System Design Considerations for Enhancing Electroproduction of Formate from Simulated Flue Gas

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The direct utilization of CO2 from flue gas bypasses the need for costly carbon capture and purification processes and thus presents a potentially more economical approach to create chemical feedstocks and fuels. In this work, essential system design parameters required for a CO2 electrolyzer to perform efficient electroproduction of formate from a simulated flue gas feed at industrially relevant activities have been identified. In addition to the use of effective catalysts and gas-diffusion electrodes, we demonstrate that the efficiency of formate production in a dilute CO2 environment is highly sensitive to the feed flow rate, which is directly related to the local CO2 concentration. If the flow condition is not optimal under dilute CO2 conditions, the carbonation reaction dominates and limits CO2 availability for formate production. Ultimately, we have established basic system design guidelines to overcome CO2 deficiency in a flue gas conversion electrolyzer without the need of a costly high-pressure system.
Publisher
AMER CHEMICAL SOC
Issue Date
2021-02
Language
English
Article Type
Article
Citation

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.9, no.5, pp.2348 - 2357

ISSN
2168-0485
DOI
10.1021/acssuschemeng.0c08632
URI
http://hdl.handle.net/10203/281651
Appears in Collection
MS-Journal Papers(저널논문)
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