[TheForge] coal or charcoal

[Peter Hirst]

Mmmmmmm . . . I don'y think its as simple as a mechanical filtering process. 
If that were the only problem, fresh oil would constantly dissolve the 
heavier compounds as it flowed through the wick, particularly with the heat 
of the burner.  In a center draft lamp, the paraffin compounds seem to 
undergo a chemical change as well that is not amenable to physical 
dissolution.  I havce tried soakng a clogged wick in kero, but the hardest 
part -- right up near the top of the burner -- still had to be trimmed away. 
It was like a very hard wax or plastic.  I believe copper can actually 
catalyse a polymerization of  certain of the heavier hydrocarbons.  I have 
not determined whether this happens with vegetable oil, but I will know in a 
few days.  We are undertaking a major tool derusting project over the next 
couple of weeks.  Veggie fuel comes right after that.  Then on to biomass 
pyrolization and gasification.

I'll post progress here regularly.  Just got 5 gallons of Evaporust 
delivered and can't wait to get get some ferricoxide into it.



----- Original Message ----- 
From: "David Childress" <trollkeep at gmail.com>
To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Monday, June 16, 2008 12:18 AM
Subject: Re: [TheForge] coal or charcoal


> Peter,
>
> When I work in the food oil processing plant they just chilled the oil
> and strained it.  Of course what they wanted is mostly what
> solidified.  But if you chill the oil to a lower temp than it will see
> in use every thing that might gel will have and can be removed.  Sound
> like it should do what you need.
>
> David Childress
>
> On 6/12/08, Peter Hirst <saltydog335 at aol.com> wrote:
>> Dave:  I'm not looking at biodiesel yet:  the process is too complex,
>> although I am fairly sure it would work.  More precisely, I have looked 
>> at
>> it and determined that its too much to take on for the volume I need: 
>> couple
>> gallons a week
>>
>> I am looking at filtered waste veggie oil -- what the Greasecar  runs 
>> on --
>> first,  I just need to determine whether the heavy stuff in wvo will tend 
>> to
>> polymerize , or just plain thicken like like paraffin oil, which is what
>> blocks tubular wicks in center draft lamps.
>>
>> Keziah
>> ----- Original Message ----- From: "David Childress" 
>> <trollkeep at gmail.com>
>> To: "Blacksmithing List Sponsored by ABANA" <theforge at mailman.qth.net>
>> Sent: Thursday, June 12, 2008 1:01 PM
>> Subject: Re: [TheForge] coal or charcoal
>>
>>
>>
>> > Peter sounds like what you need if the process for making biodeaeil
>> > from used cooking oil.  This is on my list of thing to do but it has
>> > not made the top yet.
>> >
>> > David Childress
>> >
>> > On 6/12/08, Peter Hirst <saltydog335 at aol.com> wrote:
>> >
>> > > Andrew wrote:
>> > >
>> > > "D00d, ANY oil will work in a wicked lamp"
>> > >
>> > > Not exactly.  In my historic shop, I want to use Aladdin mantle 
>> > > lamps --
>> > > because they produce real light, about 60 watt equivalent.  I can 
>> > > tell
>> you
>> > > from experience that they and other center draft lamps will clog if 
>> > > the
>> > > right fuel is not used.  I worked as the lamp guy in an old school
>> general
>> > > store for a year, and saw any number of Alladins, Rayos and similar 
>> > > with
>> > > wicks that looked like they had been dipped in epoxy.  For technical
>> reasons
>> > > that I can explain if you like, the denser, heavier compounds in 
>> > > certain
>> > > fuels build up in these wicks and eventually prevent the capillary
>> action
>> > > that they rely on from drawing any more oil.  Alladin speciies not 
>> > > using
>> > > "smokeless, odorless" lamp oil, for example, because of its paraffin
>> > > content, recommending only kerosene.  Which is in fact smokelss and
>> odorless
>> > > in a properly tuned center draft lamp.  I am currently working on
>> > > formulation of a recycled veggie based fuel that will not clog a 
>> > > center
>> > > draft wick.  I'll let you know how it turns out. So far I can tell 
>> > > you,
>> it
>> > > has to be mechanically filtered pretty fine.
>> > >
>> > >
>> > > Keziah
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