|>>|| No. 4418
Journal article here: https://www.cell.com/joule/fulltext/S2542-4351(18)30225-3
From what I understand, air is extracted from the atmosphere, the CO2 is separated and liquefied and turned into a fuel, to be used with hydrogen. This is supposedly, carbon neutral or "carbon-free energy". What are the waste products of using this as an energy source? Is it carbon neutral because no new carbon is being released into the atmosphere i.e. the only CO2 used is released back (net increase zero)?