Thermodynamic resistance to matter flow at the interface of a porous membrane

Glavatskiy, K. S. and Bhatia, Suresh K. (2016) Thermodynamic resistance to matter flow at the interface of a porous membrane. Langmuir, 32 14: 3400-3411. doi:10.1021/acs.langmuir.6b00375

Author Glavatskiy, K. S.
Bhatia, Suresh K.
Title Thermodynamic resistance to matter flow at the interface of a porous membrane
Journal name Langmuir   Check publisher's open access policy
ISSN 0743-7463
Publication date 2016-04-12
Year available 2016
Sub-type Article (original research)
DOI 10.1021/acs.langmuir.6b00375
Open Access Status Not yet assessed
Volume 32
Issue 14
Start page 3400
End page 3411
Total pages 12
Place of publication Washington, DC, United States
Publisher American Chemical Society
Collection year 2017
Language eng
Formatted abstract
Nanoporous materials are important in industrial separation, but their application is subject to strong interfacial barriers to the entry and transport of fluids. At certain conditions the fluid inside and outside the nanoporous material can be viewed as a two-phase system, with an interface between them, which poses an excess resistance to matter flow. We show that there exist two kinds of phenomena which influence the interfacial resistance: hydrodynamic effects and thermodynamic effects, which are independent of each other. Here, we investigate the role of the thermodynamic effects in carbon nanotubes (CNTs) and slit pores and compare the associated thermodynmic resistance with that due to hydrodynamic effects traditionally modeled by the established Sampson expression. Using CH4 and CO2 as model fluids, we show that the thermodynamic resistance is especially important for moderate to high pressures, at which the fluid within the CNT or slit pore is in the condensed state. Further, we show that at such pressures the thermodynamic resistance becomes comparable with the internal resistance to fluid transport at length scales typical of membranes used in fuel cells, and of importance in membrane-based separation, and nanofluidics in general.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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