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Öğe Biodiesel production from raw cottonseed oil and its characterization(Energy Education Science and Technolgy Part A, 2011-07) Altun, Şehmus; Yaşar, Fevzi; Öner, CengizIn this study, raw cottonseed oil of Turkish origin was transesterified using methyl alcohol and an alkali catalyst to obtain the cottonseed oil methyl ester. The obtained cottonseed oil methyl ester was analyzed by gas chromatography (GC) for determining the fatty acid composition. The fuel-related properties of cottonseed oil methyl ester, cold filter plugging point, cloud point, kinematic viscosity, density, cetane index, flash point, distillation, sulfur content and heating value were determined and compared with those of petroleum diesel fuel and international biodiesel standards. From gas chromatograph analysis, it was found that the cottonseed oil methyl ester has the more amount of total unsaturated FA, therefore, it showed better cold-flow properties than more saturated ones, as expected. Moreover, the fuel-related properties of cottonseed oil methyl ester were within the specified standardsÖğe Fuel properties of biodiesels produced from different feedstocks(Energy Education Science and Technolgy Part A, 2011) Altun, ŞehmusBio diesel is an oxygenated diesel fuel obtained from vegetable oils or animal fats via transesterification reaction. The fuel properties such as viscosity, density, cetane number and heating value are very important for determining the suitability of bio diesel as a diesel engine fuel. These fuel properties mainly depend on the feedstock which is used in the bio diesel production. In this study, the effect of bio diesels produced from different feed stocks such as inedible animal tallow, crude canola oil and canola oil blended with animal tallow on the fuel properties were experimentally investigated. Bio diesel fuels and their blends with petroluem diesel fuel were compared with petroleum diesel (petrodiesel). The results showed that the viscosity and density of all the methyl esters were higher than that of petrodiesel, while the heating values of the methyl esters was lower. Besides, the viscosity and the density of methyl esters are within the bio diesel standards, except for animal tallow methyl ester and it was slightly out of the specification EN 14214. Animal tallow bio diesel has the highest cetane number than those of other fuels include petrodiesel. It is concluded that bio diesels and their blends with petrodiesel have suitable fuel properties, especially cetane numbers, for diesel combustion process.
