In this study, Li_3AlF_6 was employed to simulate the molten salt LiF–BeF_2 to explore its pyrohydrolysis behavior and that of its components, i.e., LiF and AlF_3,respectively. The influence of the accelerators α-Al...In this study, Li_3AlF_6 was employed to simulate the molten salt LiF–BeF_2 to explore its pyrohydrolysis behavior and that of its components, i.e., LiF and AlF_3,respectively. The influence of the accelerators α-Al_2O_3 and AlF_3 on the pyrohydrolysis of LiF and Li_3AlF_6 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 AlF_3 was completely hydrolyzed to the corresponding oxide α-Al_2O_3 at 650 ℃ in 1 h, whereas the complete hydrolysis of LiF and Li_3AlF_6 required the assistance of either α-Al_2O_3 or AlF_3 under the same conditions. The influence of the accelerator α-Al_2O_3 and AlF_3 on the pyrohydrolytic behavior of Li_3AlF_6 provides references for future research studies on the pyrohydrolysis of LiF–BeF_2 and multi-component molten salts.展开更多
基金supported by the‘‘Strategic Priority Research Program’’of the Chinese Academy of Sciences(No.XDA02030000)
文摘In this study, Li_3AlF_6 was employed to simulate the molten salt LiF–BeF_2 to explore its pyrohydrolysis behavior and that of its components, i.e., LiF and AlF_3,respectively. The influence of the accelerators α-Al_2O_3 and AlF_3 on the pyrohydrolysis of LiF and Li_3AlF_6 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 AlF_3 was completely hydrolyzed to the corresponding oxide α-Al_2O_3 at 650 ℃ in 1 h, whereas the complete hydrolysis of LiF and Li_3AlF_6 required the assistance of either α-Al_2O_3 or AlF_3 under the same conditions. The influence of the accelerator α-Al_2O_3 and AlF_3 on the pyrohydrolytic behavior of Li_3AlF_6 provides references for future research studies on the pyrohydrolysis of LiF–BeF_2 and multi-component molten salts.
