Pore Structure of Coal Samples from Chengzhuang No. 3 Coal Seam by High-pressure Mercury Testing

Authors

  • Zenan Chen

DOI:

https://doi.org/10.54097/r5c4z086

Keywords:

Anthracite; Pore Structure; Mercuric Pressure; Adsorption.

Abstract

Matrix pores in coal reservoirs are important storage sites for adsorbed and free state CBM, and their adsorption amount is closely related to the development of pores and pore structure characteristics in coal. In this paper, the pore structure characteristics of coal and its influence on adsorption performance were studied by using the high-pressure mercuric pressure method with coal samples from No. 3 coal seam of Chengzhuang Mine as the research object. The results show that: the degree of openness of the pores of the coal samples in the study area is small, most of the pores in the coal are semi-closed pores, and the pore connectivity is poor; in the coal samples in the study area, the mesopores and macropores with a diameter larger than 100 nm are less developed, and the micropores and micropores with a diameter of less than 100 nm are developed; the pore volume of the coal samples of the No. 3 coal seam in the study area ranges from 0.0127 to 0.0168 cm3/g, with an average volume of 0.0144 cm3/g, and the pore volume content of each pore size of the samples was microporous>small pore>massive pore>medium pore; the specific surface area of the coal samples from the No. 3 coal seam in the study area ranged from 5.2259 to 6.4032 m2/g, with an average of 5.8816 m2/g, and the micropores and small pores provided a large amount of specific surface area for pores, which provided large space for the reservoir of CBM, and was favorable for the adsorption of methane gas by the pores of the coal. The above research results are intended to provide a theoretical basis for the exploitation and production of CBM in the study area.

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Published

12-06-2024

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Articles

How to Cite

Pore Structure of Coal Samples from Chengzhuang No. 3 Coal Seam by High-pressure Mercury Testing. (2024). Academic Journal of Science and Technology, 11(2), 129-132. https://doi.org/10.54097/r5c4z086

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