Y(III) Ion Migration in AlF3–(Li,Na)F–Y2O3 Molten Salt
Y(III) Ion Migration in AlF3–(Li,Na)F–Y2O3 Molten Salt
复制标题
AlF3−(Li,Na)F−Y2O3 熔盐中 Y(III) 离子迁移
DOI：
10.3390/app12042200
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发表时间：
2022-02
期刊：
影响因子：
--
通讯作者：
Yunlong Chang
中科院分区：
文献类型：
--
作者：
Tingting Hao;Xu Wang;Yuchun Zhai;Yunlong Chang
本研究采用Hittorf方法设计了包含阳极室、阴极室和中极室的三个槽，并利用COMSOL系统建立了流场和电场的双向耦合模型。对所建模型中的电场分布进行了仿真，验证了模型的可靠性、边界条件和相关参数。利用三腔槽研究了Y（III）离子在AlF3 - (Li,Na)F体系中的迁移数变化规律和迁移机理。随着温度从900℃升高到1000℃，AlF3 - (Li,Na) F-Y2O3熔盐中Y（III）离子的迁移数从0.70线性增加到0.80；当（Li,Na）F/AlF3摩尔比在2.0 ~ 2.5之间时，Y（III）离子的迁移数相对恒定，其平均值约为0.75。同时，当（Li,Na）F/AlF3摩尔比大于2.5时，Y（III）离子的迁移数从0.75线性降低到0.45。最后，在电流密度1.0 ~ 2.0 A/cm2范围内，Y（III）离子的迁移数从0.65增加到0.85，几乎呈线性增加。
In this study, three slots containing an anode chamber, a cathode chamber, and a middle pole chamber were designed by applying the Hittorf method, and a two-way coupling model of the flow field and electric field was established using the COMSOL system. The electric field distribution in the constructed model was simulated, and the model reliability, boundary conditions, and related parameters were verified. A three-chamber tank was utilized to investigate the migration numbers change rule and migration mechanism of Y(III) ions in the AlF3–(Li,Na)F system. The migration number of Y(III) ions in the AlF3–(Li,Na)F–Y2O3 molten salt linearly increased from 0.70 to 0.80 with an increase in temperature from 900 to 1000 °C. When the (Li,Na)F/AlF3 molar ratio was between 2.0 and 2.5, the migration number of Y(III) ions was relatively constant, and its average value was approximately 0.75. Meanwhile, at (Li,Na)F/AlF3 molar ratios higher than 2.5, the migration number of Y(III) ions linearly decreased from 0.75 to 0.45. Finally, in the current density range of 1.0–2.0 A/cm2, the migration number of Y(III) ions increased almost linearly from 0.65 to 0.85.
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