Assessment of the Thermochemical Properties of Actinides in Molten Chlorides
Assessment of the Thermochemical Properties of Actinides in Molten Chlorides
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DOI：
10.1515/zna-2008-1-218
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发表时间：
2008-02
期刊：
影响因子：
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通讯作者：
P. Masset;C. Apostolidis;R. Malmbeck;J. Rebizant;J. Serp;J. Glatz
中科院分区：
文献类型：
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作者：
P. Masset;C. Apostolidis;R. Malmbeck;J. Rebizant;J. Serp;J. Glatz
用瞬态电化学技术研究了400 - 550 °C下锕系元素U、Pu、Np和Am的氯化物在LiCl-KCl共晶中的电化学性质。测定了阳离子在惰性钨电极上的扩散系数和氧化还原体系的表观标准电位。从电化学测量中导出了AnCl 3稀溶液的吉布斯自由能和活度系数。此外，还研究了锕系元素在铝电极上的电化学行为。它们形成了AnAl 4合金，其形成电位允许锕系元素的定量回收以及它们与裂变产物，特别是镧系元素的分离。此外，AnAl 4合金的热化学性能通过电化学测量确定。
The electrochemical properties of the chlorides of the actinides U, Pu, Np and Am (AnCl3) were investigated by transient electrochemical techniques in the LiCl-KCl eutectic at 400 - 550 °C. The diffusion coefficients of the cations and the apparent standard potentials of the redox systems on an inert W electrode were measured. The Gibbs energy of dilute solutions of AnCl3 as well as the activity coefficients were derived from electrochemical measurements. In addition, the electrochemical behaviour of the actinides on an Al electrode was investigated. They formed AnAl4 alloys, the formation potentials of which allowed a quantitative recovery of the actinides and their separation from fission products and especially from lanthanides. In addition, the thermochemical properties of the AnAl4 alloys were determined by electrochemical measurements.