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<p>This study investigated the chlorination of uranium via a gas–solid reaction between uranium hydride and flowing ammonium chloride vapor using a vertical tube furnace. The effects of argon and hydrogen concentrations in the carrier gas at 300 and 350&#xa0;°C were examined. Products were analyzed using X-ray diffraction and chloride ion selective electrode to determine phase composition and Cl:U ratios. An intermediate uranium ammonium chloride complex was evident from the Cl:U ratio, which required subsequent heating to 650&#xa0;°C to decompose to UCl<sub>3</sub>. Blending H<sub>2</sub> with argon in the carrier gas can mitigate the formation of UCl<sub>4</sub> and UO<sub>2</sub> impurities in the final product. This method provides a viable route for UCl<sub>3</sub> synthesis, avoiding the use of hazardous gases and mitigating corrosion issues associated with previous methods.</p>

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Gas–solid synthesis of UCl3 using ammonium chloride and uranium hydride

  • 期刊论文

  • 发表日期：

    2025年4月18日

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  • Diallo Barnes,
  • Nathan Rood,
  • Collin Andersen,
  • Michael F. Simpson

摘要

This study investigated the chlorination of uranium via a gas–solid reaction between uranium hydride and flowing ammonium chloride vapor using a vertical tube furnace. The effects of argon and hydrogen concentrations in the carrier gas at 300 and 350 °C were examined. Products were analyzed using X-ray diffraction and chloride ion selective electrode to determine phase composition and Cl:U ratios. An intermediate uranium ammonium chloride complex was evident from the Cl:U ratio, which required subsequent heating to 650 °C to decompose to UCl3. Blending H2 with argon in the carrier gas can mitigate the formation of UCl4 and UO2 impurities in the final product. This method provides a viable route for UCl3 synthesis, avoiding the use of hazardous gases and mitigating corrosion issues associated with previous methods.