Hydrophilic ion-exchange membranes based on sulfonated polyethylene hollow fibers were manufactured, and their suitability for a water pervaporation process was studied for possible application in water desalination systems. The effects of the following parameters on the average water flux were determined: membrane properties (diameter (0.4 mm to 1.8 mm) and wall thickness (0.05 mm to 0.18 mm)); charge density (0.6 meq/g); and operating conditions (brine inlet temperature (30 degree C to 68 degree C), air sweep velocity (0 m/s to 6 m/s), and salt concentration in the feed brine (0 M to 3 M)). A water flux of 0.8 kg/m2h was obtained using this type of hollow fiber with an inlet brine temperature of 25 degree C to 65 degree C. It was found that, for our application, the optimal specifications for the ion-exchange hollow fibers were an outside diameter of 1.2 mm, a wall thickness of 0.1 mm, and an ion-charge density of about 1.0 meq/g. This information is required as basic data for the design of a prototype water desalination system based on a pervaporation system that uses this type of ion-exchange hollow fiber membrane.
Hydrophilic hollow fiber membranes for water desalination by the pervaporation method
Hydrophile Hohlfaser-Membranen zur Wasserentsalzung mittels Pervaporationsmethode
Chemical Engineering and Processing ; 35 , 6 ; 451-457
1996
7 Seiten, 8 Bilder, 10 Quellen
Article (Journal)
English
Water desalination by pervaporation with hollow fiber membranes
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