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

摘要：

Oxidation reaction of rare earth chlorides (Ce/Pr/Nd/EuCl<,3>) 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<,2>, Eu<,2>O<,3>, PrO<,2>) 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 420min 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 oxygenmolten salt two phase flow system is essential since its hydrodynamics strongly affect the oxidation reaction of rare earth elements in an eutectic chloride melts.

关键词： oxidation reaction oxygen sparging flow regime conversion efficiency rare earths

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

作者单位: Advanced Fuel Cycle Process Development, Korea Atomic Energy Research Institute, Daejeon 305-353, Korea

会议类型: 国际会议

会议名称: 第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)

会议地点: 包头

会议语种:英文

页码: 13-16

在线出版日期: 2007-08-07（万方平台首次上网日期，不代表论文的发表时间）