It's a bit difficult to say that acid/base catalysis "falls down," whether it be the ambient procedure as presented by Aleks Kac or a HTP industrial procedure.
Most of what industry achieves under high pressure and temperature can be achieved at STP by conducting the reaction over prolonged periods, at moderate temperature and in several stages when necessary. To date we have experienced repeated success with STP esterification, simply by prolonging the esterification period to 36-48 hours, generating a complete transesterification reaction on 3.5% FFA feedstock with but 1.5 grams of KOH per liter of oil over a 36 hour period. Whether a repeat cycle is used on the esterification side or not, it is necessary to separate the feedstock from any layers that formed during the esterification prior to conducting the repeat cycle or the base stage. Todd Swearingen ----- Original Message ----- From: goat industries <[EMAIL PROTECTED]> To: <biofuels-biz@yahoogroups.com> Sent: Monday, August 19, 2002 4:19 PM Subject: [biofuels-biz] hi ffa feed stocks > Check out work done by Canakci and Van Gerpen. I'm trying out their ideas, > but finding it difficult to get good results. Also, an acid value of 1mg > KOH/g = 0.5 % FFA. They identiified water formation in the acid stage as the > inhibiting part of the reaction, which is where Alek's 'foolproof' method > falls down (apparently). > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> > 4 DVDs Free +s&p Join Now > http://us.click.yahoo.com/pt6YBB/NXiEAA/Ey.GAA/9bTolB/TM > --------------------------------------------------------------- ------~-> > > Biofuels at Journey to Forever > http://journeytoforever.org/biofuel.html > Biofuel at WebConX > http://www.webconx.dns2go.com/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/ > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> 4 DVDs Free +s&p Join Now http://us.click.yahoo.com/pt6YBB/NXiEAA/Ey.GAA/9bTolB/TM ---------------------------------------------------------------------~-> Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://www.webconx.dns2go.com/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/
