CHARACTERIZATION OF PETROL, ETHANOL AND SPENT ENGINE OIL BLENDS FOR TWO-STROKE SINGLE-CYLINDER SPARK-IGNITION ENGINE

Victor Ogbeide-Igiebor; Idris Idris Ibrahim Ozigis; Lawal Lawal Muhammed Nasir

doi:10.4314/njt.v43i3.9

Authors

V. Ogbeide-Igiebor Department of Mechanical Engineering, Faculty of Engineering, University of Abuja, Nigeria
I. I. Ozigis Department of Mechanical Engineering, Faculty of Engineering, University of Abuja, Nigeria
M. N. Lawal Department of Mechanical Engineering, Faculty of Engineering, University of Abuja, Nigeria

DOI:

https://doi.org/10.4314/njt.v43i3.9

Keywords:

Two-stroke SIE, Multiple fuel-blends, Petrol, Ethanol, Spent engine oil, Research octane number, Motor octane number, Benzene, Volatility, Density, Particle content, Optimum mix-ratio, Stoichiometric combustion , CO, HC and NO_x emissions

Abstract

This research has provided additional information to conduct performance evaluation of petrol, ethanol and spent engine oil using various mix ratio of sample 0 (98%:00:02%)as control, A (89%:09%02%), B (93%:05%:02%) and C (91%:07%:02%) fueled single-cylinder spark-ignition (SI) engine for power generation and other similar services. Specifically, at load of 0.4, 2353, brake power of 0.65, brake mean effective pressure of 254.8 was obtained. However, carbon-dioxide emission was quite appreciable at 0.7 load at 5% ethanol blend which produces 21.5%. Emission characterization shows that emission of CO and HC are eco-friendlier when blended with cassava-ethanol, however, due to higher temperature of combustion as the potency of the spent oil is increased, more are likely to be formed. When the quantity of air supplied and thus, oxygen is completely utilized that is, combustion is stoichiometric, the use of spent oil is advisable for high speed two-stroke engines with fines and other heat dissipation systems modified to handle high temperature, otherwise, operation control systems should be incorporated to restrict the limit of loss of viscosity for the oil to be changed. The presence of lower with fuel blend spent oil and ethanol as well as increase in the amount of emitted with increase in engine load shows the presence of high carbons in the mixture. Hence the use of spent oil and ethanol as blends is on average beneficent to human and vegetation as reported in [25, 29].

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