Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
637322 | Journal of Membrane Science | 2009 | 4 Pages |
Abstract
New reproducible method for investigation of ethanol permeability of polymeric membranes in alkali media has been developed. Using the developed method ethanol crossover through KOH doped poly[2,2′-(4,4′-diphenylether)-5,5′-bibenzimidazole] (DOPBI) has been investigated with respect to alkali concentration. The permeability value, obtained in 3 M KOH was 8.6 × 10−8 cm2 s−1, which further decreased with the raise of alkali concentration. Preliminary modeled estimation showed that ethanol crossover would drop by a factor of 4 if discharge current of the cell raised by approximately 1 mA cm−2. The developed method can be expanded to measuring polymeric membrane permeability to alcohols in acidic conditions and various aqueous solutions.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Alexey Y. Leykin, Oksana A. Shkrebko, Michail R. Tarasevich,