The lubricity of ethanol-gasoline fuel blends
Keywords:Lubricity, wear scar, gasoline, ethanol
In this work the lubricity of several ethanol (hydrated or anhydrous) / gasoline fuel blends was measured by using a conventional HFRR tester. Tests were carried out at 25ºC with no water vapour pressure control, according to the ASTM D6079 standard. According to the results the range of variation of the mean wear scar diameter was small among tested fuels in the range E-20 to E-85, indicating that the addition of ethanol, anhydrous or hydrated, did not impact significantly blend lubricity. The addition of hydrated ethanol (96% v/v) slightly improved blend lubricity in comparison with the addition of anhydrous ethanol. The higher mean wear scar diameters, lower fluid film traces and higher friction coefficients obtained for all tested fuels, in comparison with the typical values for diesel fuels, indicate the necessity of using lubricity additives when gasoline or ethanol / gasoline blends are used in new engine technologies requiring higher pressures in the fuel injection system.
D. Margaroni. “Industrial Lubrication and Tribo logy”. Fuel lubricity. Vol. 50. 1998. pp. 108-118.
S. Safran. Statistical thermodynamics of surfaces, interfaces, and membranes. Westview press. New York. 2003. pp.208-225.
M. Nikanjam, P. T. Henderson. Lubricity of Low Sulfur Diesel Fuels. SAE technical Paper. Warrendale. U.S. N. Giles (editor). 1994. pp. 743-760.
R. H. Barbour, D. J. Rickeard, N. G. Elliott. U nderstanding diesel lubricity, SAE paper 2000-01- 1918. 2000. pp. 134-141.
D. P. Wei, S. Korcek, H. A. Spikes. Comparison of the lubricity of gasoline and diesel. SAE paper 962010. 1996. pp. 62-69.
H. A. Spikes, D. Wei, S. G. Korcek. “The lubricating properties of gasoline fuel”. Proceedings of Fuel Symposium. Munich. 3-5 september 1996. pp.12-19.
D. P. Wei, H. A. Spikes, S. Korcek, “The lubricity of gasoline”. Tribology transactions. Vol. 42. 1999. pp. 813-823.
F. Fusco. D. Katsuki, A. Sinatora. “Wear and corrosion evaluation of electric fuel pumps with ethanol/gasoline blends”. SAE paper 2005-01-2196. 2005. pp. 356-364.
Europ ean norm UNE EN-590: 2004. Standard specifi cation for Automotive fuels. Diesel. Requirements and test methods. 2004.
ASTM D 975: 2004 Standard specifi cation for diesel fuel oils. 2004
J. G. Eleftherakis, M .J. Harrigan, X. Tao. “Development of a benchtop fuel lubricity assesment method”. SAE paper 941915. 1994. pp. 1732-1741.
California Air Resource Board publication. CaRFG. “(California Reformulated Gasoline) performance and compatibility test program”. Californa Air Resources Board. 1996. pp. 23-27.
European norm EN 228: 2008. Standard specifi cation for Automotive fuels –unleaded petrol – Requirements and test methods. 2008.
European norm EN 15376:2007. Standar specifi cation for Automotive fuels – Ethanol as a blending component for petrol - Requirements and test methods. 2007.
Z. Muzíková, M. Pospíšil, G. Šebor. “Volatility and phase stability of petrol blends with ethanol”. Fuel. Vol. 88. 2009. pp. 1351-1356.
M. Lapuerta, M. Contreras, J. R. Agudelo. “The lubricity of etanol-biodiesel-diesel fuel blends”. Energy and Fuels. 2010. 24. 1374-1379.
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