Kinetics of the Reduction of Rare Earth Metals in LiCl–KCl–CsCl Eutectic Melt

Shchetinskiy, A. V.; Kharina, E. A.; Volkovich, Vladimir A.; Dedyukhin, A. S.; Рыжов, А. А.

doi:10.1149/08614.0351ecst

Cited by 1 publication

(2 citation statements)

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“…The results obtained by CP and CV methods show a consistent trend, that is, the diffusion coefficients of La(III) are positively correlated with the temperature, which indicates that our work is reliable. Meanwhile, taking the diffusion coefficients calculated at 683 K in Table as an example, it can be found that it is one order of magnitude lower than that of La(III) at 683–813 K in LiCl–KCl. ,, The presence of Cs(I) has an obvious effect on the diffusion coefficients of La(III).…”

Section: Resultsmentioning

confidence: 97%

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Electrochemical Behaviors and Extraction of Ln(III) (Ln = La, Ce, Nd) Ions in LiCl–KCl–CsCl Eutectic Salts at Low Temperatures

Liu

Wang

Jiang

et al. 2023

ACS Sustainable Chem. Eng.

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The LiCl–KCl–CsCl eutectic salt is expected to be used as a melt medium for the pyrochemical process of spent fuels because of its low melting point properties that reduce the temperature resistance requirements of the equipment. In this work, the electrochemical behaviors of La(III), Ce(III), and Nd(III) ions in the LiCl–KCl–CsCl eutectic salt in the range of 563–683 K were investigated, and it was found that the difficulty of cathodic passivation was in the order of La(III) < Ce(III) < Nd(III). Cyclic voltammetry (CV) and chronopotentiometry (CP) methods were conducted to determine the diffusion coefficients of La(III), Ce(III), and Nd(III). The corresponding diffusion activation energies were also calculated. It was also found that the passivation phenomenon does not affect the equilibrium potentials of La(III), Ce(III), and Nd(III), so we determined the apparent electrode potentials of La(III) and Ce (III) in the range of 563–683 K and Nd(III) in the range of 623–683 K by the galvanostatic voltammetry (GV) method. Finally, Ce and Nd metals were successfully extracted by potentiostatic electrolysis at 563 K for 4 h.

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Section: Resultsmentioning

confidence: 97%

“…Meanwhile, taking the diffusion coefficients calculated at 683 K in Table 1 as an example, it can be found that it is one order of magnitude lower than that of La(III) at 683−813 K in LiCl−KCl. 46,67,68 The presence of Cs(I) has an obvious effect on the diffusion coefficients of La(III).…”

Section: ■ Results and Discussionmentioning

confidence: 99%