Three technologies to produce low-carbon hydrogen

1. By reforming methane, fossil-based, and capturing CO₂ emissions

Methane reforming is currently the most widely-used method to produce hydrogen. To limit the impact of this production, Air Liquide has developed Cryocap^TM. This cryogenic process (involving low temperatures to separate gases) enables a reduction in CO₂ released during hydrogen production while also increasing the hydrogen production efficiency.

2. By reforming biomethane

It is also possible to produce hydrogen through reforming but using biomethane as a source. This makes it possible to switch from fossil fuel-based gases to a gas derived from the decomposition of organic waste and thus with a low-carbon footprint.

3. Through water electrolysis

This is an alternative method of producing low-carbon hydrogen by using water and electricity produced using renewable energies (solar, wind, etc.). The electrolyzer separates oxygen from hydrogen, which is then compressed and stored.