Journal Article

FZJ-2020-04245

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Direct Solid Oxide Electrolysis of Carbon Dioxide: Analysis of Performance and Processes

Foit, S.FZJ* ; Dittrich, L.FZJ*RWTH* ; Duyster, T.FZJ* ; Vinke, I. C.FZJ* ; Eichel, R.-A.FZJ*RWTH* ; de Haart, L. G. J. (Corresponding author)FZJ*

2020
MDPI Basel

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Please use a persistent id in citations: http://hdl.handle.net/2128/26319  doi:10.3390/pr8111390

Abstract: Chemical industries rely heavily on fossil resources for the production of carbon-based chemicals. A possible transformation towards sustainability is the usage of carbon dioxide as a source of carbon. Carbon dioxide is activated for follow-up reactions by its conversion to carbon monoxide. This can be accomplished by electrochemical reduction in solid oxide cells. In this work, we investigate the process performance of the direct high-temperature CO$_2$ electrolysis by current-voltage characteristics (iV) and Electrochemical Impedance Spectroscopy (EIS) experiments. Variations of the operation parameters temperature, load, fuel utilization, feed gas ratio and flow rate show the versatility of the procedure with maintaining high current densities of 0.75 up to 1.5 A·cm$^{−2}$, therefore resulting in high conversion rates. The potential of the high-temperature carbon dioxide electrolysis as a suitable enabler for the activation of CO$_2$ as a chemical feedstock is therefore appointed and shown.

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Contributing Institute(s):

1. Grundlagen der Elektrochemie (IEK-9)

Research Program(s):

1. 135 - Fuel Cells (POF3-135) (POF3-135)

Appears in the scientific report 2020

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