Correlation analysis of the functional groups and exothermic characteristics of bituminous coal molecules during high-temperature oxidation

Jingyu Zhao, Jun Deng, Long Chen, Tao Wang, Jiajia Song, Yanni Zhang, Chi-Min Shu and Qiang Zeng

Energy, 2019, vol. 181, issue C, 136-147

Abstract: Coal spontaneous combustion is characterized by high-temperature oxidation and microscopic mechanisms. These are essential aspects to understand when attempting to control or prevent spontaneous combustion. Three fresh bituminous coal samples were collected for experimentation from Huainan, China. X-ray diffraction and Fourier-transform infrared spectrometry were conducted to determine the microscopic characteristics of coal during high-temperature oxidation. The mineral structures and functional groups were ascertained to ensure that the original structural characteristics of the coals were obtained. Thermogravimetry–differential scanning calorimetry was used to divide the high-temperature oxidation into four substages and obtain detailed exothermic characteristics. The heat energy release exhibited a positive correlation with an increase in temperature.

Keywords: Coal spontaneous combustion; Functional groups; Structural characteristics; Exothermic characteristics; Correlation analysis (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (31)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:181:y:2019:i:c:p:136-147

DOI: 10.1016/j.energy.2019.05.158

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