Rely has been selected by H4 Marseille Fos to conduct early engineering studies for a large-scale sustainable aviation fuel (e-SAF) project in Fos-sur-Mer, France. The studies will define the plant’s design and support permitting for a major European hub for hydrogen and e-SAF production.

The facility will produce around 75,000 tonnes of e-SAF annually from captured CO₂ and green hydrogen generated via 300 MW of water electrolysis, with operations targeted for 2030. The project includes a methanol-to-jet pathway, converting renewable methanol into drop-in jet fuel for aviation.

Rely will apply its expertise in electrolysis and gas-to-liquid integration, while incorporating technology providers for CO₂-to-methanol and methanol-to-jet conversion. The studies will prepare the ground for a potential FEED phase, accelerating project readiness and investment decisions.

Led by H4 Marseille Fos, a joint venture between H2V and Hy2gen, the project is strategically located to supply Southern and Eastern France and the Mediterranean region, supporting the creation of a competitive and sustainable aviation fuel supply chain.