Informing Ion-Exchange Membrane Design Targets for Donnan Dialysis-Mediated Lithium Brine Concentration

IF 3.8 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Kristen Abels, Victoria Yang, William A. Tarpeh
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Abstract

We assess the potential of a Donnan dialysis (DD) process for lithium brine concentration and prioritize material design opportunities from a use-informed perspective. Bench-scale batch experiments were used to validate a kinetic process model, achieving lithium concentration factors of 7.6–18.9× and recoveries of 22–74% for varying dilute lithium feed streams and operating conditions. The corresponding process model was used to assess DD performance for continuous pilot-scale concentrations of a representative lithium extraction eluate stream. Model outputs demonstrate that DD achieves comparable lithium concentration and recovery targets with similar or lower membrane area requirements compared to reverse osmosis and electrodialysis processes, respectively. A sensitivity analysis reveals the relative importance of key parameters in ion-exchange membrane design for improving DD performance (water content > charge content ≈ membrane thickness ≈ water permeability). The development of alkaline- and scaling-resistant cation exchange membranes has also been identified as a target material improvement to expand the solution compatibility limits of the DD process.

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来源期刊
Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research 工程技术-工程:化工
CiteScore
7.40
自引率
7.10%
发文量
1467
审稿时长
2.8 months
期刊介绍: ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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