Evaluation of Alkali Bromide Salts for Potential Pyrochemical Applications
Transient techniques were employed to study the electrochemical behavior, reduction mechanism and transport properties of REBr3 (RE - La, Nd and Gd) in pure LiBr, LiBr-KBr (eutectic) and LiBr-KBr-CsBr (eutectic) melts. Gd(III) showed a reversible single step soluble-insoluble exchange phenomenon in LiBr melt at 973K. Although La (III), Nd(III) and Gd(III) ions showed reversible behavior in eutectic LiBr-KBr melts, these ions showed a combination of temperature dependent reversible and pseudo-reversible behavior. While both La(III) and Gd(III) showed one step reduction, the reduction of Nd(III) was observed to be a two step process. La metal could be electrodeposited from the ternary electrolyte at a temperature of 673K. Various electrochemical measurements suggest that both binary and ternary bromide melts can potentially be used to electrodeposit high purity RE metals at comparatively lower operating temperatures.
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- Conference: Global 2013: International Nuclear Fuel Cycle Conference,Salt Lake City, Utah,09/29/2013,10/03/2013
- Research Org:
- Idaho National Laboratory (INL)
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- United States
- 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; molten bromide salts; pyrochemical processing; transient electrochemical techniques
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