There's a few options out there, the most common method is solvent absorption [1]. There's also a YC backed startup, Prometheus Fuels, that's trying to commerc

There's a few options out there, the most common method is solvent absorption [1]. There's also a YC backed startup, Prometheus Fuels, that's trying to commercialise a process using carbon nanotube membranes for CO2 separation [2]. [1] https://web.archive.org/web/20130508220516/http://www.uk-shec.org.uk/uk-shec/news/IEEE_Paper_6_3_5_finalx1x.pdf https://web.archive.org/web/20130508220516/http://www.uk-she... [2] https://prometheusfuels.com/ https://prometheusfuels.com/