CO2 subsurface mineral storage by its co-injection with recirculating water

Abstract Carbon capture and storage (CCS) has the potential to help nations meet their Paris Agreement CO 2 reduction commitments 1,2 . The ability to capture CO 2 within mafic and ultramafic rocks through mineralization of carbon is an example of such a CCS technology 3,4 , but large-scale deployment has yet to be achieved 5,6 . Each geologic environment in the Earth’s crust requires a distinct carbon storage solution. Whereas some regions of the subsurface contain saline aquifers and sedimentary traps suitable for traditional carbon storage through the injection of high-pressure, dense CO 2 below impermeable caprocks, other regions may lack caprocks 5–9 . In these regions, carbon storage is possible through…