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  1. 01-02-2016, 08:14 AM #24
    FlyingRon
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    Quote Originally Posted by PaulMillner View Post
    Flash and octane rating re unrelated... At any given flash point, there are zero octane and 100 octane molecules available.
    Octane rating has nothing really to do with "octane" molecules. It's a measurement of detonation resistance compared to a pure octane source. Ethanol has zero octane molecules in it. Propane which has a very high octane (and very low flash point as well) and no octane moledules in it.

    Another property, probably more related to octane rating is the auto-ignition temperature. For gasoline it's up around 280C where diesel is down around 260 an ethanol at 360.
    Last edited by FlyingRon; 01-02-2016 at 08:17 AM.
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