Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (9): 125 doi: 10.1007/s41365-018-0465-2


Influence of α-Al2O3 and AlF3 on pyrohydrolysis of Li3AlF6

Jia Peng 1,2,3, Xiao-Bei Zheng 1,3, Yu-Xia Liu 1,3, Lan Zhang 1,3   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
    3 CAS Innovative Academy in TMSR Energy System, Shanghai 201800, China
  • Contact: Yu-Xia Liu
  • Supported by:

    This work was supported by the ‘‘Strategic Priority Research Program’’ of the Chinese Academy of Sciences (No. XDA02030000).

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Jia Peng, Xiao-Bei Zheng, Yu-Xia Liu, Lan Zhang. Influence of α-Al2O3 and AlF3 on pyrohydrolysis of Li3AlF6.Nuclear Science and Techniques, 2018, 29(9): 125     doi: 10.1007/s41365-018-0465-2


In this study, Li3AlF6 was employed to simulate the molten salt LiF–BeF2 to explore its pyrohydrolysis behavior and that of its components, i.e., LiF and AlF3, respectively. The influence of the accelerators a-Al2O3 and AlF3 on the pyrohydrolysis of LiF and Li3AlF6 was investigated. Finally, the solid pyrohydrolytic products were characterized by means of X-ray diffraction, and the corresponding reaction mechanisms were proposed. These experimental results indicated that AlF3 was completely hydrolyzed to the corresponding oxide α-Al2O3 at 650 °C in 1 h, whereas the complete hydrolysis of LiF and Li3AlF6 required the assistance of either α-Al2O3 or AlF3 under the same conditions. The influence of the accelerator a-Al2O3 and AlF3 on the pyrohydrolytic behavior of Li3AlF6 provides references for future research studies on the pyrohydrolysis of LiF–BeF2 and multi-component molten salts.

Key words: Pyrohydrolysis, Accelerator, Li3AlF6 molten salt, Reaction mechanism