High pressure methane adsorption of medium and high-rank coal in southern Qinshui basin

HAN Sijie; SANG Shuxun; LIANG Jingjing

doi:10.3969/j.issn.1001-1986.2018.05.002

Volume 46 Issue 5

Oct. 2018

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COAL GEOLOGY & EXPLORATION > 2018 > 46(5): 10-18,25. > DOI: 10.3969/j.issn.1001-1986.2018.05.002

HAN Sijie, SANG Shuxun, LIANG Jingjing. High pressure methane adsorption of medium and high-rank coal in southern Qinshui basin[J]. COAL GEOLOGY & EXPLORATION, 2018, 46(5): 10-18,25. DOI: 10.3969/j.issn.1001-1986.2018.05.002

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High pressure methane adsorption of medium and high-rank coal in southern Qinshui basin

1. Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of Education, China University of Mining & Technology, Xuzhou 221008, China;
2. School of Resource and Earth Sciences, China University of Mining & Technology, Xuzhou 221116, China

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The Key Program of the National Natural Science Foundation of China(41330638)

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Received Date: May 20, 2018
Published Date: October 24, 2018

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Abstract

Abstract

Methane adsorption is a physical process occurring in the inner-surface of coal pores. The pore network in coals provides plenty of accommodation for medium and high-pressure methane adsorption. In this study, we conducted high-pressure methane adsorption on southern Qinshui medium and high rank coals. We further discuss the relationship between adsorption parameters obtained from modified D-R model and coal properties and porosity characters. The results indicate that the effect of coal properties on the maximum adsorption capacity and heat of adsorption is a multi-factor-related superimposition. There is a discernible positive correlation between the maximum adsorption capacity with micropore volume and the revised parameter of adsorption amount with specific surface area of macro-mesopore. Methane molecule may display different adsorption behavior according to the pore width on the coal inner surface. On the basis of above observations, a primary understanding of high-pressure methane adsorption in relation to different pore width was proposed, which may provide a new insight of methane adsorption mechanism.
- pore width,
- high pressure adsorption,
- a modified D-R model,
- micropore filling,
- middle and high-rank coal,
- southern Qinshui basin

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References

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High pressure methane adsorption of medium and high-rank coal in southern Qinshui basin

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