Structure, Permeability, and Separation Characteristics of Porous Alumina Membranes

A.F.M. Leenaars*, K. Keizer, A.J. Burggraaf

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

6 Citations (Scopus)


In this paper a survey is given on ceramic, porous γ-Al2O3 membranes. The information of the membranes can be described with a slibcasting model. This means that the layer thickness of the membranes increases linearly with the square root of the dipping time. The pores of these membranes are slit-shaped and the pore size depends on the temperature/time treatment. It amounts 2.7 nm and 4.8 nm at temperatures of 400°C and 800°C respectively while the porosity remains constant in this temperature range (> 50%).

The water permeability is proportional to the pressure drop till at least 50 bar and inversely proportional to the membrane thickness. In ultrafiltration experiments the 'cut off' value of the membrane with 2.7 nm pores is 2000 for polyethylene glycols. The membrane surface can be modified with several types of ions and therefore these types of membranes can be made suitable for gas separation and hyperfiltration applications.
Original languageEnglish
Title of host publicationReverse Osmosis and Ultrafiltration
Subtitle of host publicationBased on a symposium sponsored by the Division of Industrial and Engineering Chemistry at the 188th Meeting of the American Chemical Society, Philadelphia, Pennsylvania, August 26-31, 1984
EditorsS. Sourirajan, Takeshi Matsuura
Place of PublicationWashington, DC
PublisherAmerican Chemical Society
Number of pages12
ISBN (Electronic) 9780841225763
ISBN (Print)9780841209213
Publication statusPublished - 1 Dec 1985
Event188th Meeting of the American Chemical Society (ACS) 1984 - Philadelphia, United States
Duration: 26 Aug 198431 Aug 1984
Conference number: 188

Publication series

NameACS Symposium Series
PublisherAmerican Chemical Society
ISSN (Print)0097-6156


Conference188th Meeting of the American Chemical Society (ACS) 1984
Country/TerritoryUnited States


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