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The ISS has a clever trick of using zeolite beds to absorb CO2 (a rock with pores that selectively hold onto CO2, and H2O but they dry the air first), and then

by gpm 2y ago

The ISS has a clever trick of using zeolite beds to absorb CO2 (a rock with pores that selectively hold onto CO2, and H2O but they dry the air first), and then venting it to space to get rid of the CO2 and recharge them.

hollerith 2y ago
I wonder whether they need to heat the zeolites to help them release the co2 or whether exposure to vacuum is enough.
- gpm 2y ago
  If I recall correctly they do heat it (I dug up the documents on this awhile ago, just going from my memory right now).