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Experimental Investigation on Strain Changes during CO 2 Adsorption of Raw Coal Sample: Temperature and Effective Stress

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  • Kai Wang

    (School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
    Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Qichao Fu

    (School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
    Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Xiang Zhang

    (School of Emergency Management and Safety Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China
    Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, China)

  • Hengyi Jia

    (Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing), Beijing 100083, China)

Abstract

Through laboratory simulation experiments, this paper studies the influence of different temperature and stress conditions on strain changes of raw coal samples induced by the CO 2 adsorption with tri-axial creep-seepage and adsorption-desorption experimental system. Comparing and analyzing the experimental results, the study shows that: (1) within a certain time, the axial and radial strain of the raw coal sample induced by CO 2 adsorption both show a growing trend as the adsorption time increases and the strain of the raw coal sample for CO 2 adsorption is obvious anisotropy; (2) at the same point in time, the greater the axial effective stress, the smaller the axial strain increasing rate of the loaded coal sample during CO 2 adsorption process and the smaller the value of axial deformation; (3) during the adsorption process, the volume strain of raw coal sample decreases with the increasing of temperature, namely, the adsorption capacity of raw coal sample decreases with the increasing of temperature.

Suggested Citation

  • Kai Wang & Qichao Fu & Xiang Zhang & Hengyi Jia, 2021. "Experimental Investigation on Strain Changes during CO 2 Adsorption of Raw Coal Sample: Temperature and Effective Stress," Energies, MDPI, vol. 14(3), pages 1-12, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:717-:d:490170
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    References listed on IDEAS

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    1. Vishal, V. & Singh, Lokendra & Pradhan, S.P. & Singh, T.N. & Ranjith, P.G., 2013. "Numerical modeling of Gondwana coal seams in India as coalbed methane reservoirs substituted for carbon dioxide sequestration," Energy, Elsevier, vol. 49(C), pages 384-394.
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