Adsorbate transport in nanopores

Bhatia, Suresh K. ; Jepps, Owen G. ; Nicholson, David (2005) Adsorbate transport in nanopores Adsorption, 11 (1). pp. 443-447. ISSN 0929-5607

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We present a tractable theory of transport of simple fluids in cylindrical nanopores, considering trajectories of molecules between diffuse wall collisions at low-density, and including viscous flow contributions at higher densities. The model is validated through molecular dynamics simulations of supercritical methane transport, over a wide range of conditions. We find excellent agreement between model and simulation at low to medium densities. However, at high densities the model tends to over-predict the transport behaviour, due to a large decrease in surface slip that is not well represented by the model. It is also seen that the concept of activated diffusion, commonly associated with diffusion in small pores, is fundamentally invalid for smooth pores.

Item Type:Article
Source:Copyright of this article belongs to International Adsorption Society.
Keywords:Transport Phenomena; Diffusion; Nanopores; Statistical Mechanics; Slip Flow
ID Code:2924
Deposited On:09 Oct 2010 07:25
Last Modified:17 May 2011 06:11

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