热重的研究结果表明:抽提物的热解失重行为与镜煤的热解失重行为有很大不同,前者有两个明显的DTG峰,190℃左右时出现一个DTG峰,在439℃出现第二个DTG峰,与镜煤相比,抽提物的失重速率显著高于镜煤,且最大失重峰向低温区移动。抽提物的热解产物中脂肪烃的释放量多于镜煤,而且脂肪烃类产物释放的温度区间小,说明脂肪烃的释放更集中和快速,但是甲烷的生成量明显少于镜煤;抽提物热解产物中有少量的CO2生成,几乎没有产生CO。The compound with low molecular weight is thought to play a key role in the structure of coals and has a significant effect on the process of coal pyrolysis The purpose of this paper is to describe the characteristic of pyrolytic process of extract The sample was obtained from vitrain extracted by tetrahydrofuran The thermal decomposition behavior of vitrain and its extract were investigated by TG and PyFTIR, the latter can continuously obtain IR spectra of the volatiles as the sample is heated The TG and DTG curves of extract are different from those of vitrain The rate of weight loss of extract is higher than that of vitrain Two peaks in DTG curve of extract were observed at 190?℃ and 452?℃ individually, while no peak was observed at 190?℃ for vitrain The maximum peak in DTG curve moves towards low temperature compared with vitrain The results of PyFTIR shows that the amounts of aliphatics evolution of extract is higher than those of vitrain, the evolution profile indicates the evolution of aliphatic compounds is fast The amounts of methane and CO2 evolution from extract were lower than those of vitrain, no CO was produced from extract

关 键 词：镜煤 抽提物 热解 低分子化合物 

分 类 号：TQ530.2[化学工程—煤化学工程]