Phase analysis of the solidified KF-(LiF-NaF-UF4)-ZrF4 molten electrolytes for the electrowinning of uranium
Identifikátory výsledku
Kód výsledku v 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>
Nalezeny alternativní kódy
RIV/26722445:_____/14:#0000942
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Phase analysis of the solidified KF-(LiF-NaF-UF4)-ZrF4 molten electrolytes for the electrowinning of uranium
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Phase analysis of the solidified KF-(LiF-NaF-UF4)-ZrF4 molten electrolytes for the electrowinning of uranium
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CH - Jaderná a kvantová chemie, fotochemie
OECD FORD obor
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Návaznosti výsledku
Projekt
<a href="/cs/project/ED2.1.00%2F03.0108" target="_blank" >ED2.1.00/03.0108: Udržitelná energetika</a><br>
Návaznosti
R - Projekt Ramcoveho programu EK
Ostatní
Rok uplatnění
2014
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Journal of Radioanalytical and Nuclear Chemistry
ISSN
0236-5731
e-ISSN
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Svazek periodika
302
Číslo periodika v rámci svazku
1
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
6
Strana od-do
549-554
Kód UT WoS článku
000342134800064
EID výsledku v databázi Scopus
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