H4 Marseille Fos is an industrial project entity based in Fos‑sur‑Mer, France, in the Marseille–Fos port area. It is focused on the development of e‑fuels for aviation, with an emphasis on sustainable aviation fuel (SAF) produced from renewable hydrogen and captured carbon. Positioned within a major Mediterranean industrial and logistics hub, the initiative aims to support decarbonization of regional industry and transport while contributing to Europe’s emerging e‑fuels supply.
The project concentrates on power‑to‑liquids pathways that combine green hydrogen from electrolysis with CO₂ sourced from industrial emitters to produce drop‑in synthetic jet fuel. Its location offers access to industrial partners, energy infrastructure, and transport networks that can facilitate sourcing of inputs and distribution to airports in France and the wider region. H4 Marseille Fos operates at the intersection of hydrogen, carbon utilization, and advanced fuels, aligning with regulatory momentum for lower‑carbon aviation.