Using a sorbent, to absorb the CO2 in preference to N2/O2/Ar (etc.). The 'sorbed CO2 is then de-sorbed in a closed container (for compression, storage, etc.). S

Using a sorbent, to absorb the CO2 in preference to N2/O2/Ar (etc.). The 'sorbed CO2 is then de-sorbed in a closed container (for compression, storage, etc.). Selexol is a common commercial solvent for CO2 removal, though for atmospheric removal other tech may be preferable.