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  • Effects of the Juxtaposition of Carbonaceous slit pores on the overall transport behavior of adsorbed fluids

    Author(s)
    Jepps, OG
    Bhatia, SK
    Searles, DJ
    Griffith University Author(s)
    Jepps, Owen
    Year published
    2005
    Metadata
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    Abstract
    It is a common approximation in the modeling of adsorption in microporous carbons to treat the pores as slit pores, whose walls are considered to consist of an infinite number of graphitic layers. In practice, such an approximation is appropriate as long as the number of graphitic layers in the wall is greater than three. However, it is understood that pore walls in microporous carbons commonly consist of three or fewer layers. As well as affecting the solid-fluid interaction within a pore, such narrow walls permit the interaction of fluid molecules through the wall, with consequences for the adsorption characteristics. We ...
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    It is a common approximation in the modeling of adsorption in microporous carbons to treat the pores as slit pores, whose walls are considered to consist of an infinite number of graphitic layers. In practice, such an approximation is appropriate as long as the number of graphitic layers in the wall is greater than three. However, it is understood that pore walls in microporous carbons commonly consist of three or fewer layers. As well as affecting the solid-fluid interaction within a pore, such narrow walls permit the interaction of fluid molecules through the wall, with consequences for the adsorption characteristics. We consider the effect that a distributed pore-wall thickness model can have on transport properties. At low density we find that the only significant deviation in the transport properties from the infinite pore-wall thickness model occurs in pores with single-layer walls. For a model of activated carbons with a distribution of pore widths and pore-wall thicknesses, the transport properties are generally insensitive to the effects of finite walls, in terms of both the solid-fluid interaction within a pore and fluid-fluid interaction through the pore walls.
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    Journal Title
    Langmuir: the ACS journal of surfaces and colloids
    Volume
    21
    Publisher URI
    http://pubs.acs.org/journal/langd5
    DOI
    https://doi.org/10.1021/la047984g
    Publication URI
    http://hdl.handle.net/10072/4950
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    • Journal articles

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