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Article

Study on the Influence Mechanism of the Key Active Structure of Coal Molecules on Spontaneous Combustion Characteristics Based on Extraction Technology

by
Jun Guo
1,2,
Yunfei Wu
1,*,
Yin Liu
1,3,
Guobin Cai
1,
Dailin Li
1 and
Yan Jin
1,4
1
College of Safety Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2
Key Laboratory of Western Mine and Hazard Prevention, Ministry of Education of China, Xi’an 710054, China
3
College of Energy Engineering, Xi’an University of Science and Technology, No. 58, Yanta Mid. Rd., Xi’an 710054, China
4
Taizhou Petroleum Branch, Sinopec Sales Co., Ltd., Taizhou 318000, China
*
Author to whom correspondence should be addressed.
Fire 2024, 7(8), 283; https://doi.org/10.3390/fire7080283
Submission received: 15 July 2024 / Revised: 6 August 2024 / Accepted: 11 August 2024 / Published: 13 August 2024
(This article belongs to the Special Issue Simulation, Experiment and Modeling of Coal Fires)
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Abstract

The molecular structure of coal is complex, and the existing research methods are limited, so it is difficult to clarify its influence mechanism on the spontaneous-combustion characteristics of coal. In this paper, the previous extraction, FTIR, TPR, TG-DSC and other experimental results are combined to analyze the extraction weakening effect and the correlation analysis of the spontaneous-combustion characteristic parameters of raffinate coal. The results show that extraction can destroy the connection bond of coal molecules, change the content of dominant active groups in the coal spontaneous-combustion reaction, increase the lower limit of the key temperature nodes of coal spontaneous-combustion or extend the temperature range, resulting in an increase in the ignition-point temperature of coal and a decrease in coal quality. This paper will provide a theoretical basis for the study of the microscopic mechanism of coal spontaneous-combustion and then provide new ideas for the development of an active prevention and control technology for coal spontaneous-combustion.
Keywords: coal spontaneous-combustion; solvent extraction; key active structures; correlation analysis; weakening mechanism coal spontaneous-combustion; solvent extraction; key active structures; correlation analysis; weakening mechanism

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MDPI and ACS Style

Guo, J.; Wu, Y.; Liu, Y.; Cai, G.; Li, D.; Jin, Y. Study on the Influence Mechanism of the Key Active Structure of Coal Molecules on Spontaneous Combustion Characteristics Based on Extraction Technology. Fire 2024, 7, 283. https://doi.org/10.3390/fire7080283

AMA Style

Guo J, Wu Y, Liu Y, Cai G, Li D, Jin Y. Study on the Influence Mechanism of the Key Active Structure of Coal Molecules on Spontaneous Combustion Characteristics Based on Extraction Technology. Fire. 2024; 7(8):283. https://doi.org/10.3390/fire7080283

Chicago/Turabian Style

Guo, Jun, Yunfei Wu, Yin Liu, Guobin Cai, Dailin Li, and Yan Jin. 2024. "Study on the Influence Mechanism of the Key Active Structure of Coal Molecules on Spontaneous Combustion Characteristics Based on Extraction Technology" Fire 7, no. 8: 283. https://doi.org/10.3390/fire7080283

APA Style

Guo, J., Wu, Y., Liu, Y., Cai, G., Li, D., & Jin, Y. (2024). Study on the Influence Mechanism of the Key Active Structure of Coal Molecules on Spontaneous Combustion Characteristics Based on Extraction Technology. Fire, 7(8), 283. https://doi.org/10.3390/fire7080283

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