Cited by 30CO2 Reduction Techniques and CatalystsCatalysts for Methane ReformingCarbon dioxide utilization in catalysis

Membraneless laminar flow cell for electrocatalytic CO 2 reduction with liquid product separation

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Monroe, Morgan M, Lobaccaro, Peter, Lum, Yanwei, Ager, Joel W·2017·Journal of Physics D: Applied Physics

Abstract

The production of liquid fuel products via electrochemical reduction of CO 2 is a potential path to produce sustainable fuels. However, to be practical, a separation strategy is required to isolate the fuel-containing electrolyte produced at the cathode from the anode and also prevent the oxidation products (i.e. O 2 ) from reaching the cathode. Ion-conducting membranes have been applied in CO 2 reduction reactors to achieve this separation, but they represent an efficiency loss and can be permeable to some product species. An alternative membraneless approach is developed here to maintain product separation through the use of a laminar flow cell. Computational modelling shows that near-unity separation efficiencies are possible at current densities achievable now with metal cathodes via optimization of the spacing between the electrodes and the electrolyte flow rate. Laminar flow reactor prototypes were fabricated with a range of channel widths by 3D printing. CO 2 reduction to formic acid on Sn electrodes was used as the liquid product forming reaction, and the separation efficiency for the dissolved product was evaluated with high performance liquid chromatography. Trends in product separation efficiency with channel width and flow rate were in qualitative agreement with the model, but the separation efficiency was lower, with a maximum value of 90% achieved.

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Authors
Monroe, M. M., Lobaccaro, P., Lum, Y., & Ager, J. W.
Affiliations
Lawrence Berkeley National Laboratory (US)
Corresponding author
Ager, Joel W
Venue
Journal of Physics D: Applied Physics
Published
2017-03-16
Volume
50
Issue
15
Pages
154006
ISSN
  • 0022-3727 (ISSN-L)
  • 1361-6463
OpenAlex
W2596991660
Cited by
30
References
64
Citations by year
2026: 3 · 2025: 2 · 2024: 2 · 2023: 6 · 2022: 3 · 2021: 1 · 2020: 5 · 2019: 4 · 2018: 1 · 2017: 3
FWCI
0.95
Type
journal article
Language
en
Open access
Locations
  • Journal of Physics D Applied Physics (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • Division of Chemistry (CHE-080405)
  • National Research Foundation Singapore (Singapore Berkeley Research Institute for Sustainable Energy)
  • Basic Energy Sciences (DE-SC0004993)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
  • Physical Sciences › Chemical Engineering › Process Chemistry and Technology › Carbon dioxide utilization in catalysis
Keywords
electrochemical CO2 reduction, product separation, formic acid, TiN electrodes, liquid fuel production, electrode spacing, electrolyte flow rate, computational modelling

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