underground rocks forces a chemical reaction (serpentinization) that permanently locks the carbon into solid stone while producing clean hydrogen. It is a powerful "climate double win" that sequesters emissions safely and generates zero-carbon fuel in a single step.

Injecting water loaded with CO2 into underground rocks forces a chemical reaction (serpentinization) that permanently locks the carbon into solid stone while producing clean hydrogen. It is a powerful "climate double win" that sequesters emissions safely and generates zero-carbon fuel in a single step. 

The mechanics behind this promising technology involve a few key factors:

The Chemistry: -

When CO2 CO2-rich water makes contact with iron-rich rocks (like basalt or ultramafic rocks like olivine), the acidic water strips iron and magnesium from the rock structure, naturally triggering the release of hydrogen gas (H2 H2).

The "First Win" (Carbon Storage): -

The displaced metals react with the CO2 CO2 to form solid, stable carbonate minerals (like limestone/calcite). 

This mineralisation permanently locks the carbon away within months to years, posing zero long-term leakage risk compared to traditional gas reservoirs.

The "Second Win" (Hydrogen Production): -

The naturally occurring hydrogen gas can be captured and utilized as a zero-emission energy source for heavy industry, transportation, or power.

Economic Viability:-

 Generating hydrogen while storing CO2 .CO2 gives companies a dual revenue stream—they can potentially charge for carbon storage while selling the produced hydrogen, drastically improving the economic viability of the projects. 

Pioneering organizations like Carbfix in Iceland have already demonstrated large-scale CO2CO2 mineralisation, proving that turning carbon to stone safely works on an industrial level. The next frontier for research is optimizing how to scale these underground operations to extract the hydrogen efficiently.

MJF Lion ER YK Sharma