Study on the difference between tectonic coal and raw coal oxidative spontaneous combustion

IF 5.1 3区工程技术 Q2 ENERGY & FUELS

Thermal Science and Engineering Progress Pub Date : 2025-03-02 DOI:10.1016/j.tsep.2025.103469

Hailin Jia , Kaixuan Zhou , Xiaoju Zhao , Rongkun Pan , Ligang Zheng , Jiangkun Chao , Daimin Hu , Lin Li

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引用次数: 0

Abstract

Industrial and elemental analysis experiments, low temperature liquid nitrogen adsorption experiments, TG/DSC comprehensive thermal analysis experiments and programmed temperature oxidation experiments were carried out on the fractured tectonic coal and raw coal in the same coal seam. The experimental results demonstrated that, compared with the raw coal, the tectonic coal exhibited an increase in pore volume and specific surface area, along with good pore connectivity. During the endothermic and exothermic reaction stages, the endothermic heat of the tectonic coal was lower than that of the raw coal. The gas production trends of the two types of coal intersected with the curves of the consumption rates of CO and oxygen. Before the intersection temperature, the gas production rate and oxygen consumption rate of the tectonic coal were higher than those of the raw coal, while after that, the gas production rate and oxygen consumption rate of the raw coal were higher. Based on the growth curves of CO and C₂H₄ gas production, the temperatures of the tectonic coal and the raw coal were different at the end of the slow oxidation stage and the beginning of the fast oxidation stage. Generally speaking, there are significant differences between tectonic coal and raw coal in physical and chemical structure and oxidation spontaneous combustion characteristics. In the slow oxidation stage, the oxidizing ability of tectonic coal is stronger, while the raw coal reacts more fiercely in the rapid oxidation stage.

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来源期刊

Thermal Science and Engineering Progress Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

7.20

自引率

10.40%

发文量

327

审稿时长

41 days

期刊介绍： Thermal Science and Engineering Progress (TSEP) publishes original, high-quality research articles that span activities ranging from fundamental scientific research and discussion of the more controversial thermodynamic theories, to developments in thermal engineering that are in many instances examples of the way scientists and engineers are addressing the challenges facing a growing population – smart cities and global warming – maximising thermodynamic efficiencies and minimising all heat losses. It is intended that these will be of current relevance and interest to industry, academia and other practitioners. It is evident that many specialised journals in thermal and, to some extent, in fluid disciplines tend to focus on topics that can be classified as fundamental in nature, or are ‘applied’ and near-market. Thermal Science and Engineering Progress will bridge the gap between these two areas, allowing authors to make an easy choice, should they or a journal editor feel that their papers are ‘out of scope’ when considering other journals. The range of topics covered by Thermal Science and Engineering Progress addresses the rapid rate of development being made in thermal transfer processes as they affect traditional fields, and important growth in the topical research areas of aerospace, thermal biological and medical systems, electronics and nano-technologies, renewable energy systems, food production (including agriculture), and the need to minimise man-made thermal impacts on climate change. Review articles on appropriate topics for TSEP are encouraged, although until TSEP is fully established, these will be limited in number. Before submitting such articles, please contact one of the Editors, or a member of the Editorial Advisory Board with an outline of your proposal and your expertise in the area of your review.