The binary gas sorption in the bituminous coal of the Huaibei Coalfield in China

Published on Sep 7, 2018in Adsorption Science & Technology2.425
· DOI :10.1177/0263617418798125
Lei Zhang12
Estimated H-index: 12
(CUMT: China University of Mining and Technology),
Zhiwei Ye3
Estimated H-index: 3
(CUMT: China University of Mining and Technology)
+ 3 AuthorsChen Wang6
Estimated H-index: 6
(CUMT: China University of Mining and Technology)
Sources
Abstract
Knowledge of the gas sorption characteristics of a coal not only helps to explain the mechanism of enhanced coalbed methane recovery but also provides an important basis for simultaneous coal and g...
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As a kind of associated geological gas, coalbed methane (CBM) is mainly adsorbed in the coal seam. The coal-methane adsorption phenomenon can be described by Langmuir monolayer adsorption model, BET multilayer adsorption model and the Theory of Volume Filling of Micropore (TVFM), whereas the binary gas adsorption phenomenon can be described by the extended Langmuir Model. For the CBM in the low permeability coal seam, the amount of gas released by direct drainage is relatively limited, which can...
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Cited By7
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Coalbed methane is a lucrative energy source, but its development relies heavily on the fracturing of coal seam and underground extraction during mining. This study of mining stress paths, pore pressure, and permeability of a coal body was aimed to overcome the constraints of low coal permeability under the stress applied to a coal seam group. Variation in the applied stress changes the effective stress in coal and its permeability (which also depends on pore pressure). The effects of different ...
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Abstract Compared with the pre-modification technique, such as hydraulic fracturing, the gas injected for enhanced coalbed methane recovery (ECBM) technique offers not only a good economic advantage by enhancing the CH4 recovery, but also provides an environmental benefit with CO2 storage, and the changing characteristics of the flow capacity in coal reservoir critical affect both the CH4 production and CO2 geo-sequestration. In this pursuit, the present study envisaged the determination of the ...
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The factors affecting permeability change under repeated mining of coal seams are important study aspects that need to be explored. This study combined various stress variation characteristics of protective seam mining and simplified the stress path of repeated mining in protective seam mines. Based on the results from the bespoke gas flow and displacement testing apparatus, seepage tests for simulated repetitive mining were carried out. The results simulated the actual behavior very well. With ...
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The coal permeability is known to be influenced by the pore pressure and effective stress in coal mines. In this study, the characteristics of the bituminous coal permeability response to the pore pressure and effective shear stress in the Xutuan coal mine in Huaibei Coalfield in China were investigated under different stress conditions. For this purpose, gas seepage tests with various stress levels were conducted via the original gas flow and displacement testing apparatus using bituminous coal...
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This paper presents the results of an evaluation study of gas drainability in the Bulli seam in the Southern Coalfield of the Sydney Basin, NSW, Australia, where the coal seam gas (CSG) contains a high proportion of carbon dioxide (CO2). Historically the gas drainability in some particular areas of this coal seam was found to be particularly poor, which posed a significant challenge to gas predrainage. As a result, a large volume of greenhouse gases were released to the atmosphere during mining ...
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