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Energies 2015, 8(12), 13985-13995; doi:10.3390/en81212409

Combustion of Microalgae Oil and Ethanol Blended with Diesel Fuel

National Centre for Engineering in Agriculture (NCEA), University of Southern Queensland, Toowoomba, QLD 4350, Australia
School of Mechanical and Electrical Engineering, Faculty of Health, Engineering and Sciences (HES), University of Southern Queensland, Toowoomba, QLD 4350, Australia
Author to whom correspondence should be addressed.
Academic Editor: Thomas E. Amidon
Received: 12 October 2015 / Revised: 2 December 2015 / Accepted: 7 December 2015 / Published: 10 December 2015
(This article belongs to the Special Issue Energy for Agriculture)
View Full-Text   |   Download PDF [2875 KB, uploaded 10 December 2015]   |  


Using renewable oxygenated fuels such as ethanol is a proposed method to reduce diesel engine emission. Ethanol has lower density, viscosity, cetane number and calorific value than petroleum diesel (PD). Microalgae oil is renewable, environmentally friendly and has the potential to replace PD. In this paper, microalgae oil (10%) and ethanol (10%) have been mixed and added to (80%) diesel fuel as a renewable source of oxygenated fuel. The mixture of microalgae oil, ethanol and petroleum diesel (MOE20%) has been found to be homogenous and stable without using surfactant. The presence of microalgae oil improved the ethanol fuel demerits such as low density and viscosity. The transesterification process was not required for oil viscosity reduction due to the presence of ethanol. The MOE20% fuel has been tested in a variable compression ratio diesel engine at different speed. The engine test results with MOE20% showed a very comparable engine performance of in-cylinder pressure, brake power, torque and brake specific fuel consumption (BSFC) to that of PD. The NOx emission and HC have been improved while CO and CO2 were found to be lower than those from PD at low engine speed. View Full-Text
Keywords: microalgae oil; ethanol; diesel engine; performance; exhaust gas emission microalgae oil; ethanol; diesel engine; performance; exhaust gas emission

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Al-lwayzy, S.H.; Yusaf, T. Combustion of Microalgae Oil and Ethanol Blended with Diesel Fuel. Energies 2015, 8, 13985-13995.

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