Experimental study on the effect of thermosensitive controlled-release inhibitor on coal spontaneous combustion

作者：Shengli Guo, Weile Geng, Shujie Yuan, Xiaoxue Xu, Shuwen Zhang, Qingguo Ren, Chengli Liu · 发表于：Case Studies in Thermal Engineering · 年份：2025 · DOI：10.1016/j.csite.2025.105955 · 被引用次数：10 · 研究领域：Coal Properties and Utilization、Geoscience and Mining Technology、Geomechanics and Mining Engineering

Inhibitors are widely used on-site due to their effective prevention. The effect of a novel compound inhibitor composed of thermosensitive hydrogel (TSH) and antioxidants (tea polyphenols (TP) and L-ascorbic acid (VC)) on coal spontaneous combustion (CSC) characteristics was studied. Its inhibitory effect was compared with that of the single component or MgCl 2 by macroscopic and microscopic tests. The results show that the release of CO or CO 2 from coal treated with inhibitors during temperature-programmed tests was reduced, and the crossing-point temperature of TSH-TP/VC-treated coal increased by 21.4 °C. The content of –CH 2 , –CH 3 and oxygen-containing group in inhibitor-treated coal decreased than before, the characteristic temperature of spontaneous combustion increased significantly, and the mass gain values of coal treated with TSH-TP/VC, TSH, TP/VC or MgCl 2 decreased by 0.99 %, 0.93 %, 0.87 %, 0.24 %, respectively. The inhibitory efficacy of TSH-TP/VC is superior to the effect of single component or traditional inhibitor MgCl 2 , and it is effective in inhibiting the entire oxidative decomposition and combustion stage of coal. TSH can effectively cover the coal body and remove the accumulated heat. At the same time, TP/VC hinders the emergence of free radicals and chelates with metal ions, thereby exhibiting a significant suppression of CSC. The effect of a novel thermosensitive controlled-release inhibitor on coal spontaneous combustion characteristics was studie...