What I found interesting is that storing almost-pure CO2 (which is what they are doing) looks pretty economical. They are a special case that allows to separate pure CO2 as a side-product of their process.
But standard combustion processes output air with a single-digit percent of CO2, and there seems to be no cheap way to change that or separate it from air.
But standard combustion processes output air with a single-digit percent of CO2, and there seems to be no cheap way to change that or separate it from air.