Thermogravimetric Analysis of the Combustion Characteristics and Combustion Kinetics of Coals Subjected to Different Chemical Demineralization Processes.
Thermogravimetric Analysis of the Combustion Characteristics and Combustion Kinetics of Coals Subjected to Different Chemical Demineralization Processes.
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不同化学脱盐过程煤的燃烧特性和燃烧动力学的热重分析
DOI：
10.1021/acsomega.2c00522
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发表时间：
2022-04-26
期刊：
影响因子：
4.1
通讯作者：
Zhong, Qifan
中科院分区：
文献类型：
--
作者：
Tang, Lei;Xiao, Jin;Mao, Qiuyun;Zhang, Zhenhua;Yao, Zhen;Zhu, Xiangdong;Ye, Shengchao;Zhong, Qifan
为了探究不同化学脱矿对煤燃烧特性和燃烧动力学的影响，通过热重分析对五种经过不同化学脱矿过程的煤进行了研究。经过不同的化学脱矿后，精煤的灰分含量可降低至0.1%~1.55%。煤的着火温度降低了12~69℃，峰值温度降低了7~62℃。精煤经NaOH脱盐后燃尽温度提高了63℃。不可燃的NaOH吸附到TaiXi-3的多孔结构中导致燃尽温度升高。碱溶性矿物质被证明对煤的燃烧性能有负面影响，而酸溶性矿物质则具有相反的影响。研究了5种煤在10℃/min升温速率下的燃烧动力学。煤的活化能在脱盐前后发生了明显的变化（58.39~91.39 kJ mol-1）。精煤的活化能明显低于原煤。
In order to explore the influence of different chemical demineralizations on coal combustion characteristics and combustion kinetics, five coals subjected to different chemical demineralization processes were investigated via thermogravimetric analysis. The ash contents of clean coal was reduced to 0.1–1.55% after different chemical demineralizations. The ignition temperature of coal decreased by 12–69 °C, and the peak temperature decreased by 7–62 °C. The burnout temperature of clean coal increased by 63 °C after demineralization by NaOH. The adsorption of noncombustible NaOH into the porous structure of TaiXi-3 caused an increase in burnout temperature. Alkali-soluble minerals were proven to have a negative effect on the combustion performance of coal, while acid-soluble minerals had the opposite effect. The combustion kinetics of five kinds of coals at a heating rate of 10 °C/min was investigated. The activation energy of coal obviously changes before and after demineralization (58.39–91.39 kJ mol–1). The activation energy of clean coal is obviously lower than that of raw coal.
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