A novel nano-modified inhibitor of tert-butyl hydroquinone/sodium polyacrylate for inhibiting coal spontaneous combustion

Zhian Huang, Donghong Song, Xiangming Hu, Yinghua Zhang, Yukun Gao, Sainan Quan, Yichao Yin, Yifu Yang, Hongsen Luo and Yucheng Ji

Energy, 2022, vol. 256, issue C

Abstract: In this study, we developed a modified antioxidant-type inhibitor (MAT-inhibitor) to address the disadvantages of the inhibitors that are currently used in coal mines, namely single effect, poor thermal stability, and low versatility. Sodium acrylate, tert-butyl hydroquinone (TBHQ), and montmorillonite were used as raw materials. X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) were adopted to analyze the inhibition performance and mechanism of the MAT-inhibitor. Research indicates that the MAT-inhibitor is able to fully cover the coal surface, and has strong water absorption qualities. TBHQ in the inhibitor significantly reduces the content of methyl (-CH3), methylene (–CH2–), hydroxyl (-OH), and carboxyl groups (-COOH) in the coal radical chain reaction. In the meantime, it increases the stable ether bond content (C–O–C). After treatment with the MAT-inhibitor, the dry cracking temperature of the coal sample increased by 52.8 °C, and the maximum thermal mass loss rate decreased by 0.84%/min. This proved that the inhibitor has superior thermal stability and high inhibition performance. Therefore, regardless of the physical, chemical, and thermal stability aspects, the MAT-inhibitor can be used to control the spontaneous combustion of coal.

Keywords: Antioxidant; Nano-modification; Spontaneous combustion of coal; Inhibition mechanism; Inhibition effect (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:256:y:2022:i:c:s0360544222013421

DOI: 10.1016/j.energy.2022.124439

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