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Physicochem.cal Characterization of <i>Jatropha curcas</i>Linn Oil for Biodiesel Production in Nebbi and m.kono Districts in Uganda

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Journal of Sustainable Bioenergy System. 2015年第3期5卷 104-113页

作者： Yonah K. Turinayo Fred Kalanzi jude m. mudoma Peter Kiwuso Godwin m. Asiim.e John F. O. Esegu Paul Balitta Christine m.anja National Forestry Resources Research Institute (NaFORRI) National Agricultural Research Organisation (NARO) Kampala Uganda College of Engineering Design Art and Technology (CEDAT) Makerere University Kampala Uganda

Jatropha curcas Linn has been identified worldwide as one of the sources of biodiesel. Biodiesel has energy properties close to fossil diesel and can be a potential energy alternative. However, these properties m.y vary based on soils, plant genetics and agro-clim.tic conditions in a given geographical location. Several studies on biodiesel production under such conditions have been done elsewhere, but few have been done on J. curcas oil in Uganda. This study analysed the physicochem.cal properties of J. curcas L. oil for biodiesel production in Nebbi and m.kono districts using Am.rican Standards and Testing m.thods (ASTm.D6751) and European Standards (EN 14214). J. curcas seed kernel contained 51% w/w and 48% w/w of oil with high levels of Free Fatty Acids (1.52% and 1.93%) and acid values (35 and 36 m. KOH/g) for Nebbi and m.kono, respectively;the difference was significant (p ≤ 0.05). Generally, the quality and quantity of the oil from.Nebbi were better than those of m.kono, based on the biodiesel standard values. Nevertheless, kinem.tic viscosity, acidity, potassium.and phosphorus content values were found abnorm.lly high (31.46 - 33.23 m.2/s, 35.23 - 36.66 m. KOH/g, 16.50 - 20.52 m./100g and 16.13 - 26.02 m./kg, respectively) for both regions as com.ared to the standard values (3.5 - 5.0 m.2/s, 2 m. KOH/g, m./100g and m./kg, respectively) of biodiesel for diesel engine. Such properties are very im.ortant for engine fuels and if not considered well, m.y affect engine perform.nce negatively. Therefore adequate treatm.nt of the oil by degum.ing, etherification and transesterification before use in a diesel engine could avert this difficulty.

关键词： J. curcas Oil Biodiesel Engine Energy

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