Re:A CO2 capture solvent with exceptionally low total costs ...
by derefr on Sunday April 04, 2021 @11:43AM
(#26690343)
> Fill all the mines we’ve emptied over the years
...and why not do exactly that?
Keep in mind, a capture solvent is something that will stably hold onto the CO2 at STP. It doesn’t need special care or treatment; the CO2 just becomes incorporated into its molecular structure, and now that complexed molecule is “what it is.”
So it’s not like we’d be pumping the mines full of pressurized gas. We’d just be pouring a stable, non-reactive liquid or solid in there. Even if the mine had an earthquake, caught on fire, etc., that wouldn’t leak the CO2 back out into the world. It’s not nuclear waste. It’s rock dust.
...and why not do exactly that?
Keep in mind, a capture solvent is something that will stably hold onto the CO2 at STP. It doesn’t need special care or treatment; the CO2 just becomes incorporated into its molecular structure, and now that complexed molecule is “what it is.”
So it’s not like we’d be pumping the mines full of pressurized gas. We’d just be pouring a stable, non-reactive liquid or solid in there. Even if the mine had an earthquake, caught on fire, etc., that wouldn’t leak the CO2 back out into the world. It’s not nuclear waste. It’s rock dust.