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CAS OpenIR  > 中科院上海应用物理研究所2011-2017年  > 期刊论文
题名:
Pyrohydrolysis of SmF3 in moist air
作者: Peng, J; Zheng, XB; Qiu, TT; Gao, SZ; Liu, YX; Zhang, L
刊名: JOURNAL OF FLUORINE CHEMISTRY
出版日期: 2017
卷号: 193, 页码:106-112
关键词: SmF3 ; Pyrohydrolysis ; Thermogravimetry ; Reaction mechanism ; Kinetics
DOI: 10.1016/j.jfluchem.2016.11.011
文章类型: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000392044400015
ISSN号: 0022-1139
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27424
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
Peng, J,Zheng, XB,Qiu, TT,et al. Pyrohydrolysis of SmF3 in moist air[J]. JOURNAL OF FLUORINE CHEMISTRY,2017-01-01,193:106-112.
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