Clean Hydrogen Out

Waste Carbon In

Two of the world's biggest challenges. One nature-led solution.
Decahydron is unlocking the power of Earth’s geology to fuel a carbon-negative future. We extract naturally occurring hydrogen, a clean energy source, from deep underground, while using the same rock formations to mineralize CO₂ and turn industrial emissions permanently into stone. Crucially, our technology is designed to do both at the scale the planet needs.

Nature’s Clean Hydrogen

Across the globe Decahydron has identified formations of ultramafic rock, rich in iron- and magnesium-bearing minerals like olivine. When water infiltrates these rocks, a chemical reaction known as serpentinization occurs that releases molecular hydrogen (H₂).

This hydrogen collects in rock fractures and pore spaces, trapped over geological time. Decahaydron is perfecting the technology to access and extract natural hydrogen, sustainably and affordably at scale, at a predicted cost of under $1/kg.

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Turning Carbon into Stone

These same abundant ultramafic rocks also hold a second superpower, they can also absorb and permanently lock away carbon. When CO₂ is injected into these rock formations under the right conditions, it reacts with magnesium and calcium in the rock to form solid carbonate minerals.

This process is known as mineral carbonation, and unlike many other carbon removal methods, it is permanent. The CO₂ doesn’t just get stored, it becomes stone.

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Turning Carbon into Stone

These same abundant ultramafic rocks also hold a second superpower, they can also absorb and permanently lock away carbon. When CO₂ is injected into these rock formations under the right conditions, it reacts with magnesium and calcium in the rock to form solid carbonate minerals.

This process is known as mineral carbonation, and unlike many other carbon removal methods, it is permanent. The CO₂ doesn’t just get stored, it becomes stone.

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Clean Energy Out, Emissions Locked In

At Decahydron we have developed a single process that brings both benefits together. Our proprietary induced-generation methodology injects super-saturated CO₂ into ultramafic rock formations. This displaces trapped hydrogen, which we then extract and purify, while simultaneously mineralising the CO₂ and locking it away permanently as solid rock.

And because induced-generation stimulates hydrogen release directly at the source, it allows more to be recovered from each well, minimizing surface infrastructure and capex costs.

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Our Advantage

Sustainability

We extract hydrogen from rocks, not from fossil fuels, with no electrolysers and minimal water usage.

Scale

Ultramafic rocks are globally abundant, enabling climate solutions at planetary scale.

Permanence

CO₂ becomes stone through mineralisation. No leaks, no pressure, no reversal.

Duality

Hydrogen out, carbon in. One geology, one project, double the climate impact.

Efficiency

Our method boosts hydrogen yield and cuts CAPEX.

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