Abstract: The relative abundance of some Nigerian seed oils coupled with the little knowledge of their biodiesel usage prompted the need for this research. Biodiesel production is a very modern and technological area for researchers due to the relevance that it is winning everyday because of the increase in the petroleum price and the environmental advantages. In this work, studies were carried out to investigate the fuel properties of Cyperus esculentus, Colocynthus vulgaris, Sesamum indicum ethylesters and their corresponding ethyl ester blends. Ethylesters of these oils were prepared by H2SO4 catalysed transesterification reaction between the oils and ethanol. The fuel properties such as kinematic viscosity, flash points, pour point and water crackle were determined. GC-MS was used to determine the fatty acid profile of the transesterified oils. The fuel properties correlated very well with the fatty acid compositions. The results showed that the oils were rich in saturated fatty acids (66.67%), appreciable value of monounsaturated fatty acids (33.33%) and little percent (33.33%) polyunsaturated fatty acids and absence of polyunsaturated fatty acids in Cyperus esculentus and Sesamum indicum esters. The fatty acid chain lengths that were predominant in Cyperus esculentus, Colocynthus vulgaris, Sesamum indicum were C16, C18 and C20. The fuel properties of Colocynthus vulgaris, Cyperus esculentus and Sesamum indicum biodiesel blends were better when compared to the oil and petrodiesel in terms of flash points, viscosity and pour points, hence the optimum engine performance of both oil and petrodiesel could be improved by use of these biodiesel feedstock.Abstract: The relative abundance of some Nigerian seed oils coupled with the little knowledge of their biodiesel usage prompted the need for this research. Biodiesel production is a very modern and technological area for researchers due to the relevance that it is winning everyday because of the increase in the petroleum price and the environmental advantage...Show More
Abstract: Biodiesel is an alkyl ester of long chain fatty acids and considered as an alternative to lower the appalling consequence of fuel on the environment. It is produced by transesterification of a fat or oil with a short chain primary alcohol like methanol and alkali like sodium hydroxide (NaOH). Palm oil (Elaeis guineensis) was used as source to produce biodiesel and Box Behnken experimental design was applied to see the effect of various process parameters, i.e. methanol quantity, alkali concentration and temperature for the optimization of calorific value of biodiesel. Response surface plots and contour plot were created in order to perceive the optimum condition. Though, all the three variables significantly affected the calorific value of the palm biodiesel, but it was found that methanol was more effective variable than alkali concentration and temperature. It was observed that 12.5 ml methanol/50 ml oil and 0.4 gm NaOH/50 ml oil and 55°C temperature were optimum condition, where the calorific value of palm biodiesel is 9297.206 kcal/kg.Abstract: Biodiesel is an alkyl ester of long chain fatty acids and considered as an alternative to lower the appalling consequence of fuel on the environment. It is produced by transesterification of a fat or oil with a short chain primary alcohol like methanol and alkali like sodium hydroxide (NaOH). Palm oil (Elaeis guineensis) was used as source to produ...Show More