SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 45 ›› Issue (5): 258-267.DOI: 10.1016/j.cjche.2021.07.003

• • 上一篇    下一篇

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

Minxia Liu, Dang Wu, Dongling Qin, Gang Yang   

  1. College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
  • 收稿日期:2021-02-22 修回日期:2021-06-28 出版日期:2022-05-28 发布日期:2022-06-22
  • 通讯作者: Gang Yang,E-mail:yanggang@njtech.edu.cn
  • 基金资助:
    This work was financially supported by the Prospective Joint Research Project of Industry, University and Research in Jiangsu Province (BY2016005-11), and National Science and Technology Support Plan (No. 2013BAE111B03).

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

Minxia Liu, Dang Wu, Dongling Qin, Gang Yang   

  1. College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
  • Received:2021-02-22 Revised:2021-06-28 Online:2022-05-28 Published:2022-06-22
  • Contact: Gang Yang,E-mail:yanggang@njtech.edu.cn
  • Supported by:
    This work was financially supported by the Prospective Joint Research Project of Industry, University and Research in Jiangsu Province (BY2016005-11), and National Science and Technology Support Plan (No. 2013BAE111B03).

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

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