Experimental investigation of operating parameters in power generation by lab-scale reverse electro-dialysis (RED)

Insoo Choi, Jun Young Han, Sung Jong Yoo, Dirk Henkensmeier, Jin Young Kim, So Young Lee, Jonghee Han, Suk Woo Nam, Hyoung Juhn Kim, Jong Hyun Jang

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


The reverse electro-dialysis (RED) is a renewable technology to produce electricity by mixing of differently concentrated water. In this study, the authors fabricated lab-scale RED, and attempted to evaluate the RED performance upon different operating parameters. Firstly, the effect of salinity ratio on the RED performance was examined by varying the concentration of low-salinity water. The performance was optimized by an increase in open circuit voltage (OCV) and cell resistance with salinity ratio. Individual resistances were analyzed by electrochemical impedance spectroscopy, and their impacts on power output were addressed. Second, the effect of flow rate of salinity solutions was studied, and it was found to affect the concentration polarization in RED. Lastly, the effect of the flow rate of electrode rinse solution was investigated, which increased the ionic shortcut current and decreased boundary layer resistance accordingly. Consequently, estimations on the trends in power output by changing operating parameters were made to determine the effective operation of RED.

Original languageEnglish
Pages (from-to)1010-1019
Number of pages10
JournalBulletin of the Korean Chemical Society
Issue number7
Publication statusPublished - 2016 Jul 1

Bibliographical note

Publisher Copyright:
© 2016 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.


  • Flow rate
  • Operating parameters
  • Power output
  • Reverse electro-dialysis
  • Rinse solution
  • Salinity

ASJC Scopus subject areas

  • General Chemistry


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