Submitted to: American Society of Agricultural Engineers Meetings Papers
Publication Type: Abstract Only
Publication Acceptance Date: July 12, 2000
Publication Date: July 12, 2000
Citation: DUNN, R.O. BIOJET: AN ALTERNATIVE JET FUEL FORMULATED WITH METHYL SOYATE (BIODIESEL). AMERICAN SOCIETY OF AGRICULTURAL ENGINEERS MEETINGS PAPERS. 2000. Technical Abstract: Air quality standards set forth by the Clean Air Act and its amendments have established guidelines for reducing the impact of harmful emissions from commercial and military aviation. Biodiesel, defined as the mono- alkyl esters of fatty acids derived from vegetable oil or animal fat, has demonstrated, in applications as extender for compression ignition engines, a number of promising characteristics, including reduction of harmful exhaust emissions. This work examines the feasibility of blending "methyl soyate" (SME) in vol. fracs. 0.10-0.30 with jet fuels JP-8 and JP-8+100. Testing of cold flow properties indicated that for blends with as little as 0.10 vol. frac. SME, operation of aircraft at altitudes where ambient temperature is below -30 deg C may not be possible. Blending with additized SME decreased this limit by 10 deg C while blending with winterized SME decreased to -47 deg C, a value that places the blend within the standard fuel specification for JP-8. Following an exposure time of 28 d, Karl Fischer moisture contents of 0.10 vol. frac. SME-blends were very small, indicating that water penetration will not be a problem. Although fatty derivatives such as biodiesel will undergo oxidative degradation more readily than jet fuels, careful production, transport, and storage of BioJet blends should not present a significant problem.