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As the previous post states, ethanol is the same alcohol in beer. You ever put a beer in the freezer?
I have....and it turns into a beer slurpee that foams all over the place when you open it!!! But then again, beer is only 3-5% alcohol in most cases and it is the water in beer that freezes. I think a more accurate comparison would be putting hard liquor in the freezer. Put a bottle of Vodka in the freezer and all you get is cold vodka (and that's only about 40% alcohol. E85 is 85% alcohol and Ethanol has a freezing point of -114C (about -237F).
I agree, you are probably thinking about Diesel or Biodiesel in terms of gelling or thickening.
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Any reason why truckers could not use ethanol to keep air lines from freezing? I watched "ICE ROAD TRUCKERS" last season ( was that filmed in Minnesota? ) and freezing air lines was a big problem. I think they were using methanol, or some form which is poisionous. Ethanol ( in pure form ) isn't.
An "Ice Road" I was on in MN recently.
Had -40 WCF last night.