Ion transport resistance in Microbial Electrolysis Cells with anion and cation exchange membranes

T.H.J.A. Sleutels, H.V.M. Hamelers, R.A. Rozendal, C.J.N. Buisman

Research output: Contribution to journalArticleAcademicpeer-review

180 Citations (Scopus)

Abstract

Previous studies have shown that Microbial Electrolysis Cells (MECs) perform better when an anion exchange membrane (AEM) than when a cation exchange membrane (CEM) separates the electrode chambers. Here, we have further studied this phenomenon by comparing two analysis methods for bio-electrochemical systems, based on potential losses and partial system resistances. Our study reconfirmed the large difference in performance between the AEM configuration (2.1 m3 H2 m-3 d-1) and CEM configuration (0.4 m3 H2 m-3 d-1) at 1 V. This better performance was caused mainly by the much lower internal resistance of the AEM configuration (192 mO m2) compared to the CEM configuration (435 mO m2). This lower internal resistance could be attributed to the lower transport resistance of ions through the AEM compared to the CEM caused by the properties of both membranes. By analyzing the changes in resistances the limitations in an MEC can be identified which can lead to improved cell design and higher hydrogen production rates
Original languageEnglish
Pages (from-to)3612-3620
JournalInternational Journal of Hydrogen Energy
Volume34
Issue number9
DOIs
Publication statusPublished - 2009

Keywords

  • fuel-cells
  • waste-water
  • biocatalyzed electrolysis
  • hydrogen-production
  • power-generation
  • biohydrogen production
  • performance
  • acetate
  • electricity
  • technology

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