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Bench-scale electrochemical system for generation of CO and syn-gas

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Abstract

A flow cell based, bench-scale electrochemical system for generation of synthesis-gas (syn-gas) is reported. Sensitivity to operating conditions such as CO2 flow, current density, and elevated temperature are described. By increasing the temperature of the cell the kinetic overpotential for the reduction of CO2 was lowered with the cathode voltage at 70 mA cm−2 decreased by 0.32 V and the overall cell voltage dropping by 1.57 V. This equates to an 18% increase in cell efficiency. By closely monitoring the products it was found that at room temperature and 70 °C the primary products are CO and H2. By controlling the current density and the flow of CO2 it was possible to control the H2:CO product ratio between 1:4 and 9:1. The reproducibility of performing experiments at elevated temperature and the ability to generate syn-gas for extended periods of time is also discussed.

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Acknowledgments

Work supported through the INL Laboratory Directed Research & Development (LDRD) Program under DOE Idaho Operations Office Contract DE-AC07-05ID14517.

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Authors and Affiliations

  1. Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID, 83415, USA

    Eric J. Dufek, Tedd E. Lister & Michael E. McIlwain

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  1. Eric J. Dufek
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  2. Tedd E. Lister
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  3. Michael E. McIlwain
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Correspondence to Tedd E. Lister.

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Dufek, E.J., Lister, T.E. & McIlwain, M.E. Bench-scale electrochemical system for generation of CO and syn-gas. J Appl Electrochem 41, 623–631 (2011). https://doi.org/10.1007/s10800-011-0271-6

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  • DOI: https://doi.org/10.1007/s10800-011-0271-6

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