文献类型：期刊文献

中文题名：程序升温热重法研究神府高温煤焦-CO_2气化反应性

英文题名：Measurement of CO_2 Gasification Reactivity for High Temperature Pyrolyzed Coal Chars by Temperature-Programmed Thermogravimetry

作者：顾菁[1];李莉[1];吴诗勇[1];吴幼青[1];高晋生[1]

机构：[1]华东理工大学能源化工系,上海200237

年份：2007

卷号：33

期号：3

起止页码：354

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：20072910703231);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家重点基础研究规划项目(2004CB217704)

语种：中文

中文关键词：煤焦;CO2气化;程序升温热重法;高温热解

外文关键词：coal char; CO2 gasification; temperature-programmed thermogravimetry; elevated temperature pyrolysis

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.