Blending Octane Number of Ethanol in HCCI, SI and CI Combustion Modes
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Mechanical Engineering Program
Clean Combustion Research Center
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AbstractThe effect of ethanol blended with three FACE (Fuels for Advanced Combustion Engines) gasolines, I, J and A corresponding to RON 70.3, 71.8 and 83.5, respectively, were compared to PRF70 and PRF84 with the same ethanol concentrations, these being 2%, 5%, 10%, 15% and 20% by volume. A Cooperative Fuel Research (CFR) engine was used to understand the blending effect of ethanol with FACE gasolines and PRFs in spark-ignited and homogeneous charge compression ignited mode. Blending octane numbers (BON) were obtained for both the modes. All the fuels were also tested in an ignition quality tester to obtain Blending Derived Cetane numbers (BDCN). It is shown that fuel composition and octane number are important characteristics of all the base fuels that have a significant impact on octane increase with ethanol. The dependency of octane number for the base fuel on the blending octane number depended on the combustion mode operated. The aromatic composition in the base fuel, effects blending octane number of the mixture, for fuels with higher aromatic content lower blending octane numbers were observed for ethanol concentration.
CitationWaqas M, Naser N, Sarathy M, Morganti K, Al-Qurashi K, et al. (2016) Blending Octane Number of Ethanol in HCCI, SI and CI Combustion Modes. SAE International Journal of Fuels and Lubricants 9. Available: http://dx.doi.org/10.4271/2016-01-2298.
SponsorsThe authors would like to thank Clean Combustion Research Lab for providing the engine experiment facilities. The published paper was supported by competitive research funding from King Abdullah University of Science and Technology (KAUST) and funds from Saudi Aramco under the FUELCOM program.