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Article

System-Supporting Operation of Solid-Oxide Electrolysis Stacks

1
Institute of Electrochemical Process Engineering (IEK-14), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., D-52428 Jülich, Germany
2
Research Department Future Energy and Industry Systems (SYS), Wuppertal Institut für Klima, Umwelt, Energie gGmbH, Döppersberg 19, D-42103 Wuppertal, Germany
*
Author to whom correspondence should be addressed.
Energies 2021, 14(3), 544; https://doi.org/10.3390/en14030544
Received: 23 December 2020 / Revised: 15 January 2021 / Accepted: 15 January 2021 / Published: 21 January 2021
Flexible, system-oriented operating strategies are becoming increasingly important in terms of achieving a climate-neutral energy system transformation. Solid-oxide electrolysis (SOEC) can play an important role in the production of green synthesis gas from renewable energy in the future. Therefore, it is important to investigate the extent to which SOEC can be used flexibly and which feedback effects and constraints must be taken into account. In this study, we derived a specific load profile from an energy turnaround scenario that supports the energy system. SOEC short-stacks were operated and we investigated the impact that the load profile has on electrical stack performance and stack degradation as well as the product gas composition by means of Fourier-transform infrared spectroscopy. The stacks could follow the grid-related requirement profiles of secondary control power and minute reserves very well with transition times of less than two minutes per 25% of relative power. Only short-term disturbances of the H2/CO ratio were observed during transitions due to the adjustment of feed gases. No elevated degradation effects resulting from flexible operation were apparent over 1300 h, although other causes of degradation were present. View Full-Text
Keywords: solid-oxide electrolysis; co-electrolysis; syngas production; renewable electricity; system integration; flexibility potential solid-oxide electrolysis; co-electrolysis; syngas production; renewable electricity; system integration; flexibility potential
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MDPI and ACS Style

Schäfer, D.; Janßen, T.; Fang, Q.; Merten, F.; Blum, L. System-Supporting Operation of Solid-Oxide Electrolysis Stacks. Energies 2021, 14, 544. https://doi.org/10.3390/en14030544

AMA Style

Schäfer D, Janßen T, Fang Q, Merten F, Blum L. System-Supporting Operation of Solid-Oxide Electrolysis Stacks. Energies. 2021; 14(3):544. https://doi.org/10.3390/en14030544

Chicago/Turabian Style

Schäfer, Dominik, Tomke Janßen, Qingping Fang, Frank Merten, and Ludger Blum. 2021. "System-Supporting Operation of Solid-Oxide Electrolysis Stacks" Energies 14, no. 3: 544. https://doi.org/10.3390/en14030544

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