Multiphysics and multizone modeling of electrically switched ion exchange with self-driven adsorption for Li+ extraction

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2025-02-11 DOI:10.1002/aic.18778

Xuefeng Zhang, Tong Pei, Fengfeng Gao, Xiao Du, Zhonglin Zhang, Lei Xing, Zhong Liu, Jun Li, Xiaogang Hao

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引用次数: 0

Abstract

Electrically switched ion exchange (ESIX) is a promising approach for extracting Li⁺ from brines with high Mg/Li ratios. However, the effect of operating conditions and film electrode parameters on electrochemical performance remains unclear. Herein, a dynamic multiphysics and multizone model was developed to describe the ESIX process with self-driven adsorption, using an LMO/PPy electrode pair for ion and charge transport. The results revealed that a flow velocity of 0.0125 m/s and a PPy/LMO mass ratio of 15:1 can effectively reduce Li⁺ concentration polarization and activate electroactive sites, respectively. Additionally, the high solid volume fraction of LMO particles increases the concentration difference of electroactive sites, thereby enhancing Li⁺ extraction performance. Meanwhile, low currents (≤25 mA/g) narrow the gap between the interfacial exchange current and the applied current, hence improving Li⁺ extraction efficiency. This model serves as an efficient in-silico tool for designing and optimizing electrochemical Li⁺ extraction processes.

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.