ENGIE launches mosaHYc cross-border hydrogen conversion project

In Germany, ENGIE Group launched mosaHYc – a cross-border project for the conversion of gas pipelines to transport hydrogen between France and Germany. GRTgaz, owned with Caisse des Dépôts (60% / 40%), has announced the final investment decision for the 90 km renewable or low-carbon hydrogen network project with its partner CREOS Deutschland. mosaHYc will connect the Greater Eastern region (France) to Saarland (Germany) and the border with Luxembourg. It represents a total investment of €110 million, of which €40 million will be borne by GRTgaz.

GRTgaz, an independent subsidiary of the ENGIE group, is managing the French section of this project (50 km, of which 45 km will be converted pipeline located in the Moselle region), and CREOS Deutschland will be developing the German section (in Saarland) – some 40 km. It will interconnect the towns of Völklingen, Perl (Saarland), Bouzonville, Carling and Saint Avold (Moselle).

The first client will be the Saarland-based steelmaking site in Dillingen operated by RoheisenGessellscha Saar SHS (Stahl Holding Saar group), in Germany. The final investment decision enables the launch of the administrative authorizations phase, followed by the construction and network conversion phase, with commissioning scheduled for 2027. The mosaHYc project will contribute to these regions’ economic and industrial appeal, while at the same time helping them to meet their decarbonisation targets for industry and mobility.