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000864472 1001_ $$0P:(DE-Juel1)171748$$aDittrich, Lucy$$b0$$eCorresponding author
000864472 245__ $$aHigh-Temperature Co-Electrolysis: A Versatile Method to Sustainably Produce Tailored Syngas Compositions
000864472 260__ $$aPennington, NJ$$bElectrochemical Soc.$$c2019
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000864472 520__ $$aHigh-temperature co-electrolysis of carbon dioxide and steam is a promising method to produce ‘white’ syngas by making use of renewable energy and carbon dioxide as sustainable feedstock. The technological key advantage is the possibility to tailor syngas compositions over a broad range. This paper presents a systematic investigation of the syngas tailoring process by establishing relationships between feed gas compositions and flow rates to the syngas ratio. A linear dependence between the H2O:CO2 ratio in the feed gas and the H2:CO ratio in the output gas was observed. Furthermore, the syngas ratio remains mostly invariant upon variations in electrochemical potential and fluctuating gas utilizations/flow rates during operation of a co-electrolysis cell. Most importantly, the co-electrolysis performance was demonstrated to operate at high current densities of up to 3.2 A·cm−2 over a broad range of feed gas compositions with faradaic efficiencies of nearly 100%. The possibility to operate co-electrolysis under transient load conditions renders this method particularly suitable in future scenarios of intermittent availability of renewables. The results described here illustrate the versatility of co-electrolysis, which can produce all relevant syngas compositions in a single-step process at constantly high performance.
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000864472 7001_ $$0P:(DE-Juel1)177600$$aNohl, Markus$$b1
000864472 7001_ $$0P:(DE-Juel1)178739$$aJaekel, Esther E.$$b2
000864472 7001_ $$0P:(DE-Juel1)166524$$aFoit, Severin$$b3
000864472 7001_ $$0P:(DE-Juel1)129952$$ade Haart, L. G. J.$$b4
000864472 7001_ $$0P:(DE-Juel1)156123$$aEichel, Rüdiger-A.$$b5
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