Document Type : Research Paper
Agricultural Sciences and Natural Resources University of Khuzestan . Department of Farm machinery
Department of Biosystems Engineering, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
Department of Agricultural Machinery and Mechanization Engineering, Ramin Agriculture & Natural Resources university Of Khuzestan, Mollasani, Iran
In this research work, the performance and the exhaust emissions of a CI engine operating on diesel-biodiesel- ethanol blended fuels have been investigated. The main purpose of this study is aimed towards reducing various emissions fueled with those new blended fuel. Conventional transesterfication reaction was carried out to produce biodiesel from Jatropha oil. One cylinder, four-stroke CI engine was powered by green blended fuels at various engine speeds. Response surface methodology (RSM) has been exploited to analyze the performance and exhaust emission parameters of a diesel engine in terms of fuel blends and engine speed. According to the results obtained, an engine speed of 2657 rpm, a concentration of biodiesel of 10.26%, and ethanol ratio of 2.21% were found to be optimal values. Experimental obtained results illustrated the fact that adding ethanol- biodiesel to pure diesel fuel increased performance of diesel engine including power and torque output. The result also showed that CO2 emission increased 9.6 % while CO, NOX, HC emission in a biodiesel-ethanol-diesel fuel decrease 1.33%, 5% and 26.1 % respectively compared to pure diesel fuel. Specific fuel consumption of new blended fuel was decreased 6.9 % compared to the pure diesel fuel.