# 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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Abstract To determine reasonable distance of gas pre-drainage drillings in coal seams, a solid–gas coupling model that takes gas adsorption effect into account was constructed. In view of different adsorption constants, the paper conducted the numerical simulation of pre-drainage gas in drillings along coal seam, studied the relationship of adsorption constants and permeability, gas pressure, and effective drainage radius of coal seams, and applied the approach to the layout of pre-drainage gas ...
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#1Lei Zhang (CUMT: China University of Mining and Technology)H-Index: 12
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Due to the reservoir rocks are often anisotropic in permeability, and traditional permeability testing apparatus cannot well carry out the directional permeability testing. The specialised permeability apparatus known as multi-functional outburst research rig (MFORR) is used to study the directional permeability under various confining pressures, and the relevant testing method and results are introduced as well. The MFORR testing results with $$\hbox {CH}_{4}$$ of an Australian coal specimen fr...
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Accurate testing coal isotherm can play a significant role in the areas of coal seam gas drainage, outburst control, CO 2 geo-sequestration, coalbed methane (CBM) and enhanced coalbed methane recovery (ECBM) etc. The effect of particle size on the CO 2 and CH 4 sorption capacity of bituminous coal from Illawarra, Australia was investigated at 35°C and at pressure up to 4 MPa. A unique indirect gravimetric apparatus was used to measure the gas adsorption and desorption isotherms of coal of differ...
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Abstract Shale gas resources are globally abundant, and the development of these resources can increase CH 4 production. It is of interest to study the possibility of enhancing CH 4 production by CO 2 injection (enhanced gas recovery—EGR). Some studies indicate that, in shale, five molecules of CO 2 can be stored for every molecule of CH 4 produced. The technical feasibility of enhanced gas recovery (EGR) needs to be investigated in more detail. The amount of extracted natural gas from shale has...
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In order to investigate the pore characteristics of the different destroyed-types of coals and its effects of coal and gas outburst, this article studyed the low temperature nitrogen adsorption curve, specific surface area, pore volume and its distribution with the method of low-temperature nitrogen adsorption, also studed their changes with the different destroyed-type of coals, and the influences of pore shape and distribution for coal and gas outburst. The results showed that three different ...
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Abstract Spontaneous imbibition of wetting liquid into porous media is regarded as a crucially important driving mechanism for enhancing oil recovery from naturally fractured reservoir, especially with low permeability. Based on the fractal character of pores in porous media, a full analytical model for characterizing spontaneous imbibition of wetting liquid vertically into gas-saturated porous media has been derived including gravity over the entire imbibition process time frame. The weight of ...
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Applications of the fractal theory to analyze transport properties of porous media in science and engineering have received steady attention in the past two decades. However, the theory was rarely used to analyze invasion by extraneous fluids into a permeable bed where there is initially no such fluid present. Spills and leaks of non-aqueous phase liquids (NAPLs) and formation damage in drilling and completion wells are two typical examples. In this work, a fractal capillary model is proposed to...
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Cited By7
#1Lei Zhang (CUMT: China University of Mining and Technology)H-Index: 4
#2Mengqian Huang (CUMT: China University of Mining and Technology)H-Index: 2
Last. Jinghua Li (CUMT: China University of Mining and Technology)
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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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#1Lei Zhang (CUMT: China University of Mining and Technology)H-Index: 4
#1Lei ZhangH-Index: 12
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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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Abstract This study aimed to investigate the influence of cyclic hot/cold shock on the change in the permeability of coal sample under different temperature gradients. The low permeability of Chinese coal seams has always hindered the exploitation and use of coalbed methane resources. In the present study, bituminous coal produced from the Xutuan Mine was selected as the test coal sample. The hot/cold shock experiments of a number of multicycle treatments under the same temperature gradient and ...
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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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#2Ting Ren (UOW: University of Wollongong)H-Index: 25
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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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