Publication
Title
How flue gas impurities affect the electrochemical reduction of CO₂ to CO and formate
Author
Abstract
The electrochemical CO2 reduction offers a promising solution to convert waste CO2 into valuable products like CO and formate. However, CO2 capture and purification remains an energy intensive process and therefore the direct usage of industrially available waste CO2 streams containing SO2, NO and O2 impurities becomes more interesting. This work demonstrates an efficient (Faradaic efficiency > 90 %) and stable performance over 20 h with 200 ppm SO2 or NO in the feed gas stream. However, the addition of 1 % O2 to the CO2 feed causes a significant drop in Faradaic efficiency to C-products due to the competitive oxygen reduction reaction. A potential mitigation strategy is to operate at higher total current density to firstly reduce most O2 and achieve sufficient product output from CO2 reduction. These results aid in understanding the impact of flue gas impurities during CO2 electrolysis which is crucial for potentially bypassing the CO2 purification step.
Language
English
Source (journal)
Applied catalysis : B : environmental. - Amsterdam
Publication
Amsterdam : 2024
ISSN
0926-3373
DOI
10.1016/J.APCATB.2023.123345
Volume/pages
341 (2024) , p. 1-10
Article Reference
123345
ISI
001102999000001
Full text (Publisher's DOI)
Full text (open access)
The author-created version that incorporates referee comments and is the accepted for publication version Available from 04.04.2024
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Intensification of CO2 capture processes (CAPTIN-2).
Unlocking the triple nitrogen bond: increasing the Faradaic efficiency with enhanced electrocatalysts achieved through a combination of high-end electrochemistry and electron microscopy.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Record
Identifier
Creation 06.10.2023
Last edited 04.12.2023
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