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Where is the (pure ?) CO2 needed from such a plant typically sourced from ? Does it have to be captured at a gaz / coal power plant exhaust ? Or would it make s
by phtrivier 4y ago
Where is the (pure ?) CO2 needed from such a plant typically sourced from ? Does it have to be captured at a gaz / coal power plant exhaust ? Or would it make sense to use CO2 captured from atmosphere (once the tech matters ?)
- bertil 4y agoAtmospheric capture today is far too energy-intensive to justify the effort. It’s likely far cheaper as of now to capture it from existing plants mixed with N2 and other gases at the plant, compress and liquefy it for purity, and truck or pipe it to the plant. That’s assuming that we have CO2-emitting factories, which are hopefully gone soon. If most of the hydrocarbon is synthetic and burned by airlines, tapping the exhaust isn’t an option. I’m not sure whether it will be cheaper to capture CO2 in the atmosphere or run alternative ways to travel.
- phtrivier 4y agoUnfortunately CO2 is not emitted only from power plant. Some industrial process just spew it on their own (cement or fertilizer production is often cited, but I don't know enough about the chemistry.)