Kieth > >I have recently read a paper > > > >PURIFICATION OF COLD PRESSED RAPESEED OIL TO USE AS A FUEL > >FOR ADAPTED DIESEL ENGINES > >E. Remmele 1 , B. Widmann 2 > >12th European Conference on Biomass for Energy, Industry and Climate > >Protection, 17-21 June 2002, Amsterdam, The Netherlands > > > >That details the processes used by the 180 or so small scale German oil > >mills for production of rapeseed oil fuel. The paper suggests that they > >cold press and then either use a filter or a sedimentation process > >followed by a safety filter and then the fuel is ready, complying with > >the Weihenstephan standard. > > ... as featured at the excellent VegBurner website at 9 Oil Types and > Filtering: > http://www.vegburner.co.uk/ >
I don't know that I would call it excellent, in need of some revision, but thank you. > > >I guess that the level of production and usage of fuel from these mills > >would point to degumming being unnecessary with rapeseed oil? > > Seems it does contain gum: > > "Gums compose about 2% of solvent-extracted rapeseed oil (Salunkhe > et. al., 1992)." > http://www.wsu.edu/~gmhyde/433_web_pages/433Oil-web-pages/Rapeseed1/Ra > pe&Canola_oils_1.html > > And that its removal is necessary: > > "It has been demonstrated that the use of crude (gum content c. 2%) > or degummed crude (gum content of 1.4%, this study) rapeseed oil > leads to performance problems including filter blockages and engine > coking. Gums are a major precursor of gel formation which becomes > particularly problematic at temperatures below 2 ¡C. These problems > can be ameliorated by using rapeseed oil which has been degummed to > food grade standard (gum content < 0.2 %)." > http://www.regional.org.au/au/gcirc/6/214.htm > Results of engine and vehicle testing of semi-refined rapeseed oil > I have read this report (I've got it linked form my site) yet this information had not sunk in, thanks for pointing this out. Even so as I said the paper I read does not mention that the numerous small scale rapeseed fuel oil mills (many of them operated by farmers) degum their fuel oil, and it does go into some detail about the crude oil treatment. I guess that either this information was omitted or that the Germans find it unnecessary. The information (above) that you posted would suggest gummed oil not being a problem above 2 deg C. I'll try and find more details about the refining processes used in the German mills. Best Darren --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.534 / Virus Database: 329 - Release Date: 31/10/2003 ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/9bTolB/TM ---------------------------------------------------------------------~-> Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html List messages are archived at the Info-Archive at NNYTech: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. 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/
