Re: vegetable oil for running diesel engines

[Peter Singfield <snkm@btl.net>]

At 09:42 AM 11/24/2002 +0900, Keith Addison wrote:
>Thanks for the cohune info, Peter.
>
>Do you know about this one?
>http://www.hort.purdue.edu/newcrop/duke_energy/Copaifera_langsdorfii.html
>Copaifera langsdorfii
>

No -- and how very interesting indeed!! I am not aware of this tree growing
in this area -- need to find out more. Will search and investigate.

Thanks for a great lead -- a "real" oil tree!!

The Url give a great technical description -- but I need to find some local
names for this tree to identify it.

>I keep trying to find out more about it, no luck so far.

So will I -- we shall compare notes. Certainly -- at those yields --
plantations make economic sense here.

Peter Singfield / Belize


>That the oleoresin called copaiba could be obtained by incising the 
>trunk was first reported in England in 1625, in a work published by 
>Purchas, "...a single tree is said to yield about 40 litres." 
>(Grieve, 1931, reprinted 1974). Quoting nobel-laureate Calvin, Maugh 
>says (1979), "Natives ... drill a 5 centimeter hole into the 1-meter 
>thick trunk and put a bung into it. Every 6 months or so, they remove 
>the bung and collect 15 to 20 liters of the hydrocarbon. Since there 
>are few Rabbit diesels in the jungle, the natives use the hydrocarbon 
>as an emollient and for other nonenergy-related purposes. But tests 
>have shown, he says, that the liquid can be placed directly in the 
>fuel tank of a diesel-powered car."
>
>I keep trying to find out more about it, no luck so far.
>
>I think there are a great many such plants and trees with energy 
>potential, very few seem to have been investigated thoroughly. My 
>choice would always be a crop that local people knew and were used 
>to, even if only as a weed. That some other plant might have higher 
>yields isn't nearly so important as what fits best.
>
>A Paraguayan farmer wrote to me asking for advice on energy crops, 
>and complaining about the local weeds - which turned out to be a 
>species of euphorbia that's also known as the "Petroleum plant", 
>Euphorbia lathyris, which produces "a hydrocarbon substance very much 
>like gasoline".
>
>Best
>
>Keith Addison
>
>

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