Characteristics of Oxidation Reaction of Rare-Earth Chlorides in Eutectic Chloride Melt

作     者：Yung-Zun Cho Hee-Chul Yang Hee-Chul Eun Eung-Ho Kim In-Tae Kim 

作者机构：Advanced Fuel Cycle Process DevelopmentKorea Atomic Energy Research InstituteDaejeon 305-353Korea 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2007年第25卷第S1期

页      面：13-16页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the Nuclear R&D Program by the Korean Ministry of Science and Technology 

主　　题：oxidation reaction oxygen sparging flow regime conversion efficiency rare earths 

摘      要：Oxidation reaction of rare earth chlorides(Ce/Pr/Nd/EuCl3) in a LiCl-KCl eutectic molten salt was carried out using an oxygen sparging method. Regardless of the sparging time and the molten salt temperature, oxychlorides (NdOCl, PrOCl) and oxides(CeO, Eu2O3, PrO2) were formed as a oxidation products(i.e. precipitates) by the reaction with oxygen. The conversion efficiency of the rare earth elements to the precipitates increases with the sparging time and the molten salt temperature. In the conditions of 650 ℃ of a molten salt temperature and 420 min of a sparging time, the values of the conversion efficiency of the used rare earth chlorides were over 99.9%. Information on the hydrodynamics of an oxygen-molten salt two phase flow system is essential since its hydrodynamics strongly affect the oxidation reaction of rare earth elements in an eutectic chloride melts.