Abstract
Reverse electrodialysis(RED) is an energy conversion technology to convert chemical energy generated by concentration gradient into electrochemical energy. Mixing of two bodies with different concentration is common phenomena observed at places where river water meets sea water. When two bodies are mixed, energy of high concentration body suddenly transport to that of low concentration body. It is too short to extract the energy from the process. Thus, controlled concentration gradient could be formed in RED stacks which are alternately arranged by a cation- and an anion-exchange membrane between two electrodes. For the application of RED in several field sites, most of the technology using membranes needs fouling control to minimize a decrease in performance. In this study, the fouling phenomena of ion exchange membranes for various foulants possibly found in seawater and river water were investigated. Electrical resistance is used as indicator to evalue the degree of contamination by positively, negatively and non-charged foulants. The fouled membranes were regenerated, and the electric resistance and the degree of contamination with regeneration time were measured.AcknolwedgmentThis work was conducted under the framework of the Research and Development Program of the Korea Institute of Energy Research (KIER) (Project Number: B9-2441).
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