Mark writes: > >Could somebody give me some info on how the results (in ml) of the >crude titration that we do for biodiesel making correlate with ffa >content (in percent).
I depends on the molecular weight of the FFA, which of course depends on the type of oil. One gram of NaOH will neutralize about 7 g of oleic acid, which would be a typical FFA for the oils we use. So if your oil titrates at 1 ml using 0.1% NaOH solution, you have 7 g of oleic acid per liter (say 920 g) of oil, or 0.77% FFA. If you had some rancid rapeseed oil, high in free erucic acid (higher molecular weight), each ml of NaOH solution in your titration would be 0.92% FFA. If coconut with free lauric acid (lower mol wt.), 1 ml equals only 0.54% FFA. 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/
