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Suicicoo t1_ja7056u wrote

Reply to comment by ECatPlay 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

would that be better with "clean" manufactured fuel (called E-Fuel in Germany) and a separate O2-supply?

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Pun-pucking-tastic t1_ja75b05 wrote

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.

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