Hi Turbo Think you should read Kens post again. Approx 12-14% of the volume of oil will be the amount of methanol used in the reaction. this displaces ABOUT the same volume of glycerine. If your oil is new and clean with low FFA's then if you add 20% of the volume of oil as methoxide you will get back 98% of the volume of oil as biodiesel. 2% of the volume of oil as unreacted oil which will be in suspension in the biod. 12 - 14% of the volume of oil as glycerine. 6 - 8 % of the volume of oil as excess methanol most of which will be disolved in the glycerine because as you found in the archives methanol dissolves more readily in glyc. than in bioD. remember this only applies to the excess methanol after the reaction - the 12-14% methanol which has been changed in the reaction is no longer methanol. You do need to add excess methanol otherwise the reaction will probably not be complete and you will also end up with a lot of unreacted oil. There will also be a small amount of soaps and caustic salts which will be both in the BioD and Glyc. BUT as ken said these figures are very flexible and this is just a rough guide.
make some litre test batches from each new lot of oil and you will find out a lot. do a search for Dr Pepper(pat pend.) on this site http://biodiesel.infopop.net for the easy way to do test batches. ----- Original Message ----- From: "turbodiesel_vw" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Thursday, 7 February 2002 4:18 Subject: [biofuel] Re: What is a "good" BD yield from WVO? > o.k.--fine, > > I'll try and answer my own question: > > According to the archieves glycerine is soluble in methanol. If you > add 20% Methanol of which about 14% is absorbed by the glcerine then > an ideal BD yield should be about 86% volume of WVO used. > > So if your yield is 80% or better your getting "good" BD yield! > > right? > ------------------------ Yahoo! Groups Sponsor ---------------------~--> Get your FREE credit report with a FREE CreditCheck Monitoring Service trial http://us.click.yahoo.com/ACHqaB/bQ8CAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
