Experimental investigation of the macroscopic characteristic parameters and microstructure of water-soaked coal during low-temperature oxidation

He, Yongjun; Deng, Jun; Zhai, Xiaowei; Bai, Zujin; Xiao, Yang; Shu, Chi‐Min

doi:10.1007/s10973-022-11243-5

Cited by 21 publications

(1 citation statement)

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“…Coal inevitably undergoes various changes in its physical structure and surface morphology during LTO 21 , which affects the heat and mass transfer efficiency when oxidizing coal at low temperatures 22 . To illustrate, the micropores of the coal affect the maximum heat release and the initial heat release of LTO 23 .…”

Section: Introductionmentioning

confidence: 99%

Influence of mudstone on coal spontaneous combustion characteristics and oxidation kinetics analysis

Zhang,

Zou,

et al. 2024

Sci Rep

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To explore the spontaneous combustion characteristics and hazards of the low-temperature oxidation (LTO) stage in the process of spontaneous combustion of coal and mudstone, the pore structure, spontaneous combustion characteristic parameters, and exothermic characteristics of coal and mudstone were tested and studied, and the oxidation kinetic parameters were calculated. The results show that mudstone has a larger specific surface area and pore volume than coal. From the fractal characteristics, the pore structure of mudstone is more complex than that of coal. According to the comparison of theoretical and actual gas generation and oxygen consumption rate curves, it is found that there is an interaction between coal and mudstone in the LTO process. With the increase of mudstone mass ratio, gas production, and its oxygen consumption rate increase. Among them, CM-4 (Coal:Mudstone = 1:1) has the highest exothermic intensity and the exothermic factor (A) and fire coefficient (K) increase with the increase of mudstone content. The apparent activation energy of the mudstone sample is lower than that of the raw coal, indicating that the sample after adding mudstone is more likely to have spontaneous combustion in the LTO stage.

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Section: Introductionmentioning

confidence: 99%