Kinetic Study of Hydrothermal Leaching of Lithium Cobalt Oxide with Citric Acid

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  • Azuma Daiki
    Graduate School of Environmental Studies, Tohoku University
  • Aikawa Tatsuya
    Graduate School of Environmental Studies, Tohoku University
  • Hiraga Yuya
    Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Tohoku University
  • Watanabe Masaru
    Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Tohoku University
  • Smith Jr. Richard Lee
    Graduate School of Environmental Studies, Tohoku University Research Center of Supercritical Fluid Technology, Department of Chemical Engineering, Tohoku University

Bibliographic Information

Other Title
  • クエン酸を用いたコバルト酸リチウムの水熱酸浸出における速度論解析
  • クエンサン オ モチイタ コバルトサン リチウム ノ スイネツサン シンシュツ ニ オケル ソクドロン カイセキ

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Description

<p>With a view to constructing a resource circulation system for lithium ion batteries, we attempted to recover lithium and cobalt ions by hydrothermal citric acid leaching into water. Under reaction conditions in the range of 100–200°C, 5–30 min, and 0.1–1.0 M citric acid, leaching efficiency of lithium and cobalt was found to increase with reaction temperature, time and citric acid concentration, and recovery of both metals exceeded 80%. To elucidate the reaction mechanism, leaching rate constants of lithium and cobalt were calculated based on the unreacted core or shrinking core model. It was found that the leaching behavior was expressed by the product layer controlled model in the unreacted core model, and the leaching rate constants of lithium and cobalt are approximately linearly dependent on the proton concentration.</p>

Journal

  • KAGAKU KOGAKU RONBUNSHU

    KAGAKU KOGAKU RONBUNSHU 45 (4), 147-157, 2019-07-20

    The Society of Chemical Engineers, Japan

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