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Membrane Water Treatment
  Volume 14, Number 2, March 2023 , pages 55-63

Cation exchange membrane and anion exchange membrane aided electrolysis processes for hypochlorite generation
Seong K. Kim, Dong-Min Shin and Ji Won Rhim

    In this study, the influence of different IEMs (ion exchange membranes) to performance of the hypochlorite electrolysis unit with Cl2 recovery stream was investigated. More specifically, Nafion 117—a representative cation exchange membrane (CEM)—and aminated polypheylene oxide (APPO)—an anion exchange membrane (AEM)—were installed in the hypochlorite electrolysis unit, and the performance and the energy efficiency of the units were evaluated and compared. Regardless of whether CEM (Nafion 117) or AEM (APPO) was installed, the rate of hypochlorite generation was increased (by up to 24.3% and 22.2% for Nafion 117 and APPO, respectively) compared with the unit without an IEM. On the other hand, the power efficiency and the optimum operation condition of hypochlorite production units seem to depend on the conductivity and stability of the installed IEM. As the result, between Nafion 117 and APPO, higher performance and efficiency were achieved with Nafion 117, due to excellent conductivity and stability of the membrane.
Key Words
    APPO; electrolysis; hypochlorite; ion exchange membrane; Nafion; virus removal
Seong K. Kim, Dong-Min Shin and Ji Won Rhim: Department of Chemical Engineering, Hannam University, 1646 Yuseongdae-ro, Yuseong-gu, Daejeon, 34054, Republic of Korea

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