摘要
运用等温热重技术,以二氧化碳为气化剂,考察不同气化温度(700℃,750℃,800℃,850℃,900℃,940℃)下,煤焦气化率随时间的变化。运用灰色理论及方法,建立煤焦气化率预测模型GM(1,1),预测结果与实验数据对比表明:该模型能够对不同气化温度下煤焦的气化率,进行较好的预测。此外,煤焦气化率为50%时,研究其800℃～850℃,850℃～900℃和900℃～940℃的动力学参数。结果表明,频率因子并不是常数,而是随活化能的增大而增大,表现出"补偿效应";lnA0(A0是频率因子)和Ea(活化能)之间有较好的线性关系。
The isothermal thermo-gravimetric analysis was used to study the gasification reaction characteristics of char in CO2 atmosphere under different temperatures（700 ℃,750 ℃,800 ℃,850 ℃,900 ℃,940 ℃）.A grey forecasting model GM（1,1） was developed to predict the gasification rate of char,and the predicted results were good in agreement with experimental data.What＇s more,when the char gasification rate was 50%,this article analyzed the char gasification kinetics under different temperature span,which ranged from 800 ℃ to 940 ℃.The data showed： kinetic compensation relationship existed between the activation energy and frequency factor and the relation of lnA0（A0 is frequency factor） and E（the activation energy） is linearity.
出处
《电力科学与工程》
2011年第10期57-60,共4页
Electric Power Science and Engineering
关键词
煤焦气化
灰色模型
动力学分析
补偿效应
gasification
grey model
kinetic analysis
compensation effect
