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Engineered mineral hydrogen is an elegant idea. Water reacts with iron rich magnesium and iron rich, silica poor igneous rock — ultramafic — from Earth’s mantle rocks to release hydrogen, and with the right chemistry and temperature you can raise reaction rates and collect a clean product. In the lab and in models this pathway looks promising.
In the field it asks for the same muscles that shale, tight gas and enhanced geothermal developed over years. You need reliable drilling, completions, stimulation, reservoir monitoring and production operations. You also need an offtaker next door that wants steady molecules for decades. That is where the real world starts to pinch. Just as with microbial hydrogen underground technology I looked at recently, what works in the lab starts to look like nonsense in the field.
The geology is not where the rigs…
