Combustion characteristics of unburned pulverized coal and its reaction kinetics with CO2

作     者：Dong-wen Xiang Feng-man Shen Jia-long Yang Xin Jiang Hai-yan Zheng Qiang-jian Gao Jia-xin Li 

作者机构：School of Metallurgy Northeastern University Shenyang 110819 China School of Metallurgical Engineering Anhui University of Technology Ma’anshan 243002 China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2019年第26卷第7期

页      面：811-821页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51874080, 51604069, and 51774071) the Fundamental Research Funds for the Central Universities, China (No. N162504004) 

主　　题：unburned pulverized coal combustion characteristics reactivity reaction mechanism apparent activation energy 

摘      要：The combustion characteristics of two kinds of unburned pulverized coal (UPC) made from bituminous coal and anthracite were investigated by thermogravimetric analysis under air. The reaction kinetics mechanisms between UPC and CO2 in an isothermal experiment in the temperature range 1000–1100°C were investigated. The combustion performance of unburned pulverized coal made from bituminous coal (BUPC) was better than that of unburned pulverized coal made from anthracite (AUPC). The combustion characteristic indexes (S) of BUPC and AUPC are 0.47 × 10^-6 and 0.34 × 10^-6 %2·min^-2·°C^-3, respectively, and the combustion reaction apparent activation energies are 91.94 and 102.63 kJ·mol^-1, respectively. The reaction mechanism of BUPC with CO2 is random nucleation and growth, and the apparent activation energy is 96.24 kJ·mol^-1. By contrast, the reaction mechanism of AUPC with CO2 follows the shrinkage spherical function model and the apparent activation energy is 133.55 kJ·mol^-1.