Amazing stuff! Nature captures/binds much more CO2 than previously thought! Climate models are junk!
More evidence that global warming is a hoax and climate change is a religion!
We still know far too little about the highly complex natural phenomenon called climate! Climate change has become a major subject for demagogues and profiteers!
"Rocks can bind carbon dioxide — and much faster than previously thought. For a long time, it was assumed that the transformation of CO2 into carbonate rock depends on very slow, time-consuming processes. According to that view, the binding of CO2 injected industrially into the ground would take centuries. However, practical observations and theoretical calculations suggested that there may also be a much faster route from CO2 to carbonate, mediated by water acting somewhat like a catalyst. This suspected mechanism has now been demonstrated for the first time at TU Wien, using imaging techniques on the atomic scale. ...
The “bent” carbon dioxide molecule can then attach directly to the wollastonite, forming a stable bond — without the wollastonite having to dissolve first. “Without water, this is not possible, because the right docking site is missing,” says Giada Franceschi. “But even a tiny amount of water is enough to completely change the interaction between CO2 and wollastonite.” ..."
From the abstract:
"The carbonation of silicate minerals is a key process in the Earth’s carbon cycle and offers a promising avenue for long-term CO2 sequestration. However, the atomistic mechanisms by which CO2 is activated at silicate surfaces remain poorly understood, largely due to the intrinsic complexity and insulating nature of these materials.
To close this gap, wollastonite (CaSiO3) is used as a model system. Noncontact atomic force microscopy (nc-AFM) with functionalized tips is combined with density functional theory (DFT) to investigate its lowest-energy (100) surface under ultrahigh vacuum (UHV).
Upon cleaving the mineral in UHV, water vapor is released from the sample and spontaneously readsorbs into a previously unreported, exceptionally stable configuration.
The resulting surface hydration layer promotes spontaneous CO2 chemisorption and the formation of surface carbonates with negligible kinetic barriers.
Our results offer atomic-scale evidence of gas–phase carbonation on a silicate mineral, revealing a water-assisted pathway for CO2 capture that bypasses aqueous mineral dissolution."
Molecular Views of Mineral Carbonation: Reaction of CO2 with the Wollastonite (100) Surface (open access)
Graphical abstract