Study on current–voltage curves of composite bipolar membrane for water and methanol solutions

✍ Scribed by Tzu-Jen Chou; Po-Da Hong; Akihiko Tanioka

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 174 KB
• Volume: 75
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000328)75:13<1597::aid-app5>3.0.co;2-g

✦ Synopsis

The current-voltage curves of a composite bipolar membrane (CBM) were experimentally measured by inserting the thin poly(acrylonitrile) (PAN) membrane between cation-and anion-exchange membranes for water and methanol solutions. In each solution system, 0.05 mol/L LiCl was used as the electrolyte. The measured results show that the thin PAN membranes enhanced the water-and methanol-splitting effect. This phenomenon can be explained by the protonation-deprotonation reactions occurring between the functional group of PAN (OC'N, cyano) and the water or methanol molecules in the intermediate region of the CBM. The effect of niobium alloy (Nb 3 Ga), fullerene (C 60 ) and titanium oxide (TiO 2 ) existing in the intermediate region of the CBM was also experimentally examined in this study. It was found that the effect of these compounds on water or methanol-splitting was not obvious.