Almost a kilometer under old coal mines in Lorraine, France, scientists have found a pocket of natural hydrogen, called white hydrogen. Early tests suggest it burns clean and could be cheaper than factory-made green hydrogen.
Some reports call it “the last fuel of humanity”, a resource that might power our world for thousands of years. Behind that phrase, researchers and energy companies are racing to measure how much hydrogen is there and how hard it will be to extract.
A buried hydrogen jackpot in old French mines
The find comes from the Lorraine mining basin near the town of Folschviller, where a well drilled to study coal seam methane unexpectedly revealed rising hydrogen levels with depth.
Regalor project measurements found gas with more than 15% hydrogen at around 1,100 meters and strong signals near 950 meters in nearby wells.
Early assessments talk about tens of millions of tons of hydrogen, possibly making it one of the largest natural reserves in Europe. The work is led by geologists Philippe de Donato and Jacques Pironon at the GeoRessources Laboratory in Nancy, together with energy producer La Française de l’Energie, now drilling more wells under an exploration permit.
What makes white hydrogen different
Natural hydrogen is gas that forms underground when water reacts with iron-rich rocks or when natural radiation splits water molecules inside the crust. Instead of being made in an industrial plant, it can build up over long periods in rock layers that also trap oil and natural gas.
Scientists call this naturally formed gas white hydrogen because its creation does not emit carbon dioxide. A policy briefing from the Royal Society says that high-purity deposits could have climate impacts similar to, or even lower than, renewable-powered green hydrogen once extraction and processing are counted, and notes that exploration is under way in many countries.
Renewable hope, real world limits
Supporters say hydrogen in Lorraine may recharge as deep rocks react with water. That helps explain why some popular articles talk about energy that could last thousands of years and describe natural hydrogen as almost inexhaustible.
Specialists who model hydrogen flows in the crust warn that global data are still scarce and that there is little solid evidence for a truly endless fuel source. A recent analysis in the magazine GeoExPro suggests that realistically recoverable hydrogen in the Lorraine permit could be far lower than headline figures once rock properties and well productivity are considered.
For people near the mining towns, a modest project could mean cleaner air, quieter trucks and more stable energy prices. Whether that vision becomes real will depend on drilling results, technology tests and policy choices in France and in other countries now hunting for their own white hydrogen.
The main findings about the Lorraine white hydrogen discovery have been presented in CNRS News, and the official press release on this discovery was published on the website of La Française de l’Energie.
