383788 Characterization of Glycerol-Diesel Emulsions Fuels

Thursday, November 20, 2014: 12:55 PM
M301 (Marriott Marquis Atlanta)
Scott Eaton, SeaChange Group LLC, Brunswick, ME, George Harakas, Ocean Studies, Maine Maritime Academy, Castine, ME and Richard Kimball, Systems Engineering, Maine Maritime Academy, Castine, ME

Diesel fuel emulsions have demonstrated reductions of unwanted combustion emissions.  Glycerol, a renewable and abundant resource, is an attractive fuel component since it may lower energy costs and reduce unwanted engine emissions.  In this presentation, various glycerol-diesel emulsions are prepared using an ultrasonic processing technique and resultant fuel properties are presented.  The fuels typically have higher viscosity (5-20 cps) and density (0.9-0.98 g/mL) and lower fuel energy density (36-42 MJ/kg).  The high glycerol oxygen content (52 wt.%) reduces stoichiometric A/F ratio and flame temperatures.  Surface analytical techniques and long-term stability evaluations are used to identify optimal surfactant composition for extended shelf-life.  A narrow droplet size distribution with mean of approximately 3.3 microns is achieved, which is found to be broadened with the addition of water in the glycerol up to 50/50 vol.%.  Glycerol-diesel emulsions prepared at 10 and 20 vol.% glycerol-phase resul in reduced NOx and PM emissions of 5-15% and 25-50%, respectively in a naturally-asiprated signle-cylinder diesel engine.  Thermal efficiency improvements are observed at high loads .

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See more of this Session: Alternative Fuels and Enabling Technologies IV
See more of this Group/Topical: Fuels and Petrochemicals Division