Research progress of flow-electrode capacitive deionization technology

doi:10.19965/j.cnki.iwt.2021-1237

Abstract

Abstract:

Capacitive deionization （CDI） technology，with low cost，low energy consumption and high efficiency，is an effective method to alleviate the water crisis. Flow-electrode capacitive deionization（FCDI） technology coupled with the flowable electrode and ion exchange membrane can effectively address the technical bottleneck of traditional CDI technology，including limited adsorption capacity and discontinuous operation. Over the past ten years，FCDI technology has been actively explored in terms of theoretical research，material development and engineering application，and has shown excellent application potential. Herein，this paper systematically reviewed the research progress of FCDI technology. The development history and its involved mechanism was firstly introduced. Then，the optimization method of FCDI system was analyzed in depth from several key factors，including device configuration，operation mode，material innovation and parameter influence. Furthermore，special attention has been paid to the representative applications in different fields，and the economy and practicability was evaluated. Finally，a conclusion of the review and subsequently，perspectives are given for possible research directions.

Key words: flow-electrode capacitive deionization, system optimization, desalination, resource utilization

摘要：

具有低成本、低能耗、高效率优势的电容去离子技术（CDI）是缓解水危机的有效手段。流动电极电容去离子技术（FCDI）通过将流动电极和离子交换膜耦合，可弥补传统CDI技术吸附能力有限、无法长期连续运行的技术瓶颈。经过近十年的广泛研究，FCDI技术在理论研究、材料开发和工程应用上取得了积极进展，展现出了良好的应用前景。对FCDI技术进行了系统综述，介绍了其发展历程及运行原理，并从装置构型、运行模式、材料创新和参数影响等方面深入分析了影响脱盐性能的关键因素，指出提升脱盐性能的优化策略。此外，总结了FCDI技术在水体脱盐、水污染治理及资源化、能源回收等领域的应用现状，评价了该技术的经济性和实用性，最后提出FCDI技术未来可行的发展方向。

关键词: 流动电极电容去离子, 系统优化, 脱盐, 废水资源化

CLC Number:

O646.5

Tianzhi YONG, Yang LI, Jian’gang LU, Ruoyun LIN, Junsheng WU, Xiaojun ZUO. Research progress of flow-electrode capacitive deionization technology[J]. Industrial Water Treatment, 2023, 43(1): 17-25.

雍天智, 李阳, 陆建刚, 林若昀, 吴俊升, 左晓俊. 流动电极电容去离子技术研究进展[J]. 工业水处理, 2023, 43(1): 17-25.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2021-1237

https://www.iwt.cn/EN/Y2023/V43/I1/17

Figures/Tables 5

Fig. 1 Publications of FCDI technology in web of science

Fig. 2 Development process of FCDI technology

Fig. 3 Typical FCDI device and its main structure

Fig. 4 Different operation modes of FCDI

Fig. 5 Summary of desalination performance for FCDI electrodes

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