Re: [biofuel] Question about yield
Hello Stan >Hi > >I am interested in making biodiesel from waste oil and have a couple >questions: > >1) Methanol seems to be the most expensive ingredient in the process. I >have read in some places that 20% by volume of methanol is required, in >other places I have read 25% is required. How little can I get away with? Don't skimp on the methanol, but don't waste any either! You have to use an excess to drive the process towards completion, but the excess is recoverable (mostly). All is explained here: http://journeytoforever.org/biodiesel_meth.html How much methanol? >2) What is the overall yield of the process. If I start with a 100 >litres of waste oil and I add 20 litres of methanol how many litres of >fuel do I end up with? About 100 litres, if you do everything perfectly and it's pretty good oil. The more "used" the oil, the higher the levels of free fatty acids and the lower the conversion rate, unless you use the acid-base method: http://journeytoforever.org/biodiesel_aleksnew.html Foolproof biodiesel process That method will give you high production even with high FFA levels (up to a point). Otherwise, using a single-stage process with average used oil, you should get more than 90%. Start with single-stage and move on to two-stage processes if you like when you've gained some experience. Lots of info here: http://journeytoforever.org/biodiesel_make.html Make your own biodiesel Best Keith >Stan Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ 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/
Re: [biofuel] Question about yield
Stan writes: > >1) Methanol seems to be the most expensive ingredient in the process. I >have read in some places that 20% by volume of methanol is required, in >other places I have read 25% is required. How little can I get away with? Experiments by Neutral (infopop forum) indicate that viscosity of the fuel (a measure of conversion extent) continues to fall up to 30% methanol. If you use less, you just end up with more mono- and diglycerides in your fuel, and a higher viscosity. Whether that matters probably depends on your climate, your engine, your source of waste oil, and a lot of other unknowns. >2) What is the overall yield of the process. If I start with a 100 >litres of waste oil and I add 20 litres of methanol how many litres of >fuel do I end up with? About 100, provided you don't lose any in emulsion, precipitated tallow esters, etc. Again, many variables in this question. -K Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ 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/
[biofuel] Question about yield
Hi I am interested in making biodiesel from waste oil and have a couple questions: 1) Methanol seems to be the most expensive ingredient in the process. I have read in some places that 20% by volume of methanol is required, in other places I have read 25% is required. How little can I get away with? 2) What is the overall yield of the process. If I start with a 100 litres of waste oil and I add 20 litres of methanol how many litres of fuel do I end up with? Stan Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ 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/
