Thnaks for your comment on chian length. I had taken the comment from a report mentioned below:
http://home.earthlink.net/~galiagante/house-biofuel.html which reportsas follows: III. 3. b. Step Two: Vegetable Oil and Sodium Methoxide Vegetable oil is primarily made of triglycerine with small amounts of assorted other compounds including trace elements, fatty acids and stray proteins that may have slipped through during the extraction process. Virgin vegetable oils can have carbon chains as short 18 points. Waste Oils (such as used cooking oils) can have carbon chains as long as 32 point after repeated heatings and coolings. By comparison, petro diesel has a carbon chain of between 11 and 13 points. The transesterification process "breaks" the triglycerine carbon chains into something that more closely resembles diesel. Breaking triglycerine means adding sodium hydroxide at a ratio of 3.5 grams per liter of pure triglycerine in the presence of a suitable solvent. As pure triglycerine is basically never found, remember that properly testing your oil feedstocks is very important (see Titration Testing, above). >From: "Camillo Holecek" <[EMAIL PROTECTED]> >Reply-To: biofuels-biz@yahoogroups.com >To: <biofuels-biz@yahoogroups.com> >Subject: [biofuels-biz] Indian and Asian BD activities >Date: Mon, 2 Sep 2002 17:38:14 +0200 > >Dear Mr. Rajendra Sharma and all: > >I am very glad and literally happy to learn on this list suddenly about so >many ernest activities and BD interested parties in India! Great! Realy >great! I happend to travel to Mumbai, Pune and Nasik in Jannuary 02 and had >the opportunity to introduce the idea of Biodiesel to some private sector >petro chemists. > >And now I can see all that happening "by itself". Looks like the very >working of "Rtambara Pragya", the divine power of the seasons.... > >Anyway, what I wantes to contibute: >The process of transesterification of a plant oil (used or fresh) does not >involve any change in carbon chain lenght. Unfortunitly. > >We would be very happy to achive that; it would solve all our problems with >the cloud point of BD in cold climates! > >I am aware that it is a common misconcept that the lower viscousidy of BD >compared to plant oil could be from chain lenght managment. These are not >common hydrocarbons! > >Actually the change is in molecular size and complexidy (from triglycerid >to methyl ester), but NOT in the chain lenght of the fatty acid chains >themselves. > >Nevertheless, we are very keen to see some Biodiesel produced in India as >soon as possible! >Good luck! > >Regards, >Camillo Holecek >CEO, Biodiesel Refinery Ltd., Austria > > > >-----UrsprŸngliche Nachricht----- >Von: Steven & Helen Hobbs [mailto:[EMAIL PROTECTED] >Gesendet: Sonntag, 01. September 2002 16:14 >An: biofuels-biz@yahoogroups.com >Betreff: Re: [biofuels-biz] Help! > > >Dear Rajendra >I found it interesting that you mention on esterification that the chain >length >is broken from C18 or more down to a chain length of C11 - C13. >Can such a difference be due to the variety of oil that is selected? The >reason >I ask is that I have been making BD from cold pressed virgin Canola oil, >and I >had a GC fatty acid analysis performed on my BD and the results were; >C16:0 -C18:0-C18:1-C18:2-C18:3-C20:0-C20:1-C22:0 > 3.9 - 4.83 - 80.54- 9.29- 0.00 -0.37 - 0.00 - 1.07 >The GC fatty acid composition dosn't show chain lengths as short as what >you >mention, but 98.56% of chain lengths are C18:2 or shorter. >I would appreciate your comments. >Regards >Steven > >Rajendra Sharma wrote: > > > Kavitha > > obviously your professor is not fully informed. > > Virgin oil and for that matter the waste oil has long carbon chains- 18 >or > > so but on esterification these chains are broken down to 11 - 13, very > > similar to that in diesel. Due to about 11% oxygenates avialble in > > biodiesel( which is defined as mono ethyl or methyl ester ). > > we are doing work on prodcution of biodiesel from non-food plant seeds, >have > > tested it in engines and confirmed the emissoin advantages of biodiesel. > > now I am working on preparing a Indian standard for biodiesel. > > if you are near bombay you can talk to me for more details. I am in >nasik at > > mahindra & mahindra ltd > > cc:Samai Jaiin - can you send me tha national standard for biodiesel >and > > also copy of your paper mentioned below > > rgds > > > > >From: Samai Jaiin <[EMAIL PROTECTED]> > > >Reply-To: biofuels-biz@yahoogroups.com > > >To: biofuels-biz@yahoogroups.com > > >Subject: Re: [biofuels-biz] Help! > > >Date: Sat, 31 Aug 2002 12:46:25 +0100 (BST) > > > > > > >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/ > > _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com ------------------------ Yahoo! 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