Pun-pucking-tastic t1_ja75b05 wrote on February 27, 2023 at 9:56 AM

Reply to comment by Suicicoo in If the fuel that goes in car engines is extracted from hydrocarbons, which consist of only Hydrogen and Carbon, and those hydrocarbons react with Oxygen in the air (combustion reaction), to produce CO2 and H2O, why do we get a bad smell from car exhaust fumes if both gases are odorless? by Protoflare

E-fuels are still carbohydrates. You get the same issues of aromatic compounds that are left unburnt, or incomplete combustion leading to CO emissions.

If you would run the engine with a supply of pure oxygen instead of air you could avoid the NOx problems but that would be ridiculously expensive to do.

Really, the only issue e-fuels don't have is the sulphur content, but that is already pretty low in modern car fuels.