Characteristics of Pore Structure and Fractal Dimension of Isometamorphic Anthracite

Di Gao, Meng Li, Baoyu Wang, Bin Hu and Jianguo Liu
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Di Gao: State Key Laboratory of Coal and Coalbed Methane Co-mining, Jincheng 048006, 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

Energies, 2017, vol. 10, issue 11, 1-11

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.

Keywords: isometamorphic anthracite; pore properties; fractal theory; coal-bed methane; Qinshui Basin (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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