蒙东褐煤热解特性及反应动力学研究  

Study on Characteristics and Reaction Kinetics of the East Inner Mongolia Lignite

作　　者：李文军[1] 魏家骏[1] 苏倩倩[1] 吴骏杰 

机构地区：[1]华北科技学院环境工程学院,河北燕郊065201

出　　处：《化工管理》2017年第13期78-83,共6页Chemical Engineering Management

基　　金：河北省高等学校科学技术研究项目资助(ZD2015207);中央高校基本科研业务费资助项目(3142013097;3142015025)

摘　　要：利用非等温热分析法对蒙东褐煤在氮气气氛下的热解过程进行热重分析(TG),通过分析热解得到的TG和DTG曲线来研究热解温度、升温速率对实验煤样热解特性的影响,同时利用TG-DTG手段,研究煤样的热解动力学,采用Kissinger微分法、Ozawa积分法对煤样进行热解动力特性分析,求解热解动力学参数,并推测反应机理方程F(a)。结果表明:随着热解温度的升高,褐煤挥发分产率逐渐增加;随着升温速率的升高,最大热解速度明显加大,特性指数r增大。煤样的活化能为143.84k J·mol^(-1),指前因子为A=1.39×10^(10)S^(-1);蒙东褐煤热分解为随机成核与随后成长反应机理模型。The paper investigated the combustion characteristics of the East Inner Mongolia Lignite pyrolysis under a N2 atmosphere,Using thermogravimetric analysis（ TGA ） method.The TG and DTG graph to investigate pyrolysis temperature,heating rate of experimental coal pyrolysis characteristics,while use of TG-DTG studied by means of coal pyrolysis kinetics,using the Kissinger differential method and Ozawa integral method for coal dynamic Characteristics of pyrolysis,solving the pyrolysis kinetics parameters ,and speculated that the reaction mechanism equation F（a）.The results showed that：with the increase pyrolysis temperature,the volatile component productivity increased gradually; with the increase heating rate,the maximum speed of Pyrolysis significantly increased,Characteristic exponent r increased.The activation energy of coal 143.84kJ.mol-1,the Pre- exponential factor A=1.39×10^-10S-1;The pyrolysis is random nucleation and subsequent growth of the reaction mechanism model.

关 键 词：褐煤 热解 升温速率 热重分析 动力学 

分 类 号：TQ530.2[化学工程—煤化学工程]