Well..... there are things called biodiesel quality standards, be it ASTM, CEN, DIN, our little national ONORM, whatever....
They are supposed to define the method/s of analysis AND the criteria to determine the quality of Bio-diesel. Many (like me) belive that some of this standards are clearly "overkills" and too meticolous (?spelling?) and too strict in some places or limiting to the use of only one specific feedstock (i.e. rapeseed in Europe) The completness of transesterification is determined by the analysis of remaining mono-, di- and triglycerid left in the product. Period. The only sensible two ways to determin are "thin film chromatography" or "gas chromatography". 100% mutton fat: Yes, we do offer technology for that feedstock. But sorry, nothing for DIYS IMHO. Cloud point IS THE NUMBER ONE problem we all have with the cheap feedstocks.... though. Bye for now, Camillo -----UrsprŸngliche Nachricht----- Von: Steven Hobbs [mailto:[EMAIL PROTECTED] Gesendet: Montag, 17. Juni 2002 23:48 An: biofuels-biz@yahoogroups.com Betreff: Re: [biofuels-biz] raw or refined feedstock ? G'day Camillo, Thanks for the comments but can I ask the question.....by what method/s of analysis do you determine the quality of Bio-diesel? I had a hinch that Glycerine would've been a "specific nuber" before its removal, and so a fatty acid analysis would've indicated the "completeness" of a reaction? It is good to know that in European systems you do in fact use raw feedstock. Just to throw another feedstock into the ball park...100%.mutton fat. I think someone on another thread mentioned something about the smell of "kitten vomit"....yes...fairly nasty smelling stuff....but produced the best looking fuel I've seen. Only problem...has a cloud point of about 16 degrees! Is it possible to alter the cloud point using surfactants? Have you done any work with regards to the use of tallows Camillo? I'd be interested to hear. Regards Steven Camillo Holecek wrote: > If it helps to clarify, here are my two (EURO) cent: > > ALL commercial BD produced in Europe is made from raw oil, nobody > bothers to refine (if they can). > > The fatty acid composition you mention has little to do with "quality". > It depends only on the feedstock AND GOES UNCHANGED THROUGH > TRANSESTERIFICATION !!! Therefore it does not say anything on the > "quality" of a biodiesel production. > > Camillo Holecek > Biodiesel Raffinerie GmbH, > Austria > > -----UrsprŸngliche Nachricht----- > Von: Steven Hobbs [mailto:[EMAIL PROTECTED] > Gesendet: Montag, 17. Juni 2002 15:26 > An: biofuels-biz@yahoogroups.com > Betreff: Re: [biofuels-biz] Re: genetic engineering > > G'day Keith, > It's Steve Hobbs here. I have only two pieces of reference for my work. > > 1 - My humble 18 year old Nissan ute that has now travelled 7000 kms on > a 40% > cold pressed BD & dino diesel mix and appears in all respects to be > travelling fine (perhaps even better that fine, engine rattle has > substantially reduced, cold starts improved, reduced "smoke", etc..the > ute is > due to have injectors removed and inspected by an impartial party) > > 2 - I've had a sample of coldpressed BD analysised for fatty acid > composition, which I guess would give an idea of the quality of the fuel > by > what fatty acids are and aren't present in my fuel. > If you could Keith, I'd be interested to compare the fatty acid > composition > of my farm made cold pressed BD to commercially produced BD to see how > the > quality stacks up. > So, here is the analysis > > C16:0 C18:0 C18:1 C18:2 C18:3 C20:0 C20:1 C22:0 > 3.90 4.83 80.54 9.29 0.00 0.37 0.00 > 1.07 > > If you could provide me with a commentary on the quality of my fuel, it > would > be appreciated. > Regards > > Steven > > >snip, snip, snip,etc > > Keith Addison wrote: > > > >When compared with the costs of > > >refining vegetable oils by degumming, neutralisation, bleaching etc., > > >the cost of transesterifying raw oils is not; or should not be; > > >excessive. Steve Hobbs has shown that the transesterification (with > > >washing)of raw oil effectivelty removes the contaminants. > > > > I've seen various conflicting statements about that. Do you have a > > reference for Steve Hobbs's work? > > > > Best wishes > > > > Keith > > > > > > > Biofuels at Journey to Forever > http://journeytoforever.org/biofuel.html > Biofuel at WebConX > http://www.webconx.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/ Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://www.webconx.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 ---------------------~--> Free $5 Love Reading Risk Free! http://us.click.yahoo.com/3PCXaC/PfREAA/Ey.GAA/9bTolB/TM ---------------------------------------------------------------------~-> Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://www.webconx.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/
