CO2 is in the dense supercritical state at the temperature and pressure conditions in storage reservoirs. It's density is between 750 and 850 kg/m3 then (water is 1000). You just have to compress it and pump it down there, and it will stay like that.
Honestly, the storage part is a solved problem from the feasibility side. The remaining challenges are mainly cost optimization, across all of capture, transport and storage.
And the biggest hurdle is forcing businesses to actually pay for the currently externalized cost of CO2 emissions.
Honestly, the storage part is a solved problem from the feasibility side. The remaining challenges are mainly cost optimization, across all of capture, transport and storage.
And the biggest hurdle is forcing businesses to actually pay for the currently externalized cost of CO2 emissions.