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Electrochemical direct air capture of CO2 using neutral red as reversible redox-active material

Author

Listed:
  • Hyowon Seo

    (Massachusetts Institute of Technology)

  • T. Alan Hatton

    (Massachusetts Institute of Technology)

Abstract

Direct air capture of carbon dioxide is a viable option for the mitigation of CO2 emissions and their impact on global climate change. Conventional processes for carbon capture from ambient air require 230 to 800 kJ thermal per mole of CO2, which accounts for most of the total cost of capture. Here, we demonstrate electrochemical direct air capture using neutral red as a redox-active material in an aqueous solution enabled by the inclusion of nicotinamide as a hydrotropic solubilizing agent. The electrochemical system demonstrates a high electron utilization of 0.71 in a continuous flow cell with an estimated minimum work of 35 kJe per mole of CO2 from 15% CO2. Further exploration using ambient air (410 ppm CO2 in the presence of 20% oxygen) as a feed gas shows electron utilization of 0.38 in a continuous flow cell to provide an estimated minimum work of 65 kJe per mole of CO2.

Suggested Citation

  • Hyowon Seo & T. Alan Hatton, 2023. "Electrochemical direct air capture of CO2 using neutral red as reversible redox-active material," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-35866-w
    DOI: 10.1038/s41467-023-35866-w
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    References listed on IDEAS

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    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. Yayuan Liu & Hong-Zhou Ye & Kyle M. Diederichsen & Troy Van Voorhis & T. Alan Hatton, 2020. "Electrochemically mediated carbon dioxide separation with quinone chemistry in salt-concentrated aqueous media," Nature Communications, Nature, vol. 11(1), pages 1-11, December.
    3. Xie, Heping & Wu, Yifan & Liu, Tao & Wang, Fuhuan & Chen, Bin & Liang, Bin, 2020. "Low-energy-consumption electrochemical CO2 capture driven by biomimetic phenazine derivatives redox medium," Applied Energy, Elsevier, vol. 259(C).
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