Reverse electrodialysis using bipolar ion-exchange membranes as a source of electric energy
Journal Article
·
· Russian Journal of Electrochemistry
OSTI ID:75645
- Institute of Chemistry, Vladivostok (Russian Federation)
It is established that, in the regime of the H{sup +} and OH{sup {minus}} ions recombination, voltage on the bipolar membranes and the efficiency of the latter, as a transformer of chemical energy into electric, increases in the series of ionogen groups contained in the bipolar region. This is due to an increase in the recombination rate constants in the bipolar contact for the H{sup +} and OH{sup {minus}} ions. As the sodium and chlorine ions penetrate the bipolar transition region, they sharply decrease the membrane potential and the voltage drop on the bipolar membranes, because the ionogen groups turn into salt form, which is catalytically inactive in the H{sup +} and OH{sup {minus}} ions recombination reaction. It is shown that the source of current, containing the MB-24 (bipolar), MF-4sk (cation-exchange), and AMV (anion-exchange) ion-exchange membranes, has a specific power of 0.11 W/dm{sup 2} (calculated in terms of one bipolar membrane) and efficiency of 29% for 0.5 M solution of hydrochloric acid and sodium hydroxide, and 0.5 A/dm{sup 2} current density.
- OSTI ID:
- 75645
- Journal Information:
- Russian Journal of Electrochemistry, Journal Name: Russian Journal of Electrochemistry Journal Issue: 6 Vol. 30; ISSN RJELE3
- Country of Publication:
- United States
- Language:
- English
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