Air Liquide’s electrolysis projects are developed in partnership with major public and private stakeholders, collectively driving the hydrogen market forward.
THE AIR LIQUIDE NORMAND’HY PROJECT: A FLAGSHIP ELECTROLYZER IN FRANCE
Air Liquide Normand’Hy is a 200 MW PEM electrolyzer under construction near PortJérôme-sur-Seine, in the Seine Valley, one of France’s main industrial and energy basins. This industrial region, which generates a significant share of CO2 emissions, accounts for roughly one-third of national hydrogen consumption, with a high concentration of refining, chemicals and logistics activities that already rely on hydrogen. The site benefits from direct access to water drawn from the Seine, treated and purified on site, as well as from dedicated high-voltage connections supplying renewable and low-carbon electricity. At the end of the process, a part of the water withdrawn is returned to the natural environment after treatment.
Planned to be commissioned in 2026, Normand’Hy will be the largest electrolyzer of its kind in Europe, designed to produce around 28,000 tonnes of renewable and low-carbon hydrogen per year. Most of the hydrogen produced will supply the nearby TotalEnergies refinery under a long-term contract, for use in desulfurization and other refining processes. Additional volumes will support intensive mobility along the Seine axis, via a new hydrogen packaging and delivery centre designed to supply refueling stations.
The entire project represents an investment of more than 450 million euros(1). Through its combination of large‑scale electrolysis and existing assets such as hydrogen pipelines, it showcases how established infrastructure can be leveraged to decarbonize major industrial sites.
28,000 tons of renewable and low-carbon hydrogenproduction capacity per year
ELYgator electrolyzer construction site, in Maasvlakte, the Netherlands.
ELYGATOR: A LARGE-SCALE PROJECT IN THE NETHERLANDS, POWERED BY OFF-SHORE ELECTRICITY
In July 2025, Air Liquide made the final investment decision for ELYgator, a 200 MW electrolyzer in Maasvlakte, within the Port of Rotterdam. The Group will invest more than 500 million euros to build, own and operate this largescale unit, backed by the Dutch OWE subsidy scheme, the EU Innovation Fund and the IPCEI(2) Hydrogen program.
Scheduled to be operational by the end of 2027, ELYgator is expected to enable the avoidance of up to 300,000 tons of CO₂ emissions each year over its operating life. The plant will supply industrial customers in the Rotterdam area, including the TotalEnergies industrial platform, under a long-term contract.
Technologically, ELYgator is a milestone: it will be the first project to combine Siemens Energy’s PEM and alkaline electrolysis technologies at a single site, enabling the Group to balance efficiency, flexibility and costs while ensuring high reliability. ELYgator showcases Air Liquide’s ability to deliver complex infrastructure in one of Europe’s largest energy and chemical hubs, reinforcing its role as a strategic partner to major refineries in their transition to renewable hydrogen.
A STRATEGIC 250 MW ELECTROLYZER PROJECT WITH TOTALENERGIES
In parallel, Air Liquide and TotalEnergies have created a 50/50 joint venture to develop a 250 MW electrolyzer in the Zeeland province, Netherlands. Powered by renewable electricity from TotalEnergies’ share of the OranjeWind offshore wind farm, this project aims to produce up to 30,000 tons of renewable and low-carbon hydrogen annually.
This project sends a strong signal about the long-term partnership between Air Liquide and TotalEnergies in decarbonizing industrial assets. More broadly, it illustrates Air Liquide’s strategy: focusing on large, anchored, long-term contracted assets in robust industrial regions, while progressively scaling technology and building a portfolio that reinforces the Group’s leadership in low‑carbon hydrogen in Europe.