基于扫描电镜、孔隙-裂隙分析系统和气体吸附的煤孔隙结构联合表征

李祥春; 高佳星; 张爽; 李毅; 王梦娅; 陆卫东

doi:10.3799/dqkx.2021.195

Volume 47 Issue 5

May 2022

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Article Navigation > Earth Science > 2022 > 47(5): 1876-1889

Li Xiangchun, Gao Jiaxing, Zhang Shuang, Li Yi, Wang Mengya, Lu Weidong, 2022. Combined Characterization of Scanning Electron Microscopy, Pore and Crack Analysis System, and Gas Adsorption on Pore Structure of Coal with Different Volatilization. Earth Science, 47(5): 1876-1889. doi: 10.3799/dqkx.2021.195

Citation:

Li Xiangchun, Gao Jiaxing, Zhang Shuang, Li Yi, Wang Mengya, Lu Weidong, 2022. Combined Characterization of Scanning Electron Microscopy, Pore and Crack Analysis System, and Gas Adsorption on Pore Structure of Coal with Different Volatilization. Earth Science, 47(5): 1876-1889. doi: 10.3799/dqkx.2021.195

Citation:

Li Xiangchun, Gao Jiaxing, Zhang Shuang, Li Yi, Wang Mengya, Lu Weidong, 2022. Combined Characterization of Scanning Electron Microscopy, Pore and Crack Analysis System, and Gas Adsorption on Pore Structure of Coal with Different Volatilization. Earth Science, 47(5): 1876-1889. doi: 10.3799/dqkx.2021.195

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Combined Characterization of Scanning Electron Microscopy, Pore and Crack Analysis System, and Gas Adsorption on Pore Structure of Coal with Different Volatilization

doi: 10.3799/dqkx.2021.195

1.
School of Emergency Management and Safety Engineering, China University of Ming and Technology, Beijing 100089, China
2.
School of Safety Science and Engineering, Xinjiang Institute of Engineering, Urumqi 830023, China

Received Date: 2021-12-02
Publish Date: 2022-05-25

Abstract

Abstract

The coal nanopore structure's common characterization pattern is established by the LP-N₂GA method, CO₂ adsorption method, SEM-PCAS, and the pore characteristics of six coals with different metamorphic degrees are analyzed. The characterization model enables us to study and analyze the pores in coal more effectively, including pore number, pore area, pore perimeter, average shape factor, porosity, fractal dimension, and pore size distribution. When the pore distribution of coal samples is similar, the adsorption capacity of coal for N₂ and CO₂, the approximate probability density of porosity and pore area (mesopore) of coal samples are negatively correlated with the volatile matter of coal, and the fractal dimension of the pore of coal samples is positively correlated with the volatile matter of coal. When the pore distribution of coal samples is quite different, the maximum adsorption capacity of N₂ and CO₂ is related to the pore distribution. The combination of SEM-PCAS and gas adsorption technology facilitates the understanding of the pore characteristics of coal. The research results have specific guiding significance for coal mine gas control.
- combined characterization,
- coal porosity,
- pore structure,
- pore and crack analysis system,
- pore size distribution,
- petroleum geology

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Combined Characterization of Scanning Electron Microscopy, Pore and Crack Analysis System, and Gas Adsorption on Pore Structure of Coal with Different Volatilization

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