Journal of Electrochemical Science and Technology

  • 제13권2호
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  • Pages.279-291
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  • 2022
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  • 2093-8551(pISSN)
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  • 2288-9221(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
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Studying Thermochemical Conversion of Sm2O3 to SmCl3 using AlCl3 in LiCl-KCl Eutectic Melt

  • Samanta, Nibedita (Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research) ;
  • Chandra, Manish (Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research) ;
  • Maji, S. (Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research) ;
  • Venkatesh, P. (Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research) ;
  • Annapoorani, S. (Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research) ;
  • Jain, Ashish (Homi Bhabha National Institute, Indira Gandhi Centre for Atomic Research)
  • 투고 : 2021.09.27
  • 심사 : 2022.01.03
  • 발행 : 2022.05.28
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초록

In this report the thermochemical conversion of Sm2O3 to SmCl3 using AlCl3 in LiCl-KCl melt at 773 K is discussed. The final product was a mixture of SmCl3, Al2O3, unreacted Sm2O3 and AlCl3 in the chloride melt. The electrochemical attributes of the mixture was analyzed with cyclic voltammetry (CV) and square wave voltammetry (SWV). The crystallographic phases of the mixture were studied with X-ray diffraction (XRD) technique. The major chemical conversion was optimized by varying the effective parameters, such as concentrations of AlCl3, duration of reaction and the amount of LiCl-KCl salt. The extent of conversion and qualitative assessment of efficiency of the present protocol were evaluated with fluorescence spectroscopy, UV-Vis spectrophotometry and inductively coupled plasma atomic emission spectroscopy (ICP-AES) studies of the mixture. Thus, a critical assessment of the thermochemical conversion efficiency was accomplished by analysing the amount of SmCl3 in LiCl-KCl melt. In the process, a conversion efficiency of 95% was achieved by doubling the stoichiometric requirement of AlCl3 in 50 g of LiCl-KCl salt. The conversion reaction was found to be very fast as the reaction reached equilibrium in 15 min.

키워드

과제정보

The authors would like to thank Mrs. A. Lali, MC&MFCG, IGCAR for valuable discussion.

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