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    On the cavitation-like pore blocking in ink-bottle pore: Evolution of hysteresis loop with neck size

    Access Status
    Fulltext not available
    Authors
    Nguyen, P.
    Fan, Chunyan
    Do, D.
    Nicholson, D.
    Date
    2013
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Nguyen, P. and Fan, C. and Do, D. and Nicholson, D. 2013. On the cavitation-like pore blocking in ink-bottle pore: Evolution of hysteresis loop with neck size. Journal of Physical Chemistry C. 117 (10): pp. 5475-5484.
    Source Title
    Journal of Physical Chemistry C
    DOI
    10.1021/jp4002912
    ISSN
    1932-7447
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/56149
    Collection
    • Curtin Research Publications
    Abstract

    Studies of adsorption and desorption of argon at 87 K in model ink-bottle pores have been carried out using Monte Carlo simulation. We show that the isotherms can be constructed as a composite of isotherms for a set of unit cells with constant pore size. The mechanisms of adsorption and desorption in an ink-bottle pore can be easily understood from the characteristics of these unit cells, providing insight into how the hysteresis loop would evolve in shape and area when the neck size is varied. The key factor controlling the characteristics of the loop is the relative position of the condensation and evaporation pressures of these unit cells. Two features of particular interest are noted: (i) a pore blocking mechanism might be mistaken as a cavitation if cavitation is interpreted as a sudden change in the amount adsorbed along the desorption branch and (ii) the shape of the hysteresis loop switches from type H1 for small neck sizes to type H2 for larger necks but reverts back to type H1 when the neck size approaches the cavity size. © 2013 American Chemical Society.

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