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Kinetics and Thermodynamics Studies of Oil Transesterified From Castor Seeds

Transesterification process of oil was performed using methanol and calcined catalyst refluxed at 50 o C for 1 hr as the catalyst activation step. The optimum methanol concentration was 250 g, and the highest oil yield was obtained at 65 o C temperatures, agitation rate of 1000 rpm and the reaction time of 3hr. The transesterification process was observed with regard to the percent oil yield versus time, and the reaction order was found to be 1 st -order reaction kinetics by the differential method. The activation energy for the oil transesterification kinetics of castor seeds was found to be Ea = 9.84 J/mol at the Arrhenius constant of 0.14 s-1. The other thermodynamic parameters ∆H and ∆S were calculated to be 0.06 J/mol, and 197.50 J/mol K respectively, which were used to deduce ∆G at different temperatures.