Carbfix

Carbfix is an Icelandic company that has developed an approach to permanently store CO₂ by dissolving it in water and injecting it into basaltic rocks. Once in the subsurface, the injected CO₂ reacts with the host rock forming stable carbonate minerals, thus providing permanent storage of the injected CO₂

Approximately 200 tons of CO₂ were injected into subsurface basalts in a first-of-a-kind pilot injection in SW-Iceland in 2012. Research results published in 2016 showed that 95% of the injected CO₂ was solidified into calcite within 2 years, using 25 tons of water per ton of CO₂. Since 2014, this technology has been applied to the emissions of the Hellisheiði Geothermal Power Plant. H₂S and CO₂ are co-captured from the emission stream of the power station and permanently and safely stored via in-situ carbon mineralization at the Húsmúli reinjection site. The process captures approximately one-third of the CO₂ emissions (12,000 tCO₂/y) and 60% of the H₂S emissions (6,000 tH₂S/y) from the power plant. The Silverstone project aims to deploy full-scale CO₂ capture, injection, and mineral storage at the Hellisheiði Geothermal Power Plant from 2025 onwards.

Carbfix is currently operating four injection sites in Iceland in relation to the Hellisheiði Geothermal Power Plant: the Nesjavellir Geothermal Power Plant, The Orca direct air capture plant near Hellisheiði and within the CO₂ Seastone project in Helguvík (see chapter “Current status”). Provided by Wikipedia