[Stoves] Vegetable oil or biodiesel?

[Crispin Pemberton-Pigott]

Dear Richard

The caustic soda is disintegrated in the process of being used. It is not
left over in the way that a catalyst is. Soap is 'full of caustic soda' and
may be pH neutral.

Poor man's diesel will have a lot of different chain lengths, basically. The
snipping is accidental so the biodiesel chop everything up and distil /
filter the fractions they want and chuck the rest.

In answer to an earlier question about timing, the treatment is heat the raw
material to about 80 C for a few hours with some caustic soda mixed into it.
It can be done in batches.

The 1-lung Lister (Model 6-1) gives 6 HP at 650 RPM and can burn some pretty
rotten stuff. It probably needs more filtering than actual care in
preparation (to protect the injector pump).

There was a 500 RPM engine developed at ITDG that would run on just about
anything including such strange liquids and even coal dust!

For those confused by the 8 HP Lister/copy, it is the same engine running at
850 RPM with heavier flywheels. One HP per 100 RPM after the first 50. I
have successfully run one at under 150 RPM! Heh heh.

Regards
Crispin

 

Darren , 

Yes ( on the heatin and filtering of used veggie oil), but..

Beneath that general understanding it gets a lot more complicated.Heat and
filtration works in a 1985 mercedes. but is really problematic in the newer
tdi's  .. someone mentions use of caustic to reduce the free fatty acid
content..   a poor mans biodiesel or ?  How is it pllied and removed or do
you remove it?

Point is , the heat of course can come from the radiator with a
line-within-line,  or a wrapped line system but that does not reduce the
free fatty acid content --and the issue being the acid which pits the
injectors and can rot out ordinary rubber hoses. 

 

 We will be seeking out the slower running, near bulletproof,  single lung
Lister type thumper  for the conversion: Its relatively easy to the
conversion: The question is; what is happening 6 months down the road ..We
need to crack that nut before recommending it to our friends up in the
usambaras and we are going to be there in one weeks time- 

 

Anyone out there with experience on that tissue ?

 

Richard  Stanley

 

 

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