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A novel flow electrode capacitive deionization device with spindle-shaped desalting chamber

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Abstract

Flow-electrode capacitive deionization (FCDI) is an innovative technology in which an intermediate chamber plays an important role in the desalination process. However, relatively few studies have been conducted on the structures of these intermediate chambers. In this study, we propose a novel flow-electrode capacitive deionization device with a spindle-shaped inlet chamber (S-FCDI). The desalination rate of the S-FCDI under optimal operating conditions was 36% higher than that of the FCDI device with a conventional rectangular chamber (R-FCDI). The spindle-shaped chamber transferred 1.2 µmol more ions than the rectangular chamber, based on energy per joule. Additionally, we performed a detailed analysis of different inlet chamber shapes using computational fluid dynamics software. We concluded that S-FCDI has a relatively low flow resistance and almost no stagnation zone. This provides unique insights into the development of intermediate chambers. This study may contribute to the improvement of the desalination performance in industrial applications of FCDI.

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Acknowledgements

This work was funded by Science and Technology Project of Hebei Education Department (China) (No. QN2022038); special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control (China) (No. 22K05ESPCT).

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Authors and Affiliations

  1. College of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang, 050018, China

    Yunke Li, Junjun Ma, Chenxu Yang, Jianrui Niu, Yonghuan Bian, Ruicheng Chen, Puming Zhang, Jing Zhang & Chun Liu

  2. Pollution Prevention Biotechnology Laboratory of Hebei Province, Shijiazhuang, 050018, China

    Yunke Li, Junjun Ma, Chenxu Yang, Jianrui Niu, Yonghuan Bian, Ruicheng Chen, Puming Zhang, Jing Zhang & Chun Liu

Authors
  1. Yunke Li
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  2. Junjun Ma
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  3. Chenxu Yang
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  4. Jianrui Niu
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  5. Yonghuan Bian
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  6. Ruicheng Chen
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  7. Puming Zhang
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  8. Jing Zhang
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  9. Chun Liu
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Corresponding authors

Correspondence to Junjun Ma or Chun Liu.

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Conflict of Interests The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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Highlights

• A spindle-shaped influent chamber was designed and equipped in FCDI system.

• CFD is used to analyze the hydrodynamics of raw water in the intermediate chamber.

• The spindle-shaped chamber avoided the stagnation zone in the intermediate chamber.

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Li, Y., Ma, J., Yang, C. et al. A novel flow electrode capacitive deionization device with spindle-shaped desalting chamber. Front. Environ. Sci. Eng. 18, 40 (2024). https://doi.org/10.1007/s11783-024-1800-y

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  • DOI: https://doi.org/10.1007/s11783-024-1800-y

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