Larry;
Let's look at the "chemical" end of this question.
1) Water and alcohol are fully miscible: what this means is that these
molecules have such a strong affinity for each other that they "bind"
together with a strong enough bond that they will not naturally separate
(i.e., don't think that you can take a water/alcohol blend and put it in
a container and "hope" that it will separate on its own [within the
constraints of saturation of one molecule or the other]). 2) having
said that, don't even think that your "gascolator" is going to separate
this from the fuel stream. 3) In theory, if you have a fuel with
gas/ethanol and add water to it, then run it through a strainer
specifically designed to separate water from fuel, you will remove the
ethanol as well...
Having said that, it seems like a hell of a lot of work to get something
(ethanol free gas) that you can find at many gas stations. I live in one
of those counties in Wisconsin that is under EPA scrutiny, so can't buy
it locally, but four miles away is a county not under the same EPA
oversight that has 89 and 91 octane ethanol free (and lead free) gas. I
run it in my yard equipment.
To give you a technical answer to your question (10% ethanol in 5
gallons of gasoline) you first need to determine is the blend V-V
(Volume for Volume) or W-W (Weight for Weight). Gasoline is 6.3#/gal.:
Ethanol is 6.58 #/gal.... so for a barn yard chemist, they are "close
enough for KR work".
A 90/10 blend would be a half gallon of ethanol per five gallons of
fuel. Water is 8.35 #/gal.....
According to some publications, the proportion of water to ethanol
(alcohol) is not important, so, again, theoretically, if you dump a half
gallon of water into your ethanol/gasoline 10% blend, you should be able
to separate the ethanol by filtering out the water with the appropriate
filter media... again, why bother? As another respondent noted, you
would also need to deal with the change in anti-knock properties of the
fuel.
Even at six bucks a gallon, the time you spend with all of the B/S and
other stuff (even if you are retired, like me, and your time is "free")
would buy you some awesome Southern Illinois Biscuits and Gravy at your
favorite airport restaurant if you just spent the $120 to fill up the
plane and go fly.
JMHO
Mark W
N952MW (res).
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>...
On 9/30/2022 1:37 PM, Flesner via KRnet wrote:
I found the following on the internet:
*"Water is absorbed into ethanol* because water molecules are small
enough to fit between the larger ethanol molecules."
Question: If I have a fuel strainer that blocks water but will pass
gasoline can I add water to gasoline containing alcohol and then pass
the fuel mixture through the strainer to remove the water / alcohol
mix? Will the alcohol separate from water and pass through the
strainer? IF this process removes the alcohol from the gasoline what
is the amount of water needed to remove 10% alcohol from 5 gallon of
gasoline?
There has to be a catch here or everyone would do it. I have a dozen
or more 5 gallon fuel containers that I used at one time to get free
100LL from the waste barrel and filter for use in the KR. That option
is no longer available and $6 a gallon 100LL is not a great incentive
to go flying.
Inquiring minds want to know?????????????
Larry Flesner
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