Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7043422 | Separation and Purification Technology | 2019 | 6 Pages |
Abstract
The extraction and recycle of thorium is an essential step in the thorium-uranium closed fuel cycle designed for Thorium-based Molten Salt Reactor system (TMSR), and the separation of thorium from FPs especially lanthanides is a key issue in the thorium recovery. In this paper, the electrochemical behaviors of Th(IV) and Ce(III) on Mo electrode were studied by cyclic voltammetry (CV) and chronopotentiometry (CP) techniques at 773â¯K in ThF4(3â¯wt%)/CeF3(0.3â¯wt%)-LiCl-KCl ternary melt and CeF3(0.3â¯wt%)-ThF4(3â¯wt%)-LiCl-KCl quaternary melt, respectively. The reduction peaks of Th(IV)/Th(0) and Ce(III)/Ce(0) were at â1.83â¯V and â2.21â¯V (vs. Ag/AgCl) in the respective ternary melt, respectively, which were same with the values in the quaternary melt; however, the oxidation peaks in the CeF3-ThF4-LiCl-KCl melt shifted negatively about 0.1â¯V. Pulsed potential electrolysis of quaternary melt revealed that 98.9% of Th(IV) can be electrochemical separated from the melt with almost all cerium remaining in the melt, based on the inductively coupled plasma atomic emission spectrometer (ICP-AES) results.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Xianbin Wang, Haiyang Zheng, Qianhui Xu, Tiejian Zhu, Feng Jiang, Changfeng She, Chenyang Wang, Haixia Cong, Yu Gong, Wei Huang, Qingnuan Li,