期刊名称：Iranica Journal of Energy and Environment (IJEE)
印刷版ISSN：2079-2115
电子版ISSN：2079-2123
出版年度：2010
期号：3132
页码：211-221
出版社：Noshirvani University of TEchnology
摘要：History has seen fuel innovations being driven majorly by transportation needs rather than the overall need to revolutionize the energy needs of the society. Biofuels such as biodiesel and bioethanol are now receiving the impetus required for becoming a fuel source for the future. One of the ways to reduce the dependence on fossil diesel is the blending of bioethanol with conventional diesel. However, an emulsifier or a co-solvent is required to stabilize the blend. The ricebran oil biodiesel offers an alternative application as an emulsifier for diesel-ethanol blends to form diesel-biodiesel-ethanol blends. In the present study the rice bran oil biodiesel was used in different ways such as pure biodiesel, blending with diesel and diesel- ethanol blends. The performance and emission characteristics of a direct injection (DI) diesel engine when fuelled with conventional diesel fuel, pure biodiesel, a blend of diesel and biodiesel and three blends of diesel-biodiesel-ethanol were studied over the entire range of load on the engine. The experimental results showed that the highest brake thermal efficiency was observed with 30% ethanol in diesel-biodiesel-ethanol blends. The exhaust gas temperature and sound reduced with the increase of ethanol percentage in diesel-biodiesel-ethanol blends. The Carbon monoxide, smoke, exhaust gas temperature and sound reduced with the increase of ethanol percentage in diesel-biodiesel-ethanol blends. The minimum values of Carbon monoxides, smoke, exhaust gas temperature and sound intensity were observed with the blend BE30 and were respectively 41.23%, 14.5%, 0.57% and 11.53% lower than that of the diesel fuel. The Oxides of nitrogen and carbon dioxide emissions increased with the increased percentage of ethanol in diesel-biodiesel-ethanol blends. The hydrocarbon emissions increased with ethanol but lower than that of the diesel fuel by a maximum of 35.35% with 10% ethanol in diesel-biodiesel-ethanol blend. The blending of 20% biodiesel into diesel-ethanol blends allowed higher percentage (30%) of ethanol mixing with diesel, increased the brake thermal efficiency and reduced the carbon monoxide, sound, hydrocarbons and smoke than that of the diesel fuel. So the rice bran oil biodiesel can be used as an emulsifier to mix higher percentage of ethanol with fossil diesel to improve the performance and reduce the emissions of a diesel engine.
