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Characterization of Biodiesel Fuels

Abstract Biodiesel is a domestic, renewable fuel for diesel engines derived from natural oils like soybean oil, and which meets the specifications of ASTM D 6751. Technically, biodiesel is a diesel engine fuel comprised of mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats, designated B100, and meeting the requirements of ASTM D 6751. The properties of biodiesel are close to diesel fuels. The biodiesel was characterized by determining its viscosity, density, cetane number, cloud and pour points, characteristics of distillation, flash and combustion points, chemical composition of fatty acids, and higher heating value according to ISO norms. The kinematic viscosity values of biodiesels are between 3.6 and 4.6 mm 2 /s. The kinematic viscosity of No. 2 diesel fuel is 2.7 mm 2 /s at 311 K.