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Experimental study on effect of mudstone on spontaneous combustion of coal

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  • Zhang, Xun
  • Zou, Jiahui
  • Lu, Bing
  • Huang, Ge
  • Yu, Chen
  • Liang, Huimin

Abstract

The influence of mudstone on the spontaneous combustion of coal was investigated in this study. The effects of different proportions of mudstone on the characteristic temperature, thermal effect, thermal physical parameters, and combustion characteristic index of coal were analyzed by TG-DSC experiments and thermal physical parameter test experiments. The catalytic mechanism of mudstone on the active structure of coal oxidation was obtained by Fourier transform infrared spectroscopy. The results showed that an interaction exists between coal and mudstone, and different stages had different effects. The combustion characteristic index showed a trend of an initial increase followed by a decrease. The thermal conductivity and thermal diffusivity of MY-1 samples were larger than those of raw coal samples, indicating that a small amount of mudstone had the most obvious effect on coal combustion and played a promoting role in the heat transfer of coal samples. The carbon content of mudstone was much lower than that of coal, and the content of metals and their oxides and sulfides was higher. The content of aliphatic hydrocarbons and hydroxyl groups in the samples mixed with mudstone decreased. When coal coexists with a small amount of mudstone, the risk of spontaneous combustion of coal increases.

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  • Zhang, Xun & Zou, Jiahui & Lu, Bing & Huang, Ge & Yu, Chen & Liang, Huimin, 2023. "Experimental study on effect of mudstone on spontaneous combustion of coal," Energy, Elsevier, vol. 285(C).
    • Handle: RePEc:eee:energy:v:285:y:2023:i:c:s0360544223021783
    DOI: 10.1016/j.energy.2023.128784
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    References listed on IDEAS

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    1. Yutao, Zhang & Yuanbo, Zhang & Yaqing, Li & Xueqiang, Shi & Yujie, Zhang, 2021. "Heat effects and kinetics of coal spontaneous combustion at various oxygen contents," Energy, Elsevier, vol. 234(C).
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    Cited by:

    1. Zhang, Xun & Lu, Bing & Qiao, Ling & Ding, Cong, 2023. "Study on the kinetics of chemical structure reaction in coal catalyzed by OH free radicals," Energy, Elsevier, vol. 285(C).
    2. Gao, Fei & Bai, Qihui & Jia, Zhe & Zhang, Xun & Li, Yingdi, 2024. "Influence and inerting mechanism of inert gas atmospheres on the characteristics of oxidative spontaneous combustion in coal," Energy, Elsevier, vol. 293(C).
    3. Zhang, Yanni & Hou, Yunchao & Yang, Dan & Deng, Jun, 2024. "Transformation and migration of key elements during the thermal reaction of coal spontaneous combustion," Energy, Elsevier, vol. 290(C).
    4. Zhang, Xun & Liang, Huimin & Lu, Bing & Qiao, Ling & Huang, Ge & Yu, Chen & Zou, Jiahui, 2024. "Correlation and stage change of key groups and thermal effects of spontaneous coal combustion due to long-term ultraviolet illumination," Energy, Elsevier, vol. 293(C).

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