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Cathodic Behaviour of Moisture in LiCl–KCl Eutectic Melt: Applications to Pyroprocessing

  • Litun Swain
  • Gurudas Pakhui
  • Suddhasattwa Ghosh
  • Bandi Prabhakara ReddyEmail author
Conference paper
  • 593 Downloads
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Presence of moisture in LiCl–KCl eutectic melt is known to be detrimental to its performance during electrorefining of metal fuels. Cyclic voltammetry was used to investigate the redox behaviour of LiCl–KCl eutectic melts containing moisture and compare it with chlorinated melts. Voltammetric signatures of one-step reduction of H\(_2\)O and HCl, adsorption of OH\(^{-}\), and reduction of OH\(^{-}\) to form O\(^{2-}\) were observed. Voltammograms were evaluated based on difference between onset Li\(^{+}|\)Li potential and theoretical equilibrium potential of LiCl in LiCl–KCl eutectic melt and residual cathodic current density estimated in the potential range −1.50 to −2.0 V. This two-point criteria could be helpful in ascertaining purity of eutectic melts applicable for engineering scale applications involving bulk handling of LiCl–KCl eutectic mixture.

Keywords

Pyroprocessing Moisture Impurities Cyclic voltammetry Theoretical equilibrium potential 

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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Litun Swain
    • 1
  • Gurudas Pakhui
    • 2
  • Suddhasattwa Ghosh
    • 2
  • Bandi Prabhakara Reddy
    • 2
    Email author
  1. 1.Homi Bhabha National Institute (HBNI)Indira Gandhi Centre for Atomic ResearchKalpakkamIndia
  2. 2.Materials Chemistry & Metal Fuel Cycle GroupIndira Gandhi Centre for Atomic ResearchKalpakkamIndia

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