煤与稻壳共热解热重分析及动力学  

Thermogravimetric analysis and kinetics on co-pyrolysis of coal and rice husk

作　　者：严东[1] 周敏[1] 宋利强[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《化学工程》2012年第9期60-63,68,共5页Chemical Engineering(China)

摘　　要：利用热重分析仪对长焰煤和稻壳分别单独及按不同掺混比例进行热质量损失实验研究。通过比较煤与稻壳共热解热质量损失曲线和计算得到的理论曲线发现,添加稻壳对共热解过程有促进作用,在不同的稻壳掺混比例下,共热解过程质量损失率和最大质量损失速率均较理论值有不同程度的增大,推测稻壳掺混对共热解存在促进作用,促进作用与稻壳掺混比例不成线性关系。对煤与稻壳及共热解过程进行动力学分析,获得了反应活化能和频率因子,分析计算热解动力学参数表明共热解过程存在动力学补偿效应。The long flame coal and the rice husk were co-pyrolyzed in a thermogravimetric analyzer to investigate the pyrolysis performance of each material, as well as their mixtures. The comparison of the thermogravimetric analysis （TGA） curves by testing and the theoretical curves by calculating shows that the adding of rice husk has a certain role in promoting co-pyrolysis process, and with the different coal/rice husk mixing ratio, the mass loss rate and the maximum mass loss rate of the co-pyrolysis process both increase in different extent compared with the theoretical values. It is speculated that there is the synergistic effect in co-pyrolysis of coal/rice husk, and the synergy has nonlinear relationship with the rice husk blend ratio. Through the kinetic analysis of the coal, the rice husk and the co-pyrolysis process, the activation energy and the frequency factor were obtained. It reveals that there is a kinetic compensation effect in the co-pyrolysis process by analysis.

关 键 词：煤 稻壳 共热解 协同效应 反应动力学 

分 类 号：TQ530.2[化学工程—煤化学工程]