Removal of chloride from ethylene glycol solution using alumina/zeolite membrane as a physical boundary between the organic and aqueous phases

Tomohito Kameda, Chisato Shoji, Shoko Fukushima, Guido Grause, Toshiaki Yoshioka

Research output: Contribution to journalComment/debate

6 Citations (Scopus)

Abstract

The permeation of Cl- ions from a NaCl/ethylene glycol (EG) solution during electrodialysis was investigated using alumina and alumina/zeolite membranes. Voltage changes had very little effect on Cl- permeation through the alumina membrane, suggesting that the driving force for the permeation was concentration-gradient-induced diffusion, and not the electric field. Solvation of the Na+ ions by EG resulted in EG migration through the membrane. Replacement of the deionized water (electrolyte) in the anodic cell with NaOH resulted in increased Cl- permeation, although a greater amount of EG migrated into the NaOH solution as well. No notable difference was observed in Cl- permeation through the alumina and alumina/zeolite membranes, but EG migration decreased when using the latter membrane, suggesting that EG migration was prevented by the zeolite layer. The proposed alumina/zeolite membrane is, hence, useful for solvent recovery by electrodialysis, but its mechanical stability must be improved for industrial applications.

Original languageEnglish
Pages (from-to)404-408
Number of pages5
JournalJournal of Material Cycles and Waste Management
Volume15
Issue number3
DOIs
Publication statusPublished - 2013 Jan 1

Keywords

  • Alumina membrane
  • Alumina/zeolite membrane
  • Chloride
  • Electrodialysis
  • Ion permeation

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Mechanics of Materials

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