GRTGaz launched fundamental engineering studies in January. This is an essential step before launching the construction of the future hydrogen transport infrastructure within this industrial and port complex.

The DHUNE project is taking concrete shape following a successful call for expression of interest and the completion of the first feasibility studies in 2023. These studies were co-financed by the French government as part of France 2030 (operated by ADEME and integrated into the “DKarbonation” regional decarbonisation project, led by Euraénergie. The Dunkirk Hydrogen Universal Network is a pipeline project in an area that accounts for 20% of France’s industrial CO2 emissions.

Within 18 months, the studies will lead to an “initial comprehensive engineering design”, explains Marion Lacombe, Business Developer in GRTgaz’s Development Department. This will enable us to examine every aspect of the project, from the planned outline to the technical, land, administrative, environmental and industrial safety issues involved. And to make a final decision in 2025.

A first 10 km stretch before connecting with Belgium

The aim is to bring a first 10 km stretch of transmission network into service in 2027. So far, the DHUNE project has the support of ArcelorMittal, which is one of the first three industrial customers actively involved, along with Imerys (specialty minerals for industry) and hydrogen producer H2V.

After 2030 (2034 according to the schedule), the DHUNE network should extend into Belgium. It will reach around 50 km in France, including a hydrogen terminal in the port of Dunkirk. More importantly, it will join the Hydrogen European Backbone. The DHUNE project is the first phase of a wider Franco-Belgian hydrogen corridor project led by GRTgaz, which was designated a “Project of Common Interest” by Europe in November 2023.

With WHHYN (Wallonie Hainaut Hydrogen network) in Belgium and DHUNE in France, this corridor will play a crucial role in connecting the North Sea, Dunkirk, Belgium and the hydrogen basins of the Paris and Grand Est Regions.

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Article written by Laurent Meillaud and translated by Mariem Ben Tili