Now a day’s increasing in prices and depletion of fossil fuels, creates very necessary to find out an alternative fuel (biodiesel) from non-edible oil seeds. This paper deals with the transesterification of custard apple seed oil by means of methanol in presence of Potassium hydroxide catalyst at less than 65 ̊C.The viscosity of biodiesel produced from custard apple seed oil is nearer to that of the commercially available diesel. The custard apple seed oil is characterized by GC (gas chromatography) analysis and the important properties of biodiesel such as density, flash point, cloud point, pour point and kinematic viscosity, ash content, carbon residue are found out and compared with that of ASTM-biodiesel standards and commercially available diesel. The study encourages the production of biodiesel from Custard Apple seed (Annona squamosa) Oil and value addition of custard apple fruit.
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