Just ran into this
Biodiesel Jet Fuels Cleaner, greener jet fuels made from formulas that contain part soybean oil could clean up the air and give added profits to the nation's 400,000 soybean growers. Related Resources ð Biomass Index Now that biodiesel fuel is being used in ground transportation, research efforts at the National Center for Agricultural Utilization Research in Peoria, Illinois, are helping lay the groundwork for new, winterized formulas of jet fuel blended with esters of soybean oil. With winterization processing, biodiesel fuel can be safely blended with jet fuel used in commercial and military aircraft. ARS chemical engineer Robert O. Dunn found that small amounts of methyl soyate (SME)÷esters from fatty acids of soybean oil÷could be blended with jet fuel (JP-8) with little or no effect on aircraft operation, based on established jet fuel specifications. Dunn has developed a three-step winterization process for biodiesel fuel that involves mixing in additives, chilling the fuel, and filtering out solids. In laboratory tests, researchers have produced biodiesel fuels capable of starting engines at temperatures as low as 5¼F, making them comparable to petroleum-based diesel fuels. In laboratory tests, Dunn checked winterized blends having between 10 and 30 percent methyl soyate (SME) by volume to determine their compatibility with JP-8 and tested the fuels under cold temperatures. Using unwinterized biodiesel fuel blends could mean limiting the ability of aircraft to fly at high altitudes, where cold temperatures can cause crystal formation, which blocks fuel filters and plugs fuel lines. "The most promising aspect of this work was finding that winterized SME did not form solid particles when exposed to a range of slightly below zero to ö52¼F in the laboratory," says Dunn. But eventually even winterized SME blends will form solid particles when the temperature is low enough. "Our work will continue to focus on expanding the lower limits of temperature so that winterized, blended biodiesel fuels can function safely in commercial and military aircraft," says Dunn. Biodiesel fuel has been shown to reduce harmful exhaust emissions÷particulate matter, volatile organic compounds, hydrocarbons, smoke, and carbon dioxide. Another plus: Biodiesel is nonflammable, making it relatively safe to store and handle. It's also biodegradable Source: By Linda McGraw, Agricultural Research Service Information Staff. Agricultural Research Magazine. March 2001 - Vol. 49, No. 3. http://greennature.com/article103.html > -----Original Message----- > From: Jack Kenworthy [mailto:[EMAIL PROTECTED] > Sent: 05 August 2003 14:53 > To: biofuel@yahoogroups.com > Subject: Re: [biofuel] ASTM Fuel > > Keith et. al.- > I am using the single stage base process. I make the fuel in roughly 150 > gallon batches - totalling about 300 gallons a week right now. What this > will do for us is to allow us to pursue a Bahamas Development Bank grant > to establish a locally owned and run biodiesel processing facility of > roughly double the size in the nearby settlement. I think we will plan on > putting a business plan together for the Bank sometime in the next three > months to help biofuels claim a good portion of the total diesel market on > Eleuthera (It is quite small if you don't include the marinas - and the > yacht owners are a tough crowd to crack). I'll keep you posted. > > Regarding particular areas that I focused on - I would certainly say the > wash. I know people's opinions vary on this, but I cannot imagine not > washing the fuel. I wash three times always for about 2 days each wash. > It takes a bit of time, but the air pump just runs off of a solar panel > with a small battery bank - and I have the time to wait. I also use 22% > methanol - I haven't played around with this much, so I am not sure how > that volume is affecting my fuel. > > I am very interested in finding out what sort of modification might need > to be done to a jet or turbo prop engine to help it run on biodiesel. I > will look into the link you sent James, and if anyone else has any other > ideas, I'd love to hear them. > > CHeers, > Jack > > James Slayden <[EMAIL PROTECTED]> wrote: > Capstone power generation turbines can run on biodiesel, so I assume that > the mod for jet engines wouldn't be that difficult. > > http://www.microturbine.com/technology/specsheets.asp > > James Slayden > > > On Tue, 5 Aug 2003, Keith Addison wrote: > > > That's GREAT news!!! > > > > Well done! Multiple :-) 's! > > > > Jack, remind me please - which process are you using? And what are > > your plans now you've "made the grade"? > > > > Jet engines... rings a vague bell, but I don't know. Interesting. > > > > All best > > > > Keith > > > > > > >Hey All - just thought I would let you all know that I just received > > >my results from the ASTM tests and we passed all categories. Just > > >another good example of a homebrewer in a remote setting (Bahamas) > > >making spec-grade biofuel! > > > > > >One other question: has anyone ever done any testing for using > > >biodiesel in a jet engine? Jet fuel is so close to diesel fuel, I > > >was wondering if anyone had done the research. > > > > > >Thanks. > > >Jack > > >Jack Kenworthy > > >Sustainable Systems Director > > >The Cape Eleuthera Island School > > >242-359-7625 ph. 954-252-2224 fax > > >www.islandschool.org > > > > > > Yahoo! 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