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    Adsorption Behavior of Hydrocarbon on Illite

    Access Status
    Fulltext not available
    Authors
    Chen, G.
    Zhang, J.
    Lu, S.
    Pervukhina, Marina
    Liu, K.
    Xue, Q.
    Tian, H.
    Tian, S.
    Li, J.
    Clennell, M.
    Dewhurst, D.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Chen, G. and Zhang, J. and Lu, S. and Pervukhina, M. and Liu, K. and Xue, Q. and Tian, H. et al. 2016. Adsorption Behavior of Hydrocarbon on Illite. Energy and Fuels. 30 (11): pp. 9114-9121.
    Source Title
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.6b01777
    ISSN
    0887-0624
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/54465
    Collection
    • Curtin Research Publications
    Abstract

    The adsorption of hydrocarbon (pure CH4 and C2H6) on illitic clay was investigated at temperatures of 333, 363, and 393 K (60, 90, and 120°C) over a range of pressures up to 30 MPa using grand canonical Monte Carlo (GCMC) simulations. We first discussed the comparability of molecular simulation results with experimental measurements. Our results indicate that molecular simulation results of the excess adsorption are comparable with the experimental measurements if they are both expressed per unit surface area available for adsorption instead of per unit mass. The gas density profiles indicate that the adsorption of CH4 and C2H6 is mainly affected by the clay surface layers. In micropores smaller than 2 nm, the overlapping of the interaction of the simulated pore walls with the gas results in enhanced density peaks. For pore sizes of 2 nm or larger, the overlapping effect is significantly reduced, and the height of the gas density peak close to the surfaces is no longer affected by pore sizes. The maximum excess adsorption of illite for C2H6 is almost twice that for CH4 due to the stronger interaction between illite and C2H6 than between illite and CH4, but the saturation capacity (maximum loading) is the same for both. Our findings may provide some insights into gas adsorption behavior in illite-bearing shales and give some guidance for improving experimental prediction.

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