长焰煤低温干馏失重动力学实验研究  

Experimental Study on the Weight Loss Dynamics of Low Temperature Long Flame Coal Carbonization

作　　者：张学梅[1] 李东[1] 马青华[1] 郝静远 ZHANG Xue-mei;LI Dong;MA Qing-hua;HAO Jing-yuan(Energy&Chemical Engineering Research Center,Xi’an Siyuan University,Xi’an Shannxi 710038,China;School of Chemical Engineering,Xi'an Jiaotong University,Xi’an Shannxi 710038,China)

机构地区：[1]西安思源学院能源及化工大数据应用教学研究中心,陕西西安710038 [2]西安交通大学化工学院,陕西西安710038

出　　处：《辽宁化工》2021年第12期1753-1757,共5页Liaoning Chemical Industry

基　　金：陕西省教育厅2020年一般专项科学研究计划(项目编号:20JK0858)。

摘　　要：用鄂尔多斯盆地东胜长焰煤,在定型的低温干馏炉中制备20个有不同干馏程度的兰炭样品。这些样品的区别在于是否经过恒速升温干燥脱水阶段、或恒速升温到达哪个轻微热解温度、或在特定恒温强烈热解时间的长短。通过恒温热解动力学方程先计算3个温度下强烈热解阶段的失重速率常数后,再计算强烈热解阶段的指前因子和活化能。通过恒速升温热解动力学方程分别直接计算脱水阶段和轻微热解阶段的指前因子和活化能。结果表明:在460~510℃区间的恒温强烈热解阶段的失重活化能为149.1kJ·mol^(-1),失重率最小;从室温到245℃区间的恒速升温干燥脱水阶段的失重活化能为32.3 kJ·mol^(-1),失重率次之;而从245℃开始的恒速升温轻微热解阶段的失重活化能为19.1 kJ·mol^(-1),失重率最大。Using the Dongsheng long flame coal of Ordos Basin,20 samples of semi-coke with different degrees of carbonization were prepared in a retort.The difference between these samples was whether they went through a constant heating of dehydration,or to what temperature of slightly carbonization was reached by constant heating,or to keep how long of intense carbonization isothermally.After calculating the weight loss rate constant of the intense carbonization at three temperatures,the pre-exponential factor and the activation energy were calculated.The pre-exponential factor and the activation energy of both phases of the dehydration and the slightly carbonization were calculated directly.The results showed that,the weight loss activation energy for the intense carbonization was 149.1 kJ·mol^(-1),for the dehydration was 32.3 kJ·mol^(-1),and for the slightly carbonization was 19.1 kJ·mol^(-1).

关 键 词：低温干馏热解 温度时间取样路线图 恒速升温 恒温热解 失重动力学 

分 类 号：TQ523.2[化学工程—煤化学工程]