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


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.


[1] A.Sánchez, E.Eddings, F.Mondragón, Fourier transform infrared on line monitoring of NO, N2O, and CO2 during oxygen-enriched combustion of carbonaceous materials, Energy and Fuels, 24(9) (2010) 4849-4853.
[2] Tang Xiaojun, Liang Yuntao,Dong Haozhe,et al., Analysis of index gases of coal spontaneous combustion using Fourier transform infrared spectrometer, Journal of Spectroscopy, 2014(2014) 1-8.
[3] K. Yip, E. Ng, C.-Z. Li, et al., A mechanistic study on kinetic compensation effect during low-temperature oxidation of coal chars, Proceedings of the Combustion Institute, 33(2) (2011)1755-1762.
[4] Qi Xuyao,Wang Deming, Xue Haibo, et al., Oxidation and self-reaction of carboxyl groups during coal spontaneous combustion, Spectroscopy Letters, 48(3) (2015)173-178.
[5] Zhang Weiqing, Jiang Shuguang, Wang Kai, et al., Thermogravimetric dynamics and FTIR analysis on oxidation properties of low-rank coal at low and moderate temperatures, International Journal of Coal Preparation and Utilization, 35(1) (2015)39-50.
[6] Wang Deming, Zhong Xiaoxing, Gu Junjie, et al., Changes in active functional groups during low-temperature oxidation of coal,Mining Science and Technology, 20(1) (2010)35-40.
[7] Zhang Yulong, Wu Jianming, Chang Liping, et al., Changes in the reaction regime during low-temperature oxidation of coal in confined spaces, Journal of Loss Prevention in the Process Industries, 26(6) (2013)1221-1229.
[8] J.N. Carras, S.J. Day, A. Saghafi, et al., Greenhouse gas emissions from low-temperature oxidation and spontaneous combustion at open-cut coal mines in Australia, International Journal of Coal Geology, 78(2)(2009)161–168.
[9] L. Yuan, A.C. Smith, CO and CO2 emissions from spontaneous heating of coal under different ventilation rates, International Journal of Coal Geology, 88(1)( 2011) 24-30.
[10] Deng Jun, Xiao Yang, Li Qingwei, et al., Experimental studies of spontaneous combustion and anaerobic cooling of coal, Fuel, 157(2015) 261-269.
[11] A. Adamus, J. Šancer, P. Guřanová, et al., An investigation of the factors associated with interpretation of mine atmosphere for spontaneous combustion in coal mines, Fuel Processing Technology, 92(3)( 2011) 663-670.
[12] V. Slovák, B. Taraba, Effect of experimental conditions on parameters derived from TG-DSC measurements of low-temperature oxidation of coal, Journal of Thermal Analysis and Calorimetry, 101(2) (2010)641-646.
[13] K. E. Benfell, B. B. Beamish, K. A. Rodgers, Thermogravimetric analytical procedures for characterizing New Zealand and Eastern Australian coals, ThermochimicaActa, 286(1)(1996) 67.
[14] J. Mrazikova,S.Sindler,L.Veverka, et al., Evolution of organic oxygen bonds during pyrolysis of coal, Fuel, 65(3) (1986) 342-345.
[15] A. Arenillas, F.Rubiera, J.J. Pis, Simultaneous thermogravimetric-weight spectrometric study on the pyrolysis behaviour of different rank coals, Journal of Analytical and Applied Pyrolysis, 50(1)(1999) 31-46.
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: <>. Date accessed: 28 sep. 2021.
Energy Engineering and Technology

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