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

Hao Sui, Xijian Li and Peng Pei
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Hao Sui: College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China
Xijian Li: College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China
Peng Pei: Mining College, Guizhou University, Guiyang 550025, China

Energies, 2022, vol. 15, issue 11, 1-11

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 ).

Keywords: tectonic coal; pore structure; adsorption capacity; fractal dimension (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: 2022
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