Alrashidi, Batel (2018) The effect of octane number and energy content of the fuel containing ethanol as additive on combustion properties, engine performance and emission. [USQ Project]
Abstract
The need to minimise the level of greenhouse gas emissions generated by the combustion of fossil fuel and the continued increase in the price of purely petroleum-based products such as gasoline and diesel have necessitated research and adoption of alternative fuels. Alcohol, biodiesel and vegetable oils have been identified as viable alternative fuel options. The use of Ethanol-Gasoline blends leads to lesser greenhouse gas emissions while at the same improving certain aspects of engine performance, for example increased torque and engine power.
This project evaluates the performance of a spark ignition engine in relation to gas emissions and cylinder pressure developed. Experimental studies were carried out using a Gunt single cylinder engine with a compression of 8:1. Three fuels were evaluated in the experiments carried out; Petrol 91, Petrol 98 and E10 (10% Ethanol, 90% Gasoline) fuel blend. Three engines speeds were used for this study; the engine was operated at 1200 RPM, 1400 RPM and 1600 RPM.
The results obtained from the experiments showed that the addition of ethanol into gasoline led to a decrease in the level of CO, HC and NOx emissions. However, the level of CO2 was found to increase. This was attributed to improved combustion as a result of increased oxygen in the combustion chamber. The cylinder pressure was found to be higher with both the E10 fuel blend and petrol 98 as compared to 91. The improvement was associated with the improved octane number of the E10 fuel blend due to ethanol while petrol 98 contains additives such as TEL (Tetra Ethyl Lead), aromatics such as benzene and toluene, and MTBE (Methyl Tertiary Butyl Ether) which improve its octane rating (Ali & Hamid, 2010).
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| Item Type: | USQ Project |
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| Item Status: | Live Archive |
| Faculty/School / Institute/Centre: | Historic - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 Jul 2013 - 31 Dec 2021) |
| Supervisors: | AL-lwayzy, Saddam |
| Qualification: | Bachelor of Engineering (Mechanical) |
| Date Deposited: | 06 Sep 2022 01:33 |
| Last Modified: | 27 Jun 2023 04:39 |
| Uncontrolled Keywords: | octane; fuel; ethanol; engine performance; emission |
| URI: | https://sear.unisq.edu.au/id/eprint/40782 |
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