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Random crazy idea alert:

This is actually close to the temperature to sublimate CO2. I'm curious why we couldn't lower the temperature a little more and pull carbon out of the air? Has anyone investigated that?

Maybe I should buy some land there and start making dry ice and selling carbon offsets?

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The partial pressure is too low:

http://wattsupwiththat.com/2009/06/13/results-lab-experiment...

But you just need to lower the temperature another 20-40 degrees. It would still take some energy but since youre starting at such a low temp It would seem it would save a lot of energy.

The link is pretty convincing. What it amounts to is that there is so little CO2 in the air that sublimation into the air happens faster than any freezing out of the air.

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