Spray-drying assisted layer-structured H2TiO3 ion sieve synthesis and lithium adsorption performance

doi:10.1016/j.cjche.2021.07.003

Abstract

Abstract: A spray-drying assisted solid-state method to prepare spherical layer-structured H₂TiO₃ ion sieve (LSTIS) particles is reported herein. The effects of synthesis parameters (calcination temperature, calcination time, and the lithium-titanium molar ratio) on adsorption–desorption performance (the delithiation ratio, titanium dissolution loss, and the adsorption capacity) were investigated. The as-prepared LSTIS exhibited an equilibrium adsorption capacity of 30.08 mg·g^-1 (average of 25.85 mg·g^-1 over 5 cycles) and ultra-low titanium dissolution loss of less than 0.12% (average of 0.086% over 5 cycles). The LSTIS showed excellent selectivity toward Li⁺ in Na⁺, K⁺, Mg²⁺, and Ca²⁺ coexisting saline solutions where its adsorption capacity reached 27.45 mg·g^-1 and the separation factors of Li⁺ over the coexisting cations exceeded 100. The data suggests that the LSTIS is promising to competitively enrich Li⁺ from saline solutions.

Key words: Spray-drying, Ion sieve, Adsorption, Lithium, Dissolution loss

摘要： A spray-drying assisted solid-state method to prepare spherical layer-structured H₂TiO₃ ion sieve (LSTIS) particles is reported herein. The effects of synthesis parameters (calcination temperature, calcination time, and the lithium-titanium molar ratio) on adsorption–desorption performance (the delithiation ratio, titanium dissolution loss, and the adsorption capacity) were investigated. The as-prepared LSTIS exhibited an equilibrium adsorption capacity of 30.08 mg·g^-1 (average of 25.85 mg·g^-1 over 5 cycles) and ultra-low titanium dissolution loss of less than 0.12% (average of 0.086% over 5 cycles). The LSTIS showed excellent selectivity toward Li⁺ in Na⁺, K⁺, Mg²⁺, and Ca²⁺ coexisting saline solutions where its adsorption capacity reached 27.45 mg·g^-1 and the separation factors of Li⁺ over the coexisting cations exceeded 100. The data suggests that the LSTIS is promising to competitively enrich Li⁺ from saline solutions.

关键词: Spray-drying, Ion sieve, Adsorption, Lithium, Dissolution loss

Minxia Liu, Dang Wu, Dongling Qin, Gang Yang. Spray-drying assisted layer-structured H₂TiO₃ ion sieve synthesis and lithium adsorption performance[J]. Chinese Journal of Chemical Engineering, 2022, 45(5): 258-267.

Minxia Liu, Dang Wu, Dongling Qin, Gang Yang. Spray-drying assisted layer-structured H₂TiO₃ ion sieve synthesis and lithium adsorption performance[J]. 中国化学工程学报, 2022, 45(5): 258-267.

References

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Spray-drying assisted layer-structured H₂TiO₃ ion sieve synthesis and lithium adsorption performance

Spray-drying assisted layer-structured H₂TiO₃ ion sieve synthesis and lithium adsorption performance

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