The elephant in the room with these prototype systems is that they currently leverage the excess capacity of existing industrial infrastructure. The chemistry i

The elephant in the room with these prototype systems is that they currently leverage the excess capacity of existing industrial infrastructure. The chemistry involved has unavoidably high power generation requirements because you are fighting a very steep thermodynamic gradient. At anything beyond prototype scales, the industrial infrastructure to provide the raw materials for these prototypes would need to be purpose-built at astronomical scales, including countless terawatts of power generation capacity that does not exist today. The only scalable sequestration technology is biomass for the sole reason that it is the only method that does not require creating new power generation facilities to feed industrial chemistry plants at an unprecedented scale. Sequestering CO2 requires application of energy and mass on the same scale as the energy that was released by putting it into the atmosphere in the first place. You can't cheat the laws of thermodynamics.