Operating maps of high temperature H2O electrolysis and H2O+CO2 co-electrolysis in solid oxide cells
| Autor: | Laurent Dessemond, Gérard Delette, F. Usseglio-Viretta, J. Aicart, Jérôme Laurencin, M. Petitjean |
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| Rok vydání: | 2016 |
| Předmět: |
Electrolysis
Renewable Energy Sustainability and the Environment Chemistry 020209 energy High-pressure electrolysis Energy Engineering and Power Technology 02 engineering and technology Condensed Matter Physics Electrochemistry Cathode law.invention Fuel Technology Chemical engineering High-temperature electrolysis law 0202 electrical engineering electronic engineering information engineering Polarization (electrochemistry) Polymer electrolyte membrane electrolysis Syngas |
| Zdroj: | International Journal of Hydrogen Energy. 41:17233-17246 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2016.07.269 |
| Popis: | This work aims at investigating through a modeling approach the difference in thermal and electrochemical responses between high temperature H 2 O electrolysis and H 2 O+CO 2 co-electrolysis in solid oxide cells. The study has been conducted by considering a typical planar stack configuration with cathode supported cells. The influence of the local temperature on the polarization curve is discussed. Operating maps are simulated for both electrolysis modes depending on cell voltage and inlet gas flow rate, covering a complete range of gas conversion rates. The optimum domains of operating conditions combining high performances and reasonable temperature elevations are identified. In overall, higher performances are found in steam electrolysis. Indeed, the co-electrolysis process is found to be strongly limited by mass transport through the thick cathode. However, co-electrolysis exhibits an easier thermal management. Finally, the composition of the syngas produced by co-electrolysis is found to be highly flexible through adjustments of the operating parameters. |
| Databáze: | OpenAIRE |
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