文献类型：期刊文献

英文题名：Characterization and removal of oxygen ions in LiF-NaF-KF melt by electrochemical methods

作者：Wang, Heng[1];Liu, Shizhe[1];Li, Bing[1];Zhao, Zuxin[1]

机构：[1]E China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2015

卷号：175

起止页码：28

外文期刊名：JOURNAL OF FLUORINE CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000358094400006)】；

基金：This work was financially supported by the Key Program of the National Natural Science Foundation (Grant No. 50934001), and the National Natural Science Foundation (Grant No. 51054004 and Grant No. 51274102).

语种：英文

外文关键词：Electrochemical purification; Molten Salt Reactor; oxygen ions; LiF-NaF-KF melt

摘要：LiF-NaF-KF melt is used to investigate the feasibility of using electrochemical methods to characterize and remove trace amounts of oxygen ions. Electrochemical methods including cyclic voltammograms and chronoamperometry are applied to characterize the oxidation processes of the trace oxygen ions in LiF-NaF-KF melt. The results show that the anodic peak currents vs. the square roots of scan rates is linearity passing through the origin, indicating the oxidation of oxygen ions is controlled by ions diffusion process. The dependency of the anodic peak currents vs. the concentrations of oxygen ions is also linearity when the concentration is no more than 1200 ppm. So the anodic peak current can be used to determine the oxygen ions content in the melt online. The peak currents of oxygen ions oxidation are gradually reduced after 3 h, 8 h and 20 h constant-potential electrolysis. Oxygen ions concentration is reduced to 200 ppm in LiF-NaF-KF melt after 20 h constant-potential electrolysis. (C) 2015 Elsevier B.V. All rights reserved.