Influence of molten salt composition on the fluorination of UF4

doi:10.1016/j.jfluchem.2018.11.015

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Influence of molten salt composition on the fluorination of UF4
	Sun, LX ; Niu, YS ; Hu, CW ; Wang, CY ; Dou, Q ; Li, QN
刊名	JOURNAL OF FLUORINE CHEMISTRY
	2019
卷号	218 期号:-页码:99—104
关键词	FLUOROACIDITY LANTHANIDES ACTINIDES BEHAVIOR REACTOR
ISSN号	0022-1139
DOI	10.1016/j.jfluchem.2018.11.015
文献子类	期刊论文
英文摘要	The 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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/31673]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Chinese Acad Sci, Ctr Excellence TMSR Energy Syst, Shanghai 201800, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China;
推荐引用方式 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.