Effect of O2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion

被引：4
|
作者：
Gao, Shaolong [1 ,2 ]
Wang, Baofeng [1 ]
Yang, Fengling [1 ]
Zhang, Kai [1 ,3 ]
Cheng, Fangqin [1 ]
机构：
[1] Shanxi Univ, Inst Resources & Environm Engn, Minist Educ Peoples Republ China, Engn Res Ctr CO2 Emiss Reduct & Resource Utilizat, Taiyuan, Shanxi, Peoples R China
[2] Univ Western Australia, Ctr Energy M473, Crawley, WA, Australia
[3] North China Elect Power Univ, Beijing Key Lab Emiss Surveillance & Control Ther, Beijing, Peoples R China
来源：
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING | 2021年 / 16卷 / 06期
基金：
中国国家自然科学基金;
关键词：
coal gangue; combustion characteristics; kinetics; oxy-fuel combustion; oxy-steam combustion; PULVERIZED COAL; FLUIDIZED-BED; CHAR PARTICLES; PYROLYSIS; O-2/CO2; O-2/N-2; MIXTURES; BIOMASS; FUNDAMENTALS; MODEL;
D O I：
10.1002/apj.2713
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
In this work, the effect of O-2 concentration on combustion behavior and kinetics of coal gangue during oxy-fuel combustion and oxy-steam combustion were studied by non-isothermal thermogravimetric analysis technology. The results showed that the increase of O-2 concentration could improve the combustion performance of coal gangue. The O-2/CO2 atmosphere was unfavorable to the combustion of coal gangue compared with the O-2/N-2 atmosphere. Furthermore, the gasification reaction could accelerate overall carbon consumption in oxy-steam combustion with 5% O-2 concentration; and the presence of H2O could delay the ignition and accelerate burnout at this condition. Kinetic analysis showed that the combustion of coal gangue in O-2/N-2 and O-2/CO2 atmosphere followed the first-order kinetics under O-2 concentrations studied; and the combustion in O-2/H2O atmosphere followed the 0.5-order kinetics at 5% and 10% O-2 concentration, while it followed the first-order kinetics at 21% O-2 concentration.
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页数：12
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