Gas transport efficiency of ceramic membranes: comparison of different geometries

Tijana Zivkovic*, Nieck E. Benes, Henny J.M. Bouwmeester*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)
12 Downloads (Pure)


The effect of support geometry on the performance of asymmetric ceramic membranes for gas separation is analyzed. Flat plate (FP), tubular (TU) and multichannel (MC) geometries are investigated using the dusty gas model (DGM) to describe transport of a multicomponent gas mixture through the macroporous support. It is shown that: (a) the support geometry significantly affects membrane performance; (b) in the case of the multichannel geometry, the inner channels do not contribute efficiently to the overall gas transport; (c) best performance in terms of both flux and permselectivity is obtained for tubular geometry. It is furthermore clarified that for an accurate description of the transport behaviour it is crucial to properly account for the relative contributions of all different transport mechanisms (Knudsen diffusion, bulk diffusion and viscous flow) included in the DGM.
Original languageEnglish
Pages (from-to)101-108
Number of pages8
JournalJournal of membrane science
Issue number1-2
Publication statusPublished - 2004


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