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A direct coupled electrochemical system for capture and conversion of CO2 from oceanwater

Author

Listed:
  • Ibadillah A. Digdaya

    (California Institute of Technology)

  • Ian Sullivan

    (California Institute of Technology)

  • Meng Lin

    (Southern University of Science and Technology)

  • Lihao Han

    (California Institute of Technology)

  • Wen-Hui Cheng

    (California Institute of Technology)

  • Harry A. Atwater

    (California Institute of Technology)

  • Chengxiang Xiang

    (California Institute of Technology)

Abstract

Capture and conversion of CO2 from oceanwater can lead to net-negative emissions and can provide carbon source for synthetic fuels and chemical feedstocks at the gigaton per year scale. Here, we report a direct coupled, proof-of-concept electrochemical system that uses a bipolar membrane electrodialysis (BPMED) cell and a vapor-fed CO2 reduction (CO2R) cell to capture and convert CO2 from oceanwater. The BPMED cell replaces the commonly used water-splitting reaction with one-electron, reversible redox couples at the electrodes and demonstrates the ability to capture CO2 at an electrochemical energy consumption of 155.4 kJ mol−1 or 0.98 kWh kg−1 of CO2 and a CO2 capture efficiency of 71%. The direct coupled, vapor-fed CO2R cell yields a total Faradaic efficiency of up to 95% for electrochemical CO2 reduction to CO. The proof-of-concept system provides a unique technological pathway for CO2 capture and conversion from oceanwater with only electrochemical processes.

Suggested Citation

  • Ibadillah A. Digdaya & Ian Sullivan & Meng Lin & Lihao Han & Wen-Hui Cheng & Harry A. Atwater & Chengxiang Xiang, 2020. "A direct coupled electrochemical system for capture and conversion of CO2 from oceanwater," Nature Communications, Nature, vol. 11(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18232-y
    DOI: 10.1038/s41467-020-18232-y
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    Cited by:

    1. Shijian Jin & Min Wu & Yan Jing & Roy G. Gordon & Michael J. Aziz, 2022. "Low energy carbon capture via electrochemically induced pH swing with electrochemical rebalancing," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    2. Agliuzza, Matteo & Mezza, Alessio & Sacco, Adriano, 2023. "Solar-driven integrated carbon capture and utilization: Coupling CO2 electroreduction toward CO with capture or photovoltaic systems," Applied Energy, Elsevier, vol. 334(C).

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