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Direct separation of uranium from lanthanides (La, Nd, Ce, Sm) in oxide mixture in LiCl-KCl eutectic melt
Liu YL(刘雅兰); Liu K(刘奎); Luo LX(罗利霞); Yuan LY(袁立永); Chai ZF(柴之芳); Shi WQ(石伟群); Liu, YL; Liu, K; Luo, LX; Yuan, LY; Chai, ZF; Shi, WQ
2018
Source PublicationELECTROCHIMICA ACTA
ISSN0013-4686
EISSN1873-3859
Volume275Pages:100-109
SubtypeArticle
AbstractThis paper reports the direct separation of U from lanthanides (Ln) in oxide mixtures in LiCl-KCl eutectic, a method that could simplify the pyrometallurgical reprocessing of UO2-based spent fuels. In the melt, the mixture of UO2 and lanthanide oxides (Ln(2)O(3)/LnO(2)) was chloridized by AlCl3, and then U was selectively recovered by forming U-Al alloys through the redox reactions of U(IV)/U(III) and U(III)/AlxU. The results showed that U could be efficiently separated from lanthanides with high separation factors (SFU/La = 1.1 x 10(4), SFU/Ce = 1.6 x 10(5), and SFU/Sm = 2.5 x 10(4)). X-ray diffraction analysis indicated the predominant separation products to be Al3U and Al4U, whereas the real extraction rate of U was probably affected by trace amounts of O2- in the melt. For the first time, single-cell operation to separate U from Ln in mixed oxides is shown to be feasible by using AlCl3 as chlorination agent followed by electrodeposition. (c) 2018 Elsevier Ltd. All rights reserved.
KeywordUranium Lanthanides Separation Oxide mixtures LiCl-KCl eutectic
DOI10.1016/j.electacta.2018.04.140
WOS KeywordMOLTEN-SALT ; ELECTROLYTIC REDUCTION ; ELECTROCHEMICAL REDUCTION ; CHLORIDE MELTS ; RARE-EARTHS ; UO2 ; TH ; PU ; CHLORINATION ; EXTRACTION
Indexed BySCI ; EI
Language英语
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000432564500012
EI Accession Number20181805125347
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/285919
Collection多学科研究中心
Corresponding AuthorShi WQ(石伟群)
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Corresponding Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Liu YL,Liu K,Luo LX,et al. Direct separation of uranium from lanthanides (La, Nd, Ce, Sm) in oxide mixture in LiCl-KCl eutectic melt[J]. ELECTROCHIMICA ACTA,2018,275:100-109.
APA 刘雅兰.,刘奎.,罗利霞.,袁立永.,柴之芳.,...&Shi, WQ.(2018).Direct separation of uranium from lanthanides (La, Nd, Ce, Sm) in oxide mixture in LiCl-KCl eutectic melt.ELECTROCHIMICA ACTA,275,100-109.
MLA 刘雅兰,et al."Direct separation of uranium from lanthanides (La, Nd, Ce, Sm) in oxide mixture in LiCl-KCl eutectic melt".ELECTROCHIMICA ACTA 275(2018):100-109.
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