Effect of mass and charge transport speed and direction in porous anodes on microbial electrolysis cell performance

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

Research output: Contribution to journalArticleAcademicpeer-review

33 Citations (Scopus)

Abstract

The use of porous electrodes like graphite felt as anode material has the potential of achieving high volumetric current densities. High volumetric current densities, however, may also lead to mass transport limitations within these porous materials. Therefore, in this study we investigated the mass and charge transport limitations by increasing the speed of the forced flow and changing the flow direction through the porous anode. Increase of the flow speed led to a decrease in current density when the flow was directed towards the membrane caused by an increase in anode resistance. Current density increased at higher flow speed when the flow was directed away from the membrane. This was caused by a decrease in transport resistance of ions through the membrane which increased the buffering effect of the system. Furthermore, the increase in flow speed led to an increase of the coulombic efficiency by 306%.
Original languageEnglish
Pages (from-to)399-403
JournalBioresource Technology
Volume102
Issue number1
DOIs
Publication statusPublished - 2011

Keywords

  • fuel-cells
  • biocatalyzed electrolysis
  • exchange membranes
  • electrical-current
  • ion-transport
  • waste-water
  • hydrogen
  • acetate
  • methane
  • systems

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