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

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-02-25 DOI:10.1016/j.csite.2025.105955

Shengli Guo , Weile Geng , Shujie Yuan , Xiaoxue Xu , Shuwen Zhang , Qingguo Ren , Chengli Liu

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Abstract

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 MgCl₂ by macroscopic and microscopic tests. The results show that the release of CO or CO₂ 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 –CH₂, –CH₃ 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 MgCl₂ 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 MgCl₂, 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.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.