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Restoring the Reactivity of Organic Acid Solution Used for Silver Recovery from Solar Cells by Fractional Distillation

Author

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  • Jun-Kyu Lee

    (Separation and Conversion Materials Laboratory, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Jin-Seok Lee

    (Separation and Conversion Materials Laboratory, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Young-Soo Ahn

    (Separation and Conversion Materials Laboratory, Korea Institute of Energy Research, Daejeon 34129, Korea)

  • Gi-Hwan Kang

    (Photovoltaic Laboratory, Korea Institute of Energy Research, Daejeon 34129, Korea)

Abstract

Methanesulfonic acid (MSA) is used to recover silver (Ag) from solar cells by adding an oxidizing agent. It is possible to regenerate by substituting of H + for Ag + , and thus it can be reused for additional reactions. However, MSA is highly hygroscopic, and as an oxidizing agent can easily decompose in the acidic environment during Ag extraction, leading to dilution due to the formation of H 2 O. This H 2 O in the MSA solution hinders the Ag extraction. In this study, we present a fractional distillation process for restoring the reactivity of reused MSA solutions by reducing the H 2 O content. Our results showed that the reactivity of the separated MSA was restored and Ag could be recovered from the solar cell.

Suggested Citation

  • Jun-Kyu Lee & Jin-Seok Lee & Young-Soo Ahn & Gi-Hwan Kang, 2019. "Restoring the Reactivity of Organic Acid Solution Used for Silver Recovery from Solar Cells by Fractional Distillation," Sustainability, MDPI, vol. 11(13), pages 1-9, July.
    • Handle: RePEc:gam:jsusta:v:11:y:2019:i:13:p:3659-:d:245281
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    References listed on IDEAS

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    1. Kang, Sukmin & Yoo, Sungyeol & Lee, Jina & Boo, Bonghyun & Ryu, Hojin, 2012. "Experimental investigations for recycling of silicon and glass from waste photovoltaic modules," Renewable Energy, Elsevier, vol. 47(C), pages 152-159.
    2. Klugmann-Radziemska, Ewa & Ostrowski, Piotr, 2010. "Chemical treatment of crystalline silicon solar cells as a method of recovering pure silicon from photovoltaic modules," Renewable Energy, Elsevier, vol. 35(8), pages 1751-1759.
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