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Charlie is right, you can extract the ethanol with water. Best practice would be multiple small washings to reduce it to a negligible level, but octane would suffer. Also, your price of auto fuel just went up, because you are sending some down the drain.
Basically there is a partition coefficient for alcohol between gasoline and water. Each time you add water, x% moves to the water.
Bill Schertz
KIS Cruiser #4045
N343BS
Phase one testing Completed
-----Original Message----- From: Charlie England
Sent: Thursday, May 12, 2011 1:35 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 100LL in California
Getting it out is simple; just add water. Then shake. Then sump the
water. But you wouldn't want to use the result in any engine except a
rotary; the octane just went down several points. Some of the octane
enhancers are replaced by alcohol when it's in the mix.
Charlie
On 5/12/2011 12:42 PM, H & J Johnson wrote:
Has anyone looked at methods to get the ethanol back out of gas? I'm thinking there must be some type of process. I know
in making bio-diesel they 'wash' the fluid and then run it through seperators [or let it settle] to get the water back out. It sounds
crazy but would it not be possible to do something similar w/ gas? I'm thinking some kind of little contained setup that a guy
could dump is 5Gal can into, it runs through and seperates off the two. The ethanol could get disposed [I dunno.. in the lawn
mower?] and the gas is off to the plane? IIRC [not tested personally] we are the same in Central Canada in that the higher
octane stuff doesn't have ethanol in it.
Would misting water into gasoline allow it to combine w/ the ethanol [I know it sounds totally crazy :) ] ??
I know water will suspend in Jet fuel, is gasoline the same in that it can/will hold water in suspension? If you know how much
water you put in [vs volume of fuel] and you know the rated ethanol percentage, you can calculate if your getting all the water/ethanol
back out or not.
Just thinking out loud at this point... :)
Jarrett Johnson
www.innovention-tech.com
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