Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Enhanced Desalination Performance through Nafion-coated Cathode in Capacitive Deionization

축전식 탈염에서 나피온 코팅 음극을 통한 담수화 성능 향상

  • Kim, Jieun (Department of Mechanical Engineering, Hanyang University) ;
  • Jung, Seongwoo (Department of Mechanical Engineering, Hanyang University) ;
  • Kim, Jinwook (Department of Mechanical Engineering, Hanyang University) ;
  • Kim, Jaehwan (Department of Mechanical Engineering, Hanyang University) ;
  • Kwak, Rhokyun (Department of Mechanical Engineering, Hanyang University)
  • Received : 2022.03.02
  • Accepted : 2022.06.02
  • Published : 2022.07.31
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Abstract

An effective capacitive deionization process termed membrane capacitive deionization (MCDI) is newly designed and experimentally tested for seawater desalination. By preventing co-ions to be expelled, MCDI can improve the ion removal performance, but there is a trade-off between blocking co-ion transfer and increasing contact resistance. The conventional MCDI uses 2D-shaped films which increase contact resistance and reduce desalination performance in the trade-off. In this paper, with the 3-D shape of Nafion coated activated carbon cloth, the mentioned problems are expected to be solved making the desalination performance better. We visualized ion concentration and fluid flows with half-MCDI cell that can measure only efficiency of cathode. We found the optimal number of coatings which have the better efficiency than CMX, commercial cation exchange membrane in fixed current conditions of 100uA.

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References

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