If you really want to know, yes, while not recommended I have downed a swig of 200 proof ethanol just to say I did. Technically probably 199.5. As you say 200 is difficult but possible to obtain. You are thinking of distillation. You cannot distill ethanol all the way to 200 proof. It reaches the ethanol-water azeotrope of approximately 95.6% ethanol and 4.4% water by weight that boils at a constant temperature of 78.2°C, which means the vapor that boils off has the same concentration as the liquid you are boiling.uh, no. But you could if you diluted it with water.
You don't need to get all the way to 100% before you hit the point that it will do damage going down, and then to where it ends up.
Getting it beyond 95% (iirc. or is it 90?) takes serious effort, and it will interact with pretty much anything, resulting in dilution.
At that price, it makes lots of sense (in an engine that can handle it).
The breakeven is somewhere around 75% of gasoline price.
(alcohol has 2/3 the energy of gasoline by volume. So what happens when you replace 75% with 2/3 is left as an exercise for the reader.)
To purify further you dehydrate the ethanol.
But generally speaking I was referring to "pure ethanol" not mixed with gasoline, your body could tolerate. While gasoline of course it cannot.
I use "tolerate" because I don't think ethanol is "good for you".
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. Maybe sell the left-over bio-char at farmers market?
