Padraig, Thanks for the information.
We have a locomotive in Thailand running 300 kilometres a day on a 50:50 blend of biodiesel:petrodiesel. The biodiesel in primarily methyl stearate because it is made from the waxy solid stearin/palmitin that separates out of the olein in the palm oil. We've even had it analysed by gel chromatography. In 1983, I had a student here in New Zealand making biodiesel from tallow (which is also primarily stearin). [Hey Keith! Perhaps I am the real "Father of Biodiesel in New Zealand"! Now what I need is a second-rate journalist to do my PR . . . . ] If there are any "drying oils" present in the oil (such as linseed, fish or flax-oil), oxidation of the relevant unsaturated fatty acids can be expected to form a polymeric film on the biodiesel/air interface. It reforms every time the surface is broken until it is all reacted with the air. I wonder if that could be an alternative explanation? Wendell, what do you think? Could there be any unreacted and unsaturated FFA present? Padraig! Glad to hear you got the paper OK! E-mail from southern Thailand was just slightly less reliable than it is from here in New Zealand. Regards Michael Allen 11/12/02 01:21:31, "goat industries" <[EMAIL PROTECTED]> wrote: >Michael Allen's question: What makes you so sure it is methyl stearate? Do >you have a reference for this perhaps? > >This conclusion is one of my own drawn through my own experiences with >making biodiesel from waste oil. There is no research reference that I know >of. What do you think it is? > >By the way, did you ever receive that paper I sent you entitled "Kinetics of >Palm Oil >Transesterification In a Batch Reactor" by D. Darnoko & Munir Cheryan ? > >Yes thanks! I did! > > > > > >Biofuels at Journey to Forever >http://journeytoforever.org/biofuel.html >Biofuel at WebConX >http://webconx.green-trust.org/2000/biofuel/biofuel.htm >List messages are archived at the Info-Archive at NNYTech: >http://archive.nnytech.net/ >To unsubscribe from this group, send an email to: >[EMAIL PROTECTED] > > > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > > Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://webconx.green-trust.org/2000/biofuel/biofuel.htm List messages are archived at the Info-Archive at NNYTech: http://archive.nnytech.net/ To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
