CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Influence of molten salt composition on the fluorination of UF4
Sun, LX; Niu, YS; Hu, CW; Wang, CY; Dou, Q; Li, QN
2019
Source PublicationJOURNAL OF FLUORINE CHEMISTRY
ISSN0022-1139
Volume218Issue:-Pages:99—104
Subtype期刊论文
AbstractThe fluorination of UF4 by F-2 in LiF-NaF-KF(46.5-11.5-42 mol%, FLiNaK), FLiNaK-ThF4(88.0-12.0 mol.%) and KF-ZrF4(58-42 mol%, FKZr) at 550 degrees C was investigated, and the results indicated the conversion rate of UF4 to UF6 was different in FLiNaK with the other two molten salts. Raman spectroscopy and X-ray diffraction (XRD) were used to study the influence of the fluoroacidity on the coordination structure of Zr (IV) and U(IV) in FLiNaK with various contents of ZrF4. The results indicated that the concentration of free F- decreased and the molten salt became more acidic with the increase of ZrF4 content. The main Zr(IV) complex present changed from ZrF73-, ZrF62- to ZrF5- as the U(IV) complex changed from UF84- or UF73- to UF62-. The fluorination of UF4 in FLiNaK with various fluoroacidity suggested that a higher fluoroacidity of molten salts resulted in relatively low coordination numbers of Zr-F and U-F, a higher conversion rate and average reaction rate of UF4 to UF6, and less corrosive of the structural material.
KeywordFLUOROACIDITY LANTHANIDES ACTINIDES BEHAVIOR REACTOR
DOI10.1016/j.jfluchem.2018.11.015
Indexed BySCI
Language英语
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/31673
Collection中科院上海应用物理研究所2011-2019年
Affiliation1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China;
2.Chinese Acad Sci, Ctr Excellence TMSR Energy Syst, Shanghai 201800, Peoples R China
Recommended Citation
GB/T 7714
Sun, LX,Niu, YS,Hu, CW,et al. Influence of molten salt composition on the fluorination of UF4[J]. JOURNAL OF FLUORINE CHEMISTRY,2019,218(-):99—104.
APA Sun, LX,Niu, YS,Hu, CW,Wang, CY,Dou, Q,&Li, QN.(2019).Influence of molten salt composition on the fluorination of UF4.JOURNAL OF FLUORINE CHEMISTRY,218(-),99—104.
MLA Sun, LX,et al."Influence of molten salt composition on the fluorination of UF4".JOURNAL OF FLUORINE CHEMISTRY 218.-(2019):99—104.
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