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    Research of CO 2 and N 2 Adsorption Behavior in K-Illite Slit Pores by GCMC Method

    Access Status
    Open access via publisher
    Authors
    Chen, G.
    Lu, S.
    Zhang, J.
    Xue, Q.
    Han, T.
    Xue, H.
    Tian, S.
    Li, J.
    Xu, C.
    Pervukhina, Marina
    Clennell, B.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Chen, G. and Lu, S. and Zhang, J. and Xue, Q. and Han, T. and Xue, H. and Tian, S. et al. 2016. Research of CO2 and N2 Adsorption Behavior in K-Illite Slit Pores by GCMC Method. Scientific Reports. 6: Article ID 37579.
    Source Title
    Scientific Reports
    DOI
    10.1038/srep37579
    ISSN
    2045-2322
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/55004
    Collection
    • Curtin Research Publications
    Abstract

    Understanding the adsorption mechanisms of CO2 and N2 in illite, one of the main components of clay in shale, is important to improve the precision of the shale gas exploration and development. We investigated the adsorption mechanisms of CO2 and N2 in K-illite with varying pore sizes at the temperature of 333, 363 and 393 K over a broad range of pressures up to 30 MPa using the grand canonical Monte Carlo (GCMC) simulation method. The simulation system is proved to be reasonable and suitable through the discussion of the impact of cation dynamics and pore wall thickness. The simulation results of the excess adsorption amount, expressed per unit surface area of illite, is in general consistency with published experimental results. It is found that the sorption potential overlaps in micropores, leading to a decreasing excess adsorption amount with the increase of pore size at low pressure, and a reverse trend at high pressure. The excess adsorption amount increases with increasing pressure to a maximum and then decreases with further increase in the pressure, and the decreasing amount is found to increase with the increasing pore size. For pores with size greater larger thaN2 nm, the overlap effect disappears.

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