Comprehensive Study on Bituminous Coal Oxidation by TGA–DTA–FTIR Experiment

  • Hongfen Zhang China University of Mining & Technology, Beijing
  • Erxin Gao China University of Mining & Technology, Beijing
  • Xingchen Zhang University of Bath

Abstract

The spontaneous combustion of coal can have serious consequences. Bituminous coal is especially problematic asit produces a large amount of smoke comparative to other coals. Variable heating rate thermogravimetry analysis–dierential thermal analysis–Fourier transform infrared spectroscopy experiments (TGA–DTA–FTIR) were conductedon three kinds of bituminous coals to study the change rule of weight, heat, and generated gas during the entire oxidationprocess from slow self-heating to burn out. Experimental results indicate that weight, heat, and gas release are in mutualcorrespondence at stages 1-4 in the oxidation process. However, change in generated gas lags behind weight and heatchanges in the last stage. The main gas products of the oxidation process are CO, CO2, H2O, and CH4.The process of gasrelease depends on the reaction characteristics of related active structures. The concentration of generated gas from thesame coal is CO2>H2O>CO>CH4. CO2 accounts for about 90% of the total amount of gas. The relationships betweenabsorbance and temperature of generated gases in the rapid generation stage are linear or binomial, R2 are higher than0.95. A comparison of the experimental results on dierent bituminous coals shows that when volatile matter is high,the characteristic temperatures are low and the concentration of generated gas and rate of heat release are high.

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Published
2015-09-20
How to Cite
ZHANG, Hongfen; GAO, Erxin; ZHANG, Xingchen. Comprehensive Study on Bituminous Coal Oxidation by TGA–DTA–FTIR Experiment. Journal of Power Technologies, [S.l.], v. 95, n. 3, p. 167--174, sep. 2015. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/702>. Date accessed: 28 sep. 2021.
Section
Energy Engineering and Technology

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