刘　剑,赵凤杰

(辽宁工程技术大学资源与环境工程学院,辽宁阜新123000)

摘　要:使用热重分析仪器,对不同煤样在不同升温速率下进行了实验研究,结果表明,提高升温速率,TG曲线向高温方向移动;运用热分析动力学方法求出不同煤样在不同升温速率下的活化能,结果发现随着升温速率的增加,煤的活化能逐渐增大,升温速率是影响煤的自燃倾向性表征的重要因素。

关键词:升温速率;活化能;TG曲线;热重分析;自燃倾向性

中图分类号:TD75+2.2　　　文献标识码:A　　　文章编号:1003-496X(2006)05-0004-03

Study on Effect of Heating Rate on Spontaneous CombustionTendency Characterization of Coal

LIU Jian,ZHAO Feng-jie(College of Resource and Environment Engineering,LiaoningTechnicalUniversity,Fuxin123000China)Abstract:Using thermogravimetric analysis instrument, experiment of different coal sample were carried out on different heatingrate. The studies show that TG curves move to high temperature zone with the increasing of heating rate. Activation energy werecomputed using the method of thermoanalysis kinetics. The results suggest that activation energy of coal gradually increased with theincreasing of heating rate. Heating rate is a important influential factor for spontaneous combustion tendency characterization of thecoal.

Key words:heating rate; activation energy; TG curve; thermogravimetric analysis; spontaneous combustion tendency

基金项目:辽宁省自然科学基金资助项目(2001101064)　　活化能可以作为划分煤的自燃倾向性的指标,为了使这一指标科学有效的应用于煤的自燃倾向性的鉴定,必须进行自燃倾向性的深入研究和探讨。本文利用热重分析仪器,得到了不同煤样在不同升温速率下自燃过程的热重曲线,根据热重曲线的数据计算出了煤样自燃反应的动力学参数,并讨论了升温速率对煤自燃倾向性表征的影响情况。

1　实验仪器及参数设定

实验仪器采用德国NETZSCH公司生产的STA449C

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