Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7730378 | Journal of Power Sources | 2015 | 12 Pages |
Abstract
A common issue with anion exchange membranes (AEMs) is carbon dioxide contamination which causes a conversion from the hydroxide form to a mixed carbonate/bicarbonate form. In the mixed ionic form the membrane suffers from lower conductivity due to the larger and heavier ions having a lower mobility. The purpose of this study is to develop a theoretical model of the transient ion exchange process and elucidate the nature of the conversion of the AEM from a hydroxide form to a carbonate/bicarbonate form. Experimental data available from the literature providing the anion concentrations versus time are used for comparison. The prevalent mechanisms are discussed and the governing equations are cast in a dimensionless form. Extensions are then made to conductivity predictions.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Timothy D. Myles, Kyle N. Grew, Aldo A. Peracchio, Wilson K.S. Chiu,