With time, heat, and pressure, wouldn’t
Carbon Capture make... ..coal?
“With time, heat, and pressure, wouldn’t
Carbon Capture make... ..coal?”
Not coal no. Coal is the remains of swamp plants you need a certain carbon to hydrogen ratio for coal.
CO2 has no hydrogen and the rocks it is injected into would not have much either chemically bonded in them. Sandstone is SiO4 silicates mostly. I guess under near mantle conditions you might get graphite and the oxygen would bind to the silicate host rocks in a SiO6 octahedra. Graphite<> coal plus it would be so deep as to never be exploitable as a carbon source at that point.