Pyrohydrolysis of SmF3 in moist air

doi:10.1016/j.jfluchem.2016.11.011

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

	Pyrohydrolysis of SmF3 in moist air
	Peng, J; Zheng, XB; Qiu, TT; Gao, SZ; Liu, YX; Zhang, L
刊名	JOURNAL OF FLUORINE CHEMISTRY
	2017
卷号	193 页码:106-112
关键词	Smf3 Pyrohydrolysis Thermogravimetry Reaction Mechanism Kinetics
ISSN号	0022-1139
DOI	10.1016/j.jfluchem.2016.11.011
文献子类	期刊论文
英文摘要	In order to prove the feasibility of pyrohydrolysis method of fluorides in TMSR spent fuel reprocessing, pyrohydrolysis behavior and reaction mechanism of neutron poison represented by SmF3 in moist air, have been studied by means of thermogravimetric analysis (TG). Then, reaction products in solid state Were characterized by means of XRD and SEM. The results indicated that SmF3 began to hydrolyze in 773 K. Two definite breaks on TG curves were correlated to the conversions of SmF3 into SmOF and SmOF into Sm2O3, respectively. Through the simulation calculation, we found that the two stages of the reaction can both meet the second-order reaction kinetics, and their corresponding activation energies are 60.2 and 31.2 kJ/mol, respectively. From the results of dynamics simulation, the rate equation obeyed the phase boundary rate law, which was expressed by [1 - (1 - x)(1/3)] = kt. Further studies indicated that the rate-determining step was the surface reaction control, and the shrinking core model was applied to describe the mechanism. These results showed that pyrohydrolysis method of fluorides could be used for fuel reprocessing due to its unique reaction mechanism. (C) 2016 Elsevier B.V. All rights reserved.
语种	英语
WOS记录号	WOS:000392044400015
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/27424]
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
推荐引用方式 GB/T 7714	Peng, J,Zheng, XB,Qiu, TT,et al. Pyrohydrolysis of SmF3 in moist air[J]. JOURNAL OF FLUORINE CHEMISTRY,2017,193:106-112.
APA	Peng, J,Zheng, XB,Qiu, TT,Gao, SZ,Liu, YX,&Zhang, L.(2017).Pyrohydrolysis of SmF3 in moist air.JOURNAL OF FLUORINE CHEMISTRY,193,106-112.
MLA	Peng, J,et al."Pyrohydrolysis of SmF3 in moist air".JOURNAL OF FLUORINE CHEMISTRY 193(2017):106-112.