Ophiolites are slices of the Earth’s mantle that make hydrogen on their own and turn CO₂ into stone. Decahydron is building one business on both: supplying clean hydrogen to industry, and storing CO₂ permanently for the emitters who have to pay for every tonne they release.
Both markets are large, both are short of supply, and in both the price of doing nothing keeps rising.
Of hydrogen used worldwide each year, almost all of it made from natural gas and coal. Less than 1% is low-emission.
Of CO₂ that must be captured and stored every year by 2030 to stay on a 1.5 °C path. About 64 Mt a year is stored today.
In Europe, every tonne of CO₂ has a price, allowances shrink every year and free allocation for industry is being phased out. Emitters need somewhere to put their CO₂.
Sources: IEA, Global Hydrogen Review 2024; IEA, Net Zero Emissions by 2050 Scenario; Global CCS Institute, Global Status of CCS 2025.
A 2010 exploration well already reaches the fractured mantle rock, and the gas logged while drilling points to hydrogen below a dense seal. Re-entering an existing well to measure the gas and test the flow costs a fraction of drilling a new one.
Europe’s first field demonstration of water-free CO₂ mineralisation. The CO₂ comes from Holcim’s HERACLES cement plant: a real emitter as the first client.
The largest exposed ophiolite on Earth, next to the world’s fourth-largest bunkering port. Under an MOU with FOIZ, surface work comes first, then exploration wells with a CO₂ injection trial.
Hydrogen from the ground, sold to refineries, ammonia and steel makers under long-term contracts. It competes with grey hydrogen, whose price carries the cost of gas and, increasingly, of carbon.
Emitters pay per tonne stored. Mineralised CO₂ becomes rock: onshore, close to the plant, with nothing left to leak and no liability to carry for centuries. Independently reviewed by EY, at a fraction of the cost of offshore storage.
The two meet in one process: injected CO₂ reacts with the rock and releases hydrogen as it turns to stone. Hydrogen from CO₂
The oil and gas toolkit was designed for sedimentary basins. We have developed our own technology to explore ultramafic rock: to find where hydrogen forms and collects, and where CO₂ can be stored, and to drill and test it.
Weatherford is a shareholder and our drilling contractor. SNOC, FOIZ, Holcim and HEREMA are partners on the ground.
No resource claims ahead of the data: we publish what wells measure, not what they might produce. Our view of the industry
Patent applications cover the processes behind both businesses.
Our AI platform screens every ultramafic belt on well data, seismic and the published literature before we commit capital.
Partnership with Weatherford for natural hydrogen exploration.
Strategic investment from Weatherford. Collaboration with SNOC in Sharjah.
MOU with FOIZ for Fujairah. Patent applications filed.
Re-entry and flow test of the Sharjah well, early in the year.
PITHOS injection in Othrys. First exploration wells in Fujairah.
Decahydron is run by people who have drilled wells, injected CO₂ and financed energy projects, at BP, TotalEnergies and ADCO, on the Al Reyadah CO₂ injection project and through three IPOs.
We share our technical reports, models and independent reviews with qualified investors under a confidentiality agreement. Write to [email protected] to request access to the data room.
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