The latest paper explores how coupling the high temperature electrolyzer with eFuel processes can contribute to aviation decarbonization in a cost efficient way, a study led hand-in-hand with Airbus and Hinicio.

The urgency

Sustainable aviation fuel (SAF) is essential to decarbonize aviation, but bioSAF alone cannot meet long-term demand. By 2035, eSAF will become indispensable as regulation pushes for synthetic eSAF mandates, and bio-feedstocks reach saturation. Cost remains the primary barrier for eSAF deployment, with current prices far from the fossil-based and even advanced biofuel equivalent. Electrolyser electricity consumption and eFuel plant hydrogen efficiency are key cost drivers in eSAF production. New technology bricks capable of reducing costs must be integrated now to impact projects reaching FID by 2035.

The opportunity

Solid oxide electrolysis (SOEC) offers a direct path to lower eSAF costs through more efficient hydrogen and syngas production, significantly reducing electricity needs — provided CAPEX remains within a competitive range. SOEC enables thermal integration with downstream synthesis units, improving overall energy performance. The analysis shows by 2035 SOEC can lower the levelized cost of eSAF. Early movers can future-proof their eSAF projects by including SOEC as a strategic option in their design, while securing a long-term competitive edge and shaping supportive policies to their advantage.