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Experimental study on inhibition of spontaneous combustion of different-rank coals by high-performance m-Cresol water-based inhibitor solutions

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  • Lu, Wei
  • Gao, Ao
  • Sun, Weili
  • Liang, Yuntao
  • He, Zhenglong
  • Li, Jinliang
  • Sun, Yong
  • Song, Shuanglin
  • Meng, Shaocong
  • Cao, Yingjiazi

Abstract

A kind of simple and efficient m-Cresol water-based inhibitor was proposed. The inhibitory effects of its solutions on the spontaneous combustion of different-rank coals were discussed. Furthermore, the micromorphology and wetting characteristics of different-rank coals were analyzed through a scanning electron microscope and a contact angle meter, respectively. Besides, the weight loss rates, oxidation characteristics, pore structure characteristics and free radical changes of different coal samples were investigated by a thermogravimetric analyzer, temperature-programmed experiments, a surface area analyzer and an electron spin resonance spectrometer, respectively. The results indicate that the prepared inhibitor solution at the 0.3 wt% sodium dodecyl sulfate (SDS) not only boasts good emulsification and wetting performance, but also plays a role in permeability enhancement. The m-Cresol/SDS solution can wet the coal surface and permeate the inner pore surface, forming a uniform inhibitor layer on both the coal surface and the inner pore surface to isolate oxygen, retain water and inhibit free radical generation. Moreover, it can not only effectively reduce the weight loss rate, CO production, specific surface areas and free radical concentration in the oxidation process of CoalXLH, CoalBLT and CoalYQ, but also improve the inhibition rate (to 79.1%, 67.4% and 54.3% at 170 °C respectively).

Suggested Citation

  • Lu, Wei & Gao, Ao & Sun, Weili & Liang, Yuntao & He, Zhenglong & Li, Jinliang & Sun, Yong & Song, Shuanglin & Meng, Shaocong & Cao, Yingjiazi, 2022. "Experimental study on inhibition of spontaneous combustion of different-rank coals by high-performance m-Cresol water-based inhibitor solutions," Energy, Elsevier, vol. 261(PA).
    • Handle: RePEc:eee:energy:v:261:y:2022:i:pa:s0360544222020321
    DOI: 10.1016/j.energy.2022.125138
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    1. Zhao, Jingyu & Deng, Jun & Chen, Long & Wang, Tao & Song, Jiajia & Zhang, Yanni & Shu, Chi-Min & Zeng, Qiang, 2019. "Correlation analysis of the functional groups and exothermic characteristics of bituminous coal molecules during high-temperature oxidation," Energy, Elsevier, vol. 181(C), pages 136-147.
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    1. Lu, Wei & Gao, Ao & Liang, Yuntao & He, Zhenglong & Li, Jinliang & Sun, Yong & Song, Shuanglin & Meng, Shaocong, 2023. "Stable and highly efficient HMDS terminated m-Cresol inhibitor for inhibiting coal spontaneous combustion," Energy, Elsevier, vol. 282(C).
    2. Xu, Xiaoxue & Yuan, Shujie & Li, Jinhu & Guo, Shengli & Yan, Zhuo, 2023. "Preparation of lignin-based intumescent nanogel and its mechanism of inhibiting coal spontaneous combustion," Energy, Elsevier, vol. 275(C).
    3. Bu, Yun-chuan & Niu, Hui-yong & Wang, Tao & Yang, Yan-xiao & Qiu, Tian, 2024. "Combustion characteristics of the thermal-mechanical coupling of broken coal in multiple atmospheres and the re-ignition laws of residual coal," Energy, Elsevier, vol. 299(C).

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