In the study the yield and kinetic and thermodynamic parameters of the oil extraction process from Jatropha curcas L. using ethanol\nas a solvent were evaluated for different temperatures, moisture contents of the solid phase, and particle sizes.The extraction process\nyield increased with contact time of solid particles with the solvent until reaching equilibrium (saturation of the solvent), for all\nthe temperatures, moisture contents, and average particle sizes. These parameters significantly influenced (95% confidence) the\nextracted oil yield. A convective mass transfer model was used to simulate the extraction process and estimate the kinetic and\nthermodynamic parameters. For all conditions evaluated, values of oil yield in the liquid phase close to equilibrium were obtained\nin approximately 20 min. The variations of enthalpy and entropy were positive, indicating that the process is endothermic and\nirreversible. Values obtained for the variation in Gibbs free energy showed that the extraction process using ethanol as a solvent\nis spontaneous and thermodynamically favorable for the moisture content of 0%, where the smaller the average particle size the\ngreater the spontaneity of the process.
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