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<p>It has been reported in the literature that uranium oxide can be chlorinated to UCl<sub>3</sub> or UCl<sub>4</sub> via reaction with ZrCl<sub>4</sub> in molten eutectic LiCl–KCl. However, due to its high volatility, ZrCl<sub>4</sub> is difficult to dissolve in a molten salt. A workaround is to generate the ZrCl<sub>4</sub> in-situ using a reactive metal chloride and zirconium metal. In this study, NiCl<sub>2</sub> and FeCl<sub>2</sub> were tested as the reactive metal chloride. ZrCl<sub>4</sub> was successfully generated with Zr metal concentration in the salt ranging from 1.53 to 2.09&#xa0;wt%. Nearly complete oxidant conversion was observed. The chlorination reactions leave behind a metal byproduct (Ni or Fe) that we attempted to remove using galvanic reduction onto a removable cathode. Only partial recovery (13.4% or less) of the metal byproduct was achieved on the cathode. During galvanic reduction, potential and current measurements correlated when reaction had gone to completion based on salt analysis results.</p>

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Removal of metal byproduct from in-situ generation of ZrCl4 in molten eutectic LiCl–KCl

  • 期刊论文

  • 发表日期：

    2025年12月22日

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  • C. A. Eckley,
  • Arabella Camunez,
  • Michael F. Simpson

摘要

It has been reported in the literature that uranium oxide can be chlorinated to UCl3 or UCl4 via reaction with ZrCl4 in molten eutectic LiCl–KCl. However, due to its high volatility, ZrCl4 is difficult to dissolve in a molten salt. A workaround is to generate the ZrCl4 in-situ using a reactive metal chloride and zirconium metal. In this study, NiCl2 and FeCl2 were tested as the reactive metal chloride. ZrCl4 was successfully generated with Zr metal concentration in the salt ranging from 1.53 to 2.09 wt%. Nearly complete oxidant conversion was observed. The chlorination reactions leave behind a metal byproduct (Ni or Fe) that we attempted to remove using galvanic reduction onto a removable cathode. Only partial recovery (13.4% or less) of the metal byproduct was achieved on the cathode. During galvanic reduction, potential and current measurements correlated when reaction had gone to completion based on salt analysis results.