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Characteristics of Pore Structure and Fractal Dimension of Isometamorphic Anthracite

Author

Listed:
  • Di Gao

    (State Key Laboratory of Coal and Coalbed Methane Co-mining, Jincheng 048006, China
    School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China
    Collaborative Innovation Center of Coalbed Methane (Shale Gas) for Central Plains Economic Region, Jiaozuo 454000, China)

  • Meng Li

    (School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China)

  • Baoyu Wang

    (State Key Laboratory of Coal and Coalbed Methane Co-mining, Jincheng 048006, China)

  • Bin Hu

    (School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China)

  • Jianguo Liu

    (School of Resources and Environment, Henan Polytechnic University, Jiaozuo 454000, China)

Abstract

The geologic conditions of No. 3 coal seams are similar to Sihe and Zhaozhuang Collieries, however, the gas production is significantly different. To better understand the effect of pores, by means of experimental measurements and quantitative analysis, the pore properties of high-rank isometamorphic anthracite were thoroughly studied. Our study showed that the pore structures were predominantly adsorptive, accounting for more than 88% of the specific surface area. The coal pores showed typical three-stage fractal characteristics at boundary points of 1 nm and 9 nm (7 nm of coal samples from Zhaozhuang Colliery), and the fractal dimension with 1–9 nm (or 1–7 nm), as being significantly larger than those measured outside the given ranges. Pores in samples from Sihe Colliery were mainly open spherical or ellipsoidal pores in shape; conversely, those from Zhaozhuang Colliery were mainly Y-shaped, V-shaped, or ‘ink-bottle’ type.

Suggested Citation

  • Di Gao & Meng Li & Baoyu Wang & Bin Hu & Jianguo Liu, 2017. "Characteristics of Pore Structure and Fractal Dimension of Isometamorphic Anthracite," Energies, MDPI, vol. 10(11), pages 1-11, November.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:11:p:1881-:d:119051
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    Citations

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    Cited by:

    1. Xing Zeng & Weiqiang Li & Jue Hou & Wenqi Zhao & Yunyang Liu & Yongbo Kang, 2022. "Fractal Characteristics of Pore-Throats Structure and Quality Evaluation of Carbonate Reservoirs in Eastern Margin of Pre-Caspian Basin," Energies, MDPI, vol. 15(17), pages 1-13, August.
    2. Zhenjian Liu & Zhenyu Zhang & Sing Ki Choi & Yiyu Lu, 2018. "Surface Properties and Pore Structure of Anthracite, Bituminous Coal and Lignite," Energies, MDPI, vol. 11(6), pages 1-14, June.
    3. Zhao, Pengxiang & Zhuo, Risheng & Li, Shugang & Shu, Chi-Min & Jia, Yongyong & Lin, Haifei & Chang, Zechen & Ho, Chun-Hsing & Laiwang, Bin & Xiao, Peng, 2021. "Fractal characteristics of methane migration channels in inclined coal seams," Energy, Elsevier, vol. 225(C).

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