From: Bjorn Brandstedt (super_deuce@hotmail.com)
Date: Sat May 06 2006 - 06:40:16 PDT
Well, I guess it will eventually evaporate, but it serves a couple of
purposes in the fuel, it keeps any residual glycerin in suspension and of
course any water. Both glycerine and water can thus be burned in the
combustion process without harm.
Methanol is never 100%, there is always a tiny percentage of water with it.
It's the free water that may cause harm to the injectors as the droplets
would turn to steam with explosive force.
Methanol also increases the energy content of the fuel.
From what I have read, I'd rather keep the methanol in the fuel.
Jim Hossack on the list, pointed out that unwashed biodiesel being caustic
may also not support bacterial growth.
In the book "From the fryer to the fuel tank", it's noted that unwashed BD
can be used without harm.
I have been using it for over a year now and will stick with it, just
concerned about the fuel temp as noted earlier.
Bjorn
>From: "recovry4x4" <recovry4x4@bellsouth.net>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Subject: Re: [MV] Unwashed biodiesel concern
>Date: Fri, 5 May 2006 00:32:43 -0400
>
>Hmmm! I wonder what the evaporation rate of methanol is? Seems that most
>alcohols evaporate pretty quickly. I wonder if areating (sp) the fuel will
>cause the methanol to evaproate?
>----- Original Message ----- From: "Bjorn Brandstedt"
><super_deuce@hotmail.com>
>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>Sent: Wednesday, May 03, 2006 9:59 AM
>Subject: Re: [MV] Unwashed biodiesel concern
>
>
>>Fuel dryer additives are not methanol, but ethanol, which has a higher
>>boiling temp.
>>Ethanol can also be used instead of methanol in biodiesel production, but
>>costs more.
>>One other solution is to install a thermal blanket around the tank to keep
>>the temperature under control.
>>
>>Bjorn
>>
>>
>>>From: "Glenn Shaw" <milspectruck@verizon.net>
>>>To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
>>>Subject: Re: [MV] Unwashed biodiesel concern
>>>Date: Wed, 03 May 2006 09:49:35 -0400
>>>
>>>I would think it is just a matter of quantity. With the water dispersals
>>>you are adding a couple of 12 oz cans. Bjorn may be talking about enough
>>>of
>>>a quantity that it all will not remain azeotropically bonded to the water
>>>and begin to come off as significant amounts of Methanol vapor. That
>>>could
>>>pose a problem near the tank vent if someone lit up a ciggy. I would
>>>just
>>>monitor the sit and see, but I would definitely not have any fuel system
>>>venting near any source of ignition to be safe.
>>>
>>>Glenn
>>>MTA
>>>MVPA
>>>
>>>-----Original Message-----
>>>From: Military Vehicles Mailing List [mailto:mil-veh@mil-veh.org] On
>>>Behalf
>>>Of Rick v100
>>>Sent: Wednesday, May 03, 2006 9:14 AM
>>>To: Military Vehicles Mailing List
>>>Subject: Re: [MV] Unwashed biodiesel concern
>>>
>>>
>>>Isn't alochol used in most fuel dryers? So what is the difference between
>>>having the methanol left in and adding fuel dryer?
>>>
>>>--- Bjorn Brandstedt <super_deuce@hotmail.com> wrote:
>>>
>>> > I do have one concern about using unwashed biodiesel
>>> > and that is the fact
>>> > that methanol starts to boil at 148 deg F.
>>> > This could be a factor in a hot climate with the sun
>>> > beaming down on the
>>> > fuel tank.
>>> > I have received a couple of numbers from Kenny in
>>> > Florida and Ken in TX on
>>> > the fuel temp, but those were not maximum or worst
>>> > case conditions.
>>> >
>>> > It could be a fire hazard.
>>> >
>>> > If any of you would care to add to this, I would be
>>> > most appreciative.
>>> > Just measure the fuel temp with the engine running
>>> > (return fuel is hot) and
>>> > report the highest temperature with the sun hitting
>>> > the tank. I suspect 150
>>> > F would not be out of question.
>>> >
>>> > TIA
>>> >
>>> > Bjorn
>>> >
>>> >
>>> >
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>>> >
>>>
>>>
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>>
>>
>>
>>===Mil-Veh is a member-supported mailing list===
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>>
>
>
>
>===Mil-Veh is a member-supported mailing list===
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