Combustion characteristics of unburned pulverized coal and its reaction kinetics with CO2
来源期刊：International Journal of Minerals Metallurgy and Materials2019年第7期
论文作者：Dong-wen Xiang Feng-man Shen Jia-long Yang Xin Jiang Hai-yan Zheng Qiang-jian Gao Jia-xin Li
文章页码：811 - 821
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.
Dong-wen Xiang，Feng-man Shen，Jia-long Yang，Xin Jiang，Hai-yan Zheng，Qiang-jian Gao，Jia-xin Li
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.
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