Phase analysis of the solidified KF-(LiF-NaF-UF4)-ZrF4 molten electrolytes for the electrowinning of uranium

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46356088%3A_____%2F14%3A%230001553" target="_blank" >RIV/46356088:_____/14:#0001553 - isvavai.cz</a>
Alternative codes found
RIV/26722445:_____/14:#0000942
Result on the web
<a href="http://dx.doi.org/10.1007/s10967-014-3219-6" target="_blank" >http://dx.doi.org/10.1007/s10967-014-3219-6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10967-014-3219-6" target="_blank" >10.1007/s10967-014-3219-6</a>

Result language
angličtina
Original language name
Phase analysis of the solidified KF-(LiF-NaF-UF4)-ZrF4 molten electrolytes for the electrowinning of uranium
Original language description
The X-ray diffraction (XRD) phase analysis of different solidified uranium-based fluoride systems ((LiF-NaF)(eut)-UF4; (KF-LiF-NaF)(eut)-UF4; (LiF-NaF)(eut)-UF4-ZrF4 and (KF-LiF-NaF)(eut)-UF4-ZrF4) were examined in order to provide the basis for pyro-electrochemical extraction of uranium in molten fluorides. Several uranium-based species (Na2UF6, Na3UF7, K2UF6, K3UF7, UO2, K3UO2F5) were identified in the solidified melts. The role of oxygen in argon atmosphere was found to be critical in the formation of uranium species during the melting and solidification. In order to reduce the accumulated level of free oxygen traces in our experiments, zirconium (in the form of ZrF4) was used inside the melt as an oxygen buffer. It was found that ZrF4 can really stabilize the uranium species by complexation and protects them against the oxygenation. The results of this work highlight the importance of oxygen removal for obtaining pure deposit in the electrorefinning of uranium.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CH - Nuclear and quantum chemistry, photo chemistry
OECD FORD branch
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Project
<a href="/en/project/ED2.1.00%2F03.0108" target="_blank" >ED2.1.00/03.0108: Sustainable Energy</a><br>
Continuities
R - Projekt Ramcoveho programu EK

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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