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In the context of power-to-liquid (PtL) processes for the production of synthetic fuels the generation of syngas is a key step. Co-electrolysis in high-temperature electrolyzers is a promising option for single-step generation of syngas from H2O and CO2. In this chapter an overview on co-electrolysis is given, covering the thermodynamic and technological basics as well as the applied approach for scale-up. Experimental results from a small-scale demonstration unit allow for an assessment of the importance of heat integration within the system. The advantage of increased PtL energetic efficiency by thermal coupling of co-electrolysis and synthesis is discussed, highlighting the future potential of co-electrolysis in the context of synthetic fuel production.

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Co-electrolysis

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  • 发表日期：

    2025年

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  • Erik Reichelt,
  • Gregor Herz,
  • Matthias Jahn

摘要

In the context of power-to-liquid (PtL) processes for the production of synthetic fuels the generation of syngas is a key step. Co-electrolysis in high-temperature electrolyzers is a promising option for single-step generation of syngas from H2O and CO2. In this chapter an overview on co-electrolysis is given, covering the thermodynamic and technological basics as well as the applied approach for scale-up. Experimental results from a small-scale demonstration unit allow for an assessment of the importance of heat integration within the system. The advantage of increased PtL energetic efficiency by thermal coupling of co-electrolysis and synthesis is discussed, highlighting the future potential of co-electrolysis in the context of synthetic fuel production.