半焦制铸造型焦热解动力学分析  

Pyrolysis Kinetic Analysis of Foundry Formed Coke Prepared by Semi-Coke

作　　者：武建军[1] 祁娟[1] 周国莉[1] 高致远[1] 祖静茹[1] 乔军[1] 

机构地区：[1]中国矿业大学化工学院,江苏徐州221116

出　　处：《中国矿业大学学报》2009年第5期675-680,共6页Journal of China University of Mining & Technology

基　　金：高等学校博士学科点专项科研基金项目(20060290506)

摘　　要：以半焦、烟煤、气煤、沥青为原料,消除内、外扩散影响的基础上利用热重分析仪获得失重曲线,并通过3种动力学方法计算出活化能,分析了动力学特征.Friedman分析法和Ozawa-Fly-nn-Wall(OFW)法得到了活化能的变化趋势,前者更为可靠,DAEM模型得到了和Friedman分析法相近的结果.结果表明:整个炭化过程中升温速率越快,失重越快,但终温时,型焦残余量与升温速率无关.对半焦制铸造型焦的热解动力学分析结果表明:混合料的热解不是简单的一级反应,在转化率0.1~0.6范围内(204~481℃),反应的活化能在116.27~363.22 kJ/mol之间;转化率大于0.6后,反应的活化能降低到100 kJ/mol左右,活化能的变化可为型焦生产中焖炉工艺和升温制度提供依据.The semi-coke,gas coal,soft coal and pitch were used as raw materials,the thermoanalysis curves were obtained by a thermogravimetric apparatus with free of both internal and external diffusion.Kinetic parameters including activation energy were evaluated by three different methods.The relationship between activation energy and conversion ratio can be determined by a Friedman method and Ozawa-Flynn-Wall(OFW) method,and the result by the former are more credible.The activation energy obtained by DAEM method a...

关 键 词：半焦 铸造型焦 热解 动力学 

分 类 号：TK121[动力工程及工程热物理—工程热物理]