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煤燃烧反应活化能的两种研究方法的比较
引用本文:刘建忠,冯展管,张保生,周俊虎,岑可法.煤燃烧反应活化能的两种研究方法的比较[J].动力工程,2006,26(1):121-124.
作者姓名:刘建忠  冯展管  张保生  周俊虎  岑可法
作者单位:1. 浙江大学,能源清洁利用国家重点实验室,杭州,310027
2. 浙江大学,热能工程研究所,杭州,310027
摘    要:采用单个扫描速率法中的Coats-Redfern法和多重扫描速率法中的等转化率法对三种煤的燃烧反应的活化能进行了研究。结果表明:Coats-Redfern法需要对反应机理函数进行假设,显示的活化能值受升温速率的影响较大,对不同煤种的区分也不明显。而等转化率法不需要假设机理函数,而且可以减小升温速率所导致的误差,可以较好地区分不同煤种的活化能值。

关 键 词:工程热物理  活化能  热分析    燃烧
文章编号:1000-6761(2006)01-121-04
收稿时间:2005-08-08
修稿时间:2005-08-08

Comparison of Two Methods for Analyzing the Activation Energy of Coal Combustion
LIU Jian-zhong,FENG Zhan-guan,ZHANG Bao-sheng,ZHOU Jun-hu,CEN Ke-fa.Comparison of Two Methods for Analyzing the Activation Energy of Coal Combustion[J].Power Engineering,2006,26(1):121-124.
Authors:LIU Jian-zhong  FENG Zhan-guan  ZHANG Bao-sheng  ZHOU Jun-hu  CEN Ke-fa
Institution:State Key Lab. Of Clean Energy Utilization, Zhejiang University; Research Institute of Thermal Engineering, Zhejiang University, Hangzhou 310027, China
Abstract:The activation energy in combustion reactions of three kinds of coal has been analyzed by the Coats-Redfern method,which is one of the individually scanning methods,as well as by the isoconversional method,which is one of the multiple scanning methods.Results indicate that: the Coats-Redfern method requires the assumption of the reaction's kinetic mechanism function;the displayed activation energy value is markedly affected by the heating rate,while not differing much for different kinds of coal.The isoconversional method on the other hand doesn't need any kinetic mechanism function to be assumed;it is able to diminish the error caused by the heating rate and can easily distinguish the differing activation energy of different kinds of coal.Figs 5,tables 3 and refs 7.
Keywords:engineering thermophysics  activation energy  thermal analysis  coal  combustion
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