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Power Generation from Concentration Gradient by Reverse Electrodialysis in Anisotropic Nanoporous Anodic Aluminum Oxide Membranes

Author

Listed:
  • Yunhyun Lee

    (Department of Mechanical Engineering, Ajou University, Suwon 443-749, Korea)

  • Hyun Jung Kim

    (Department of Mechanical Engineering, Ajou University, Suwon 443-749, Korea)

  • Dong-Kwon Kim

    (Department of Mechanical Engineering, Ajou University, Suwon 443-749, Korea)

Abstract

In this study, reverse electrodialysis power generation using an anisotropic anodic aluminum oxide membrane with nanopores of two different pore diameters is proposed and experimentally investigated for the first time. A number of experiments were carried out for various combinations of concentrations to show that the anisotropic anodic aluminum oxide membrane is superior to the conventional isotropic membrane. As a result, the highest power density that was measured from the anisotropic membrane was 15.0 mW/m 2 , and it was 7.2 times higher than that from the isotropic membrane. The reasons why the anisotropic membrane is superior to the isotropic membrane are explained in detail. The experiments on the anisotropic membranes with various active layer lengths and pore diameters were also conducted for exploring the effects of these engineering parameters on the power generation performance. As a result, it was shown that the length of the active layer is a more important engineering parameter than the pore diameter of the active layer. Additionally, it was also shown that a low concentration solution should be brought into contact with the active layer side of the membrane whenever an anisotropic membrane is used for reverse electrodialysis.

Suggested Citation

  • Yunhyun Lee & Hyun Jung Kim & Dong-Kwon Kim, 2020. "Power Generation from Concentration Gradient by Reverse Electrodialysis in Anisotropic Nanoporous Anodic Aluminum Oxide Membranes," Energies, MDPI, vol. 13(4), pages 1-15, February.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:4:p:904-:d:321910
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    References listed on IDEAS

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    1. Kim, Juwan & Kim, Sung Jin & Kim, Dong-Kwon, 2013. "Energy harvesting from salinity gradient by reverse electrodialysis with anodic alumina nanopores," Energy, Elsevier, vol. 51(C), pages 413-421.
    2. Chanda, Sourayon & Tsai, Peichun Amy, 2019. "Numerical simulation of renewable power generation using reverse electrodialysis," Energy, Elsevier, vol. 176(C), pages 531-543.
    3. Kang, Byeong Dong & Kim, Hyun Jung & Lee, Moon Gu & Kim, Dong-Kwon, 2015. "Numerical study on energy harvesting from concentration gradient by reverse electrodialysis in anodic alumina nanopores," Energy, Elsevier, vol. 86(C), pages 525-538.
    4. Alessandro Siria & Philippe Poncharal & Anne-Laure Biance & Rémy Fulcrand & Xavier Blase & Stephen T. Purcell & Lydéric Bocquet, 2013. "Giant osmotic energy conversion measured in a single transmembrane boron nitride nanotube," Nature, Nature, vol. 494(7438), pages 455-458, February.
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    Cited by:

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    2. Soo-Jin Han & Jin-Soo Park, 2021. "Understanding Membrane Fouling in Electrically Driven Energy Conversion Devices," Energies, MDPI, vol. 14(1), pages 1-11, January.

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