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Study on the Influence of Characteristics of Pore Structure on Adsorption Capacity of Tectonic Coals in Guizhou Province

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  • Hao Sui

    (College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China
    Mining College, Guizhou University, Guiyang 550025, China)

  • Xijian Li

    (College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China
    Mining College, Guizhou University, Guiyang 550025, China)

  • Peng Pei

    (Mining College, Guizhou University, Guiyang 550025, China)

Abstract

The occurrence and migration of coalbed methane (CBM) is inseparably associated with the pore structure within the coal seams. Three Permian Longtan Formation tectonic coal samples (QL, XL, XT) from Guizhou Province were studied to determine pore size distribution and characteristics, as well as factors that influence adsorption. Adsorption test results show that all samples generally have “ink bottle”-type pores, with large pore capacity but poor connectivity. Furthermore, the fractal dimension D f , the tortuosity “ τ ”, and tortuous fractal dimension D T of samples were calculated. Among the studied tectonic coals, moisture, ash, tortuosity, and volatile fraction have a positive effect on the maximum adsorption capacity ( V L ), whereas intact coals’ tortuosity volatile has a negative correlation with the maximum adsorption capacity ( V L ).

Suggested Citation

  • Hao Sui & Xijian Li & Peng Pei, 2022. "Study on the Influence of Characteristics of Pore Structure on Adsorption Capacity of Tectonic Coals in Guizhou Province," Energies, MDPI, vol. 15(11), pages 1-11, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:3996-:d:826949
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    References listed on IDEAS

    as
    1. Jianguo Zhang & Xiyuan Li & Jihong Jiao & Jianbao Liu & Feng Chen & Zhimin Song, 2021. "Comparative Study of Pore Structure Characteristics between Mudstone and Coal under Different Particle Size Conditions," Energies, MDPI, vol. 14(24), pages 1-10, December.
    2. Donghyeon Kim & Youngjin Seo & Juhyun Kim & Jeongmin Han & Youngsoo Lee, 2019. "Experimental and Simulation Studies on Adsorption and Diffusion Characteristics of Coalbed Methane," Energies, MDPI, vol. 12(18), pages 1-16, September.
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