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Study on Spontaneous Combustion Tendency of Coals with Different Metamorphic Grade at Low Moisture Content Based on TPO-DSC

by 1, 1,2,* and 3
1
College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2
Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, Qingdao 266590, China
3
Hebei Province Key Laboratory of Mine Development and Safety Technology, North China University of Science and Technology, Tangshan 063210, China
*
Author to whom correspondence should be addressed.
Energies 2019, 12(20), 3890; https://doi.org/10.3390/en12203890
Received: 14 September 2019 / Revised: 5 October 2019 / Accepted: 9 October 2019 / Published: 15 October 2019
In the environments of various open coal storage sites, mining-affected coalbeds, and goafs, etc., some coal bodies are often affected by external environmental factors. They are highly prone to spontaneous combustion in low moisture content (≤8%). In order to examine the effect of low moisture content on the spontaneous combustion tendency of coals with different metamorphic grade, we conducted a temperature programmed oxidation (TPO) experiment and differential scanning calorimetry (DSC) experiment to study the spontaneous combustion characteristics of coals with different metamorphic grade at four different low moisture contents. The change laws of the characteristic parameters of four different metamorphic grade coals at four different low moisture contents were comparatively analyzed. The experimental results indicate that: (1) Compared other low moisture content, anthracite and fat coal at a low moisture content of 1.2 % show a stronger tendency for spontaneous combustion, and long flame coal and lignite at a low moisture content of 3.4% and 5.6% are more prone to spontaneous combustion. (2) Four different metamorphic grade coals at a low moisture content of 7.8% are less prone to spontaneous combustion. View Full-Text
Keywords: low moisture content; metamorphic grade; temperature-programmed oxidation; differential scanning calorimetry; spontaneous combustion tendency low moisture content; metamorphic grade; temperature-programmed oxidation; differential scanning calorimetry; spontaneous combustion tendency
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MDPI and ACS Style

Fan, J.; Wang, G.; Zhang, J. Study on Spontaneous Combustion Tendency of Coals with Different Metamorphic Grade at Low Moisture Content Based on TPO-DSC. Energies 2019, 12, 3890. https://doi.org/10.3390/en12203890

AMA Style

Fan J, Wang G, Zhang J. Study on Spontaneous Combustion Tendency of Coals with Different Metamorphic Grade at Low Moisture Content Based on TPO-DSC. Energies. 2019; 12(20):3890. https://doi.org/10.3390/en12203890

Chicago/Turabian Style

Fan, Jiuyuan, Gang Wang, and Jiuling Zhang. 2019. "Study on Spontaneous Combustion Tendency of Coals with Different Metamorphic Grade at Low Moisture Content Based on TPO-DSC" Energies 12, no. 20: 3890. https://doi.org/10.3390/en12203890

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