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Can't find the basic science of the idea in the article - which chemical process makes rock (also which rock) capture CO2? Is there a ton of rocks out there tha
by H8crilA 6y ago
Can't find the basic science of the idea in the article - which chemical process makes rock (also which rock) capture CO2? Is there a ton of rocks out there that are rich with unbound metal oxides?
- colechristensen 6y agoThere are many minerals which are ionic compounds of silicon oxides on one side and metal compounds on the other. Grind them up real fine and many of the metals will preferably react with carbon dioxide to make, for example, calcium carbonate (CaCO3) and the silicon and oxygen become silicon dioxide which is ordinary sand. There are indeed a ton of rocks out there bound less tightly to other things. High heat (say, magma) would break up the carbonate so thats why the rocks arent already in that chemical state. (simplified answer from a non specialist)
- H8crilA 6y agoThank you, that makes perfect sense!
- Flogiston 6y ago2CO, + H,O + CaSiO, -> Ca'+ + 2HCO,-+ SiO, -29.6 kcal Underlined digits are lost after copypaste. So in the end you have Calcium bicarbonate that becomes unsoluable carbonate in the end. Its just proof of concept, in the terraforming scales(time + volume of chemicals) it can work, but dropping dust on fields seems like joke