This title appears in the Scientific Report :
2019
Please use the identifier:
http://dx.doi.org/10.1149/2.0581913jes in citations.
Please use the identifier: http://hdl.handle.net/2128/22711 in citations.
High-Temperature Co-Electrolysis: A Versatile Method to Sustainably Produce Tailored Syngas Compositions
High-Temperature Co-Electrolysis: A Versatile Method to Sustainably Produce Tailored Syngas Compositions
High-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...
Saved in:
Personal Name(s): | Dittrich, Lucy (Corresponding author) |
---|---|
Nohl, Markus / Jaekel, Esther E. / Foit, Severin / de Haart, L. G. J. (Bert) / Eichel, Rüdiger-A. | |
Contributing Institute: |
Grundlagen der Elektrochemie; IEK-9 |
Published in: | Journal of the Electrochemical Society, 166 (2019) 13, S. F971 - F975 |
Imprint: |
Pennington, NJ
Electrochemical Soc.
2019
|
DOI: |
10.1149/2.0581913jes |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Fuel Cells |
Link: |
Get full text Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/22711 in citations.
High-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. |