The effect of adsorption-induced swelling on porosity based on the transient coal swelling model
Source abstract
Abstract
Coal swelling induced by gas adsorption is a well-known phenomenon. In order to enhance coalbed methane production and greenhouse gases sequestration, adsorption phase should be understood deeply, and it is the most basic and the most important. Experimental measurements performed in this work on three samples from Kaiping Basin using carbon dioxide. Basing on Gibbs adsorption model, the steady-state swelling model is developed, which also assume that the change of the coal surface free energy induced by adsorption is equal to the change of energy caused by adsorption deformation. The mass balance equation of gas in porous media is combined with the steady-state swelling model. The dynamic variation of porosity and internal gas pressure of coal are integrated into the transient swelling model. The steady-state model and transient model are applied to describe the experimental volumetric strain. The results show good agreement between the models and the experimental strain data. The coal pore tests with different probe scales are also used to investigate the true pore size distribution and porosity, which provide more accurate parameter values. According to the transient swelling model, the effects of porosity on adsorption-induced swelling are further analyzed.
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Research context
OpenAlex topics: Coal Properties and Utilization · Hydrocarbon exploration and reservoir analysis · Methane Hydrates and Related Phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mechanics & Civil Engineering, China University of Mining and Technology (Beijing) 1 , Beijing 100083, China
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University 2 , Chongqing 400030, China
References (35)
Show source-provided references
1. Pore structure characterization of coal by synchrotron small-angle x-ray scattering and transmission electron microscopy10.1021/ef500487d ↗
2. Adsorption and strain: The CO2-induced swelling of coal10.1016/j.jmps.2010.07.014 ↗
3. Pore structure and its impact on CH4 adsorption capacity and flow capability of bituminous and subbituminous coals from Northeast China10.1016/j.fuel.2012.06.055 ↗
4. Pore structure of mortars with cellulose ether additions—Mercury intrusion porosimetry study10.1016/j.cemconcomp.2014.06.005 ↗
5. Micro-pores and fractures of coals analysed by field emission scanning electron microscopy and fractal theory10.1016/j.fuel.2015.10.011 ↗
6. Influences of magmatic intrusion on the macromolecular and pore structures of coal: Evidences from Raman spectroscopy and atomic force microscopy10.1016/j.fuel.2013.11.012 ↗
7. Experimental study on pore structure and mechanical properties of stratified coal10.1061/(asce)gm.1943-5622.0001022 ↗
8. Pore structure characterization of different rank coals using gas adsorption and scanning electron microscopy10.1016/j.fuel.2015.06.050 ↗
9. Pore structure characterization of North American shale gas reservoirs using USANS/SANS, gas adsorption and mercury intrusion10.1016/j.fuel.2012.06.119 ↗
10. Combination of coal and rock uniaxial compression test image processing of CT10.4028/www.scientific.net/amr.368-373.1374 ↗
11. The effect of coal metamorphism on methane desorption10.1016/s0016-2361(97)00177-4 ↗
12. Expansion and contraction of variable rank coals during the exchange sorption of CO2 and CH4
13. High-pressure methane and carbon dioxide adsorption on dry and moisture-equilibrated Pennsylvanian coals10.1016/s0166-5162(02)00078-2 ↗
14. Simulation of CO2 sequestration in coal beds: The effects of sorption isotherms10.1016/j.chemgeo.2004.12.021 ↗
15. Evolution of methane sorption capacity of coal seams as a function of burial history—A case study from the Campine Basin, NE Belgium10.1016/j.coal.2005.07.006 ↗
16. Changes of acoustic emission and strain in hard coal during gas sorption–desorption cycles10.1016/j.coal.2006.06.007 ↗
17. Binary gas sorption/desorption experiments on a bituminous coal: Simultaneous measurements on sorption kinetics, volumetric strain and acoustic emission10.1016/j.coal.2008.09.009 ↗
18. Absorption and adsorption of methane and carbon dioxide in hard coal and active carbon10.1021/la991515a ↗
19. A bidisperse pore diffusion model for methane displacement desorption in coal by CO2 injection10.1016/s0016-2361(03)00010-3 ↗
20. Gas sorption and the consequent volumetric and permeability change of coal II: Numerical modeling10.1007/s11242-014-0356-x ↗
21. Microcrack-based geomechanical modeling of rock-gas interaction during supercritical CO2 fracturing10.1016/j.petrol.2018.01.049 ↗
22. Evaluation of gas sorption-induced internal swelling in coal10.1016/j.fuel.2014.11.007 ↗
23. Thermodynamics of adsorption in porous materials10.1002/aic.690480115 ↗
24. 1985
25. A model of adsorption induced coal deformation based on thermodynamics approach
26. A new coal-permeability model: Internal swelling stress and fracture–matrix interaction10.1007/s11242-009-9442-x ↗
27. Swelling of Australian coals in supercritical CO210.1016/j.coal.2007.09.006 ↗
28. 1980 · 173
29. How sorption-induced matrix deformation affects gas flow in coal seams: A new FE model10.1016/j.ijrmms.2007.11.007 ↗
30. Volumetric strain associated with methane desorption and its impact on coalbed gas production from deep coal seams10.1306/05110504114 ↗
31. Adsorption-induced coal swelling and stress: Implications for methane production and acid gas sequestration into coal seams10.1029/2004jb003482 ↗
32. Adsorption-induced swelling of porous media10.1016/j.ijggc.2016.12.011 ↗
33. Using in-situ, adsorption dilatometry for assessment of micropore size distribution in monolithic carbons10.1016/j.carbon.2016.02.080 ↗
34. Evolution of pore structure in gas shale related to structural deformation10.1016/j.fuel.2017.02.035 ↗
35. Compressibility and fractal dimension of fine coal particles in relation to pore structure characterisation using mercury porosimetry10.1002/(sici)1521-4117(199905)16:1<25::aid-ppsc25>3.0.co;2-t ↗