Yes. Another variation on this scheme (which AFAIK the Porsche synthetic fuel plant in Chile is doing) is producing methane from atmospheric CO2 and H2 from ele

Yes. Another variation on this scheme (which AFAIK the Porsche synthetic fuel plant in Chile is doing) is producing methane from atmospheric CO2 and H2 from electrolysis, then converting methane to methanol (how most methanol is produced today, albeit from fossil methane (natural gas)), and finally converting methanol to gasoline with the methanol-to-gasoline (MTG) process. But in the context of corn ethanol in the USA, none of this has anything to do with the environment or sane economics, it's all just an agricultural subsidy scheme.