On the Ignition Delay of Jojoba Bio-Gasoline Blended with Basic Gasoline as an Octane Booster 04-13-03-0013
This also appears in
SAE International Journal of Fuels and Lubricants-V129-4EJ
Synthesizing a higher antiknock quality fuel is required to increase the thermal efficiency of spark-ignition engines. Since the octane number (ON) of pure Jojoba Bio-Gasoline (JBG) is significantly in excess of one hundred, it can thus be used as an octane booster. In this work, the influence of blending different percentages of JBG with petroleum gasoline (octane number 80) on the ON was investigated. Then the results of such investigation were employed to produce new gasolines with ONs of 92, 95, and 98. The ignition delays of such new gasolines were measured and compared with those of basic gasolines. In order to perform the experiments, a shock tube was designed, manufactured, and fully instrumented for ignition delay measurements. The test variables included the type of fuel, equivalence ratio (Φ), ignition temperature (Tig), and ignition pressure (Pig). It was found that the new boosted gasolines exhibited higher ignition delays by about 40% compared to that of basic gasolines. Also the ignition delay for the new gasoline could be reduced considerably by increasing the ignition temperatures and pressures. Moreover, empirical correlations were developed, and the calculated data were found to be in good agreement with the experimental data. Arrhenius plots were made and the activation energy of boosted gasoline was found to be higher than that of basic gasoline by 9.1%. The new bio-derived octane-boosted gasoline improves the combustion characteristics when compared to basic gasoline and thus can be used for future high compression ratio/high thermal efficiency engines.
Citation: Radwan, M., Abu-Elyazeed, O., Makar, F., and Attai, Y., "On the Ignition Delay of Jojoba Bio-Gasoline Blended with Basic Gasoline as an Octane Booster," SAE Int. J. Fuels Lubr. 13(3):207-222, 2020, https://doi.org/10.4271/04-13-03-0013. Download Citation
Author(s):
M.S. Radwan, O.S. Abu-Elyazeed, F.A.F. Makar, Youssef Ahmed Attai
Affiliated:
Helwan University, Egypt
Pages: 16
ISSN:
1946-3952
e-ISSN:
1946-3960
Related Topics:
Combustion and combustion processes
Spark ignition engines
Gasoline
Knock
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