非等温热重分析研究碳气化动力学  

Study on carbon gasification kinetics using non-isothermal thermogravimetric analysis

作　　者：刘忠锁[1] 汪琦[2] 邹宗树[1] 谭广雷[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳110819 [2]辽宁科技大学材料科学与工程学院,辽宁鞍山114051

出　　处：《材料与冶金学报》2010年第1期68-71,共4页Journal of Materials and Metallurgy

基　　金：国家自然科学基金资助项目(50974071)

摘　　要：利用Labsys同步热分析仪以非等温热重分析研究了碳气化反应动力学,考察了升温速率对碳气化反应的影响.在非等温热重分析中,Doyle和Gorbatchev近似函数都可以模拟碳气化反应过程.通过对比这两个函数拟合实验数据的相关系数,确定在使用非等温热重分析研究碳气化反应动力学时,使用Gorbatchev函数是求取反应动力学参数的较好方法.结果表明:活化能和指前因子都随着升温速率的增加而减小.活化能和指前因子之间有着较好的线性关系,碳气化反应过程中存在着动力学补偿效应.Kinetics of carbon gasification reaction was studied by non-isothermal thermogravimetric analysis using Labsys simultaneous thermal analyzer.The effects of heating rate on carbon gasification reaction were investigated.In non-isothermal thermogravimetric analysis,Doyle and Gorbatchev approximate functions could be used to simulate carbon gasification behavior.After comparing the correlation coefficients of approximate simulations,it was found that the better function to calculate gasification kinetic parameters was Gorbatchev approximate function in non-isothermal thermogravimetric analysis.The results showed that the values of the activation energy and the pre-exponential factor decrease with increase of heating rate.There is a better linear relationship between the activation energy and the pre-exponential factor.There exists a kinetic compensation effect in the process of carbon gasification reaction.

关 键 词：非等温 热重分析 碳气化 动力学 

分 类 号：TF55[冶金工程—钢铁冶金]