Experimental studies on pore size change of porous ceramic membranes after modification

Jerry Lin, A. J. Burggraaf

Research output: Contribution to journalArticle

133 Citations (Scopus)

Abstract

Experimental results on pore size change of a microfiltration (MF) α-alumina membrane and an ultrafiltration (UF) γ-alumina membrane after modification by chemical vapor deposition (CVD) of solid oxides in the membrane pores are presented and explained using the results of a theoretical analysis. With an approx. 10-fold reduction in permeability, the average pore size of the MF membrane is found to increase after CVD modification, due to its relatively broader initial pore size distribution with a small amount of large pores and due to the particular CVD conditions (heterogeneous deposition mechanism) which give a pore narrowing rate independent of pore size. The effective pore size of the UF membrane appears to remain unchanged after modification with an approx. 50-fold reduction in permeability, as a result of the slit-shaped pores of the γ-alumina film and the particular modification conditions. The experimental and theoretical results suggest that, in order to reduce effectively the average pore size of a membrane by a modification process, the membrane should have a rather uniform pore size distribution, or the modification process should be conducted under conditions which give a pore narrowing rate proportional to the pore size.

Original languageEnglish (US)
Pages (from-to)65-82
Number of pages18
JournalJournal of Membrane Science
Volume79
Issue number1
DOIs
StatePublished - Apr 26 1993
Externally publishedYes

Fingerprint

Ceramic membranes
Ceramics
Pore size
ceramics
membranes
porosity
Membranes
Aluminum Oxide
Chemical vapor deposition
Ultrafiltration
Microfiltration
Alumina
Permeability
aluminum oxides
vapor deposition
Oxides
permeability
slits

Keywords

  • ceramic membranes
  • gas separations
  • membrane modification, pore size change
  • membrane preparation and structure

ASJC Scopus subject areas

  • Filtration and Separation
  • Polymers and Plastics

Cite this

Experimental studies on pore size change of porous ceramic membranes after modification. / Lin, Jerry; Burggraaf, A. J.

In: Journal of Membrane Science, Vol. 79, No. 1, 26.04.1993, p. 65-82.

Research output: Contribution to journalArticle

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