Optimization and Kinetic Study of Soybean Oil Extraction Rate with Ternary Solvents Mixture
1Usenu, A.I., 1 Aremu, M.O., 2 Tjani, I.A., 3 Idowu, A.F. and 1,4,5*Alade, A.O.
1Department of Chemical Engineering, Ladoke Akintola University of Technology. P.M.B. 4000, Ogbomoso, Nigeria
2Department of Chemical Engineering, University of Ilorin, Ilorin, Kwara State, Nigeria
3Department of Food Science, Ladoke Akintola University of Technology P.M.B 4000, Ogbomoso, Nigeria
4Science and Engineering Research Group (SAERG), Ladoke Akintola University of Technology P.M.B 4000, Ogbomoso, Nigeria
5Bioenvironmental, Water and Engineering Research Group (BWERG), Ladoke Akintola University of Technology P.M.B 4000, Ogbomoso, Nigeria
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The rate of Soybean (Glycine max) oil (SBO) extraction with a ternary solvent mixture (water, ethanol, and ethyl acetate) optimised with I-optimal Design (IOD) under the Mixture Methodology of the Design Expert (126.96.36.199). The data obtained were analysed statistically. The effect of extraction time (60-180 mins) and temperature (65-70 °C) on SBO was investigated and data obtained were used to evaluate the suitable kinetic and thermodynamic properties of the extraction. The maximum Rate of Oil Yield (32.35 mg/min) was achieved at the solvent mixture of 9.17% water, 6.67% ethanol, and 84.17% ethyl acetate. The Quadratic model best describes the Rate of Oil Yield, with a correlation coefficient (R2) of 0.9922 and an Adjusted R2 of 0.9825. The rate equation for the extraction process is a first-order reaction with ‘n’ value of 1.12756 (≅1.000) while the activation energy (Ea) and Arrhenius constant were 6508.1 kJ/mol and 38.901 s-1, respectively. The study has demonstrated the suitability of I-Optimal Design for the investigation of the Rate of Oil Yield from soybean and the result could be employed in oil extraction process design.
Keywords: Extraction Rate, Soybean Oil, Ternary Solvent, Optimisation