멤브레인 (Membrane Journal)

  • 제30권5호
  • /
  • Pages.350-358
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  • 2020
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  • 1226-0088(pISSN)
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  • 2288-7253(eISSN)
한국막학회 (The Membrane Society of Korea)
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Nafion과 Aminated Polyphenylene Oxide (APPO)를 적용한 막 축전식 탈염 공정의 성능 연구

Performance Study of Membrane Capacitive Deionization (MCDI) Cell Constructed with Nafion and Aminated Polyphenylene Oxide (APPO)

  • 김지수 (한남대학교 화공신소재공학과) ;
  • 임지원 (한남대학교 화공신소재공학과)
  • Kim, Ji Su (Department of Advanced Materials and Chemical Engineering, Hannam University) ;
  • Rhim, Ji Won (Department of Advanced Materials and Chemical Engineering, Hannam University)
  • 투고 : 2020.10.16
  • 심사 : 2020.10.24
  • 발행 : 2020.10.31
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초록

본 연구에서는 다공성 탄소 전극의 음극과 양극 표면에 각각 양이온교환고분자(Nafion)와 음이온교환고분자(aminated polyphenylene oxide, APPO)를 코팅하여 막 결합형 축전식 탈염(membrane capacitive deionization, MCDI) 공정에 적용하였다. 또한 위 공정의 성능을 탄소 전극만으로 구성한 축전식 탈염(capacitive deionization, CDI) 공정과 비교 평가해 보고 염 제거 효율이 최대로 나타나는 MCDI 공정의 최적 운전 조건을 탐색하고자 하였다. 염 제거 효율은 MCDI 공정이 CDI 공정에 비해 높게 나타났으며 Nafion과 APPO를 적용한 MCDI 공정에서 흡착 조건이 1.2 V, 3 min이고 탈착 조건이 -1.0 V, 1 min 일 때의 염 제거 효율이 82.1%로 최댓값을 보임을 확인했다.

A membrane capacitive deionization (MCDI) cell is constructed by applying thin layer of a cation exchange membrane (Nafion) on cathode and an anion exchange membrane (aminated polyphenylene oxide, APPO) on anode. Compared to CDI cell without CEM and AEM coating, MCDI exhibits enhanced salt removal efficiency. When Nafion and APPO are used as CEM and AEM, optimized salt removal performance as high as 82.1% is observed when 1.2 V is applied for 3 min during absorption process and -1.0 V is applied for 1 min during desorption.

키워드

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