Preparation of LiOH through BMED process from lithium-containing solutions: Effects of coexisting ions and competition between Na+ and Li+
Preparation of LiOH through BMED process from lithium-containing solutions: Effects of coexisting ions and competition between Na+ and Li+
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通过 BMED 工艺从含锂溶液制备 LiOH：共存离子的影响以及 Na 和 Li 之间的竞争
DOI：
10.1016/j.desal.2021.115126
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发表时间：
2021-09
期刊：
影响因子：
9.9
通讯作者：
Yang Hongjun
中科院分区：
文献类型：
--
作者：
Zhao Youjing;Xiang Xu;Wang Min;Wang Huaiyou;Li Yan;Li Jinli;Yang Hongjun
Bipolar membrane electrodialysis (BMED) is a promising method to produce LiOH from lithium containing solutions. However, the coexisting ions will significantly affect the current efficiency of preparing LiOH. Herein, the influence of the ion's property on the mass transfer behavior of the BMED was investigated, establishing the relations between hydration number and ion's migration as well as water osmosis. Effects of coexisting ions on the lithium migration and current efficiency were studied. The results show that the competition from Na+and K+reduced the migration rate of Li+and increased the energy consumption of producing LiOH, and the coexisting K+had greater impact compared with Na+. The coexisting SO42−in feed solution generated severer lithium leakage into the acid compartment than Cl−did. In addition, influences of the Na/Li molar ratio in feed solution, current density, and characteristics of cation exchange membrane (CEM) on competitions between Na+and Li+were discussed. With increasing the Na/Li molar ratio, lithium concentration in base solution decreased, while the energy consumption increased, owing to the dominant role of Na+in competitive migration and backward diffusion. Larger ion exchange capacity and lower resistivity of CEMs were beneficial for avoiding negative-transfer and enhancing current efficiency.
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影响因子：
9.9
作者：
Zhao Youjing;Wang Huaiyou;Li Yan;Wang Min;Xiang Xu
通讯作者：
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DOI：
--
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