@osma my (non-expert) understanding of the physics of 'carbon capture' have me thinking that it MUST use more energy than fossils created to make the energy output, and that the only way they could possibly make sense is if you had an overabundance of renewable electric input to feed them.
In short: Carbon Capture *might* be something we need *after* a global green energy revolution, or to soak up power if you build enough nuclear to exceed baseload, but it's a massive distraction until then.
IMO, the most efficient 'carbon capture' is probably to grow grasses, harvest it, bundle it up under tarps that divert water to prevent it from biodegrading, and keep layering on top. Basically landfilling grass.