Abstract
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 language | English |
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Title of host publication | Reverse Osmosis and Ultrafiltration |
Subtitle of host publication | Based 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 |
Editors | S. Sourirajan, Takeshi Matsuura |
Place of Publication | Washington, DC |
Publisher | American Chemical Society |
Pages | 57-68 |
Number of pages | 12 |
ISBN (Electronic) | 9780841225763 |
ISBN (Print) | 9780841209213 |
DOIs | |
Publication status | Published - 1 Dec 1985 |
Event | 188th Meeting of the American Chemical Society (ACS) 1984 - Philadelphia, United States Duration: 26 Aug 1984 → 31 Aug 1984 Conference number: 188 |
Publication series
Name | ACS Symposium Series |
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Publisher | American Chemical Society |
Volume | 281 |
ISSN (Print) | 0097-6156 |
Conference
Conference | 188th Meeting of the American Chemical Society (ACS) 1984 |
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Country/Territory | United States |
City | Philadelphia |
Period | 26/08/84 → 31/08/84 |