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A comment on Direct conversion of CO2 to solid carbon by Gallium-based liquid metals. Parent comment

Re:Direct conversion of CO2 to solid carbon by Gallium-based... by astrange on Tuesday January 18, 2022 @10:02PM (#29989410)
> We could start pulling more CO2 out of the atmosphere than we put in, and at that point we'd be pretty confident things won't get worse for the climate.

How much of the atmospheric CO2 can you actually capture with stations at ground level? I assume this isn't critical since I haven't seen anyone propose a Tower of Babel of carbon capture machines, but I'm not sure why it isn't.

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Re:Direct conversion of CO2 to solid carbon by Gallium-based... by Smithalicious on Wednesday January 19, 2022 @05:26AM (#29991918)
The CO2 diffuses through the air. The same way you can make something crystallize completely out of water too, the concentration will want to equalize throughout the medium.

Of course it's going to be more efficient with more air flow, I don't know how turbulent the wind really is, how I could picture it in terms of something I understand like a bottle water, but I assume pretty turbulent?

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Re:Direct conversion of CO2 to solid carbon by Gallium-based... by krallja on Tuesday January 18, 2022 @10:18PM (#29989515)
Air moves.
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Re:Direct conversion of CO2 to solid carbon by Gallium-based... by astrange on Wednesday January 19, 2022 @03:08AM (#29991109)
All of the air from here to the Karman line moves over the spot you put your capture machine?
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Re:Direct conversion of CO2 to solid carbon by Gallium-based... by krallja on Wednesday January 19, 2022 @10:00AM (#29994395)
Yes, eventually. CO2 is referred to as a “well-mixed greenhouse gas” because its concentration is relatively stable across the entire surface of the earth. https://www.gfdl.noaa.gov/blog_held/6-transient-response-to-...
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Re:Direct conversion of CO2 to solid carbon by Gallium-based... by MauranKilom on Wednesday January 19, 2022 @09:39AM (#29994089)
Eventually, yes.
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