Electrochemical direct air capture of CO2 using neutral red as reversible redox-active material
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s41467-023-35866-w.pdf
Description
Published version
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3.42 MB
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Adobe PDF
Checksum (MD5)
99eaac39186ef6466117b410f2230113
Author(s)
Seo, Hyowon
Hatton, T Alan
Date Issued
January 19, 2023
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Seo, H., Hatton, T.A. Electrochemical direct air capture of CO2 using neutral red as reversible redox-active material. Nat Commun 14, 313 (2023).
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1038/s41467-023-35866-w
