RHYn

RHYn is a 100% hydrogen pipeline project in the Upper Rhine Trinational Metropolitan Region. Its aim is to connect consumption to the production of renewable and low-carbon hydrogen in order to ensure security of supply for all market players in the territory.

RHYn consists of approximately 100 km of pipelines, two thirds of which are retrofitted. Its capacity will be 190,000 t of hydrogen per year, the equivalent of approximately 1,400 MW of electrolysis. Commissioning is scheduled for 2029.

The gas network operators GRTgaz, terranets bw and badenovaNETZE are working together on the hydrogen interconnection between Southern Alsace and South-West Baden-Württemberg. The RHYn and RHYn Interco projects are labelled Projects of Common Interest by the European Commission and are candidates for subsidies under the Connecting Europe Facility.

GRTgaz is also working with Industrielle Werke Basel on the interconnection with Switzerland.

High potential for industrial demand The Chalampé – Ottmarsheim industrial zone is now the 2nd largest hub in terms of hydrogen consumption in France. Its production of 2.4 TWh of fossil hydrogen per year is the equivalent of 15% of French production by SMR. The companies present in the zone have significant decarbonization ambitions that can be achieved by eventually replacing old hydrogen sources with electrolysis and by developing new uses. High-potential sectors include: chemistry, glass manufacturing, semiconductors, transport equipment and machinery, as well as the agri-food sector.

• 05/2022: Project integrated into the ZIBaC call for projects
• 09/2023-11/2023: Call for Expression of Interest
• 06/2024 - 02/2025: Feasibility study

• 04/2025 – 03/2027: Basic studies
• 07/2027 – 12/2028: 2028: Detailed study
• 12/2029: Commissioning

• Diameter: Mainly 400 mm with a few sections of 250 mm and 150 mm.
• Length: Approximately 100 km in total, of which 60 km will come from converted pipes.
• Capacity: 20 GWh/day.

The pipeline will have the capacity to transport 190,000 tonnes of renewable or low-carbon hydrogen per year, which will thus be integrated into the French and European energy system. This is the equivalent of the production of 1,400 MW of electrolysis and could avert up to 2 million tonnes of CO₂ emissions per year.