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System-Supporting Operation of Solid-Oxide Electrolysis Stacks

Author

Listed:
  • Dominik Schäfer

    (Institute of Electrochemical Process Engineering (IEK-14), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., D-52428 Jülich, Germany)

  • Tomke Janßen

    (Research Department Future Energy and Industry Systems (SYS), Wuppertal Institut für Klima, Umwelt, Energie gGmbH, Döppersberg 19, D-42103 Wuppertal, Germany)

  • Qingping Fang

    (Institute of Electrochemical Process Engineering (IEK-14), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., D-52428 Jülich, Germany)

  • Frank Merten

    (Research Department Future Energy and Industry Systems (SYS), Wuppertal Institut für Klima, Umwelt, Energie gGmbH, Döppersberg 19, D-42103 Wuppertal, Germany)

  • Ludger Blum

    (Institute of Electrochemical Process Engineering (IEK-14), Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., D-52428 Jülich, Germany)

Abstract

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 H 2 /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.

Suggested Citation

  • Dominik Schäfer & Tomke Janßen & Qingping Fang & Frank Merten & Ludger Blum, 2021. "System-Supporting Operation of Solid-Oxide Electrolysis Stacks," Energies, MDPI, vol. 14(3), pages 1-18, January.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:3:p:544-:d:484686
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    References listed on IDEAS

    as
    1. Herz, Gregor & Reichelt, Erik & Jahn, Matthias, 2018. "Techno-economic analysis of a co-electrolysis-based synthesis process for the production of hydrocarbons," Applied Energy, Elsevier, vol. 215(C), pages 309-320.
    2. Luo, Yu & Wu, Xiao-yu & Shi, Yixiang & Ghoniem, Ahmed F. & Cai, Ningsheng, 2018. "Exergy analysis of an integrated solid oxide electrolysis cell-methanation reactor for renewable energy storage," Applied Energy, Elsevier, vol. 215(C), pages 371-383.
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