摘要
在制焦温度为1223-1773 K内,制备了慢速和快速神府煤焦,采用程序升温热重法研究了煤焦-CO2高温气化反应性。主要研究了升温速率、制焦温度和热解速率对煤焦反应性的影响,并对一种高温慢速热解焦（制焦温度为1573 K）的程序升温和等温动力学进行了比较。结果表明：升温速率对煤焦-CO2气化反应有明显影响;制焦温度较高的煤焦反应性较低;快速热解有利于提高煤焦的反应性;由程序升温法和等温法所得活化能随转化率变化呈现不同的趋势,但所得活化能的平均值分别为160.13 kJ/mol和163.21 kJ/mol,十分接近。
The slow and rapid coal char samples were prepared at elevated temperatures ranging from 1 223 K to 1 773 K by temperature-programmed and isothermal pyrolysis. Investigations were performed to determine the effects of heating rate, pyrolysis temperature, and pyrolysis rate on the chars, CO2 gasification reactivity as measured by temperature-programmed thermogravimetry. Reaction kinetics of slow pyrolysis at 1 573 K under programmed heating was obtained and compared to that of the isothermal case. The CO2 gasification reactivity is significantly affected by the heating rate and the pyrolysis temperature; more active chars are formed at a relatively low pyrolysis temperature or by rapid pyrolysis. The slow and rapid coal chars had about the same average activation energy of different distribution patterns.
出处
《华东理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第3期354-358,共5页
Journal of East China University of Science and Technology
基金
国家重点基础研究规划项目(2004CB217704)
关键词
煤焦
CO2气化
程序升温热重法
高温热解
coal char
CO2 gasification
temperature-programmed thermogravimetry
elevated temperature pyrolysis
