For cost-effective CCS implementation, carbon capture must be economically viable. Since CO2 capture efficiency accounts for a major portion of overall costs—between 60 and 80 percent—it is imperative that this be done with careful consideration. We want to lower the carbon footprint of new developments by repurposing old infrastructure in line with the Circular Economy.
CO2 is useful in enhanced oil recovery (EOR), where a portion of the carbon is sequestered after injection and remains in the rock for the duration of the cycle. Furthermore, at lower subsurface temperatures, CO2 can function as a geothermal heat transfer fluid component, allowing for the economically advantageous combination of geothermal heat extraction and carbon storage in enhanced geothermal systems (EGS).