Kinetics of soybean oil extraction using ethanol as solvent: Experimental data and modeling

Author(s)

Toda, Tatiane Akemi ^[1] ; Sawada, Mirian Megumi ^[1] ; Rodrigues, Christianne E. C. ^[1]

Affiliation

^[1] Univ Sao Paulo, LES, Food Engn Dept ZEA FZEA, POB 23, BR-13635900 Pirassununga, SP - Brazil

• Document type: Journal article
• Source: FOOD AND BIOPRODUCTS PROCESSING; v. 98, p. 1-10, APR 2016.
• Web of Science Citations: 23

Abstract

The main aim of this work was to obtain experimental data of the extraction kinetics of soybean oil and free fatty acids (FFA) for systems containing an expanded mass of soybean (collets) and ethanol with different hydration levels (0 and 5.98 mass% of water) at temperatures of 40, 50 and 60 degrees C. Through the obtained experimental data it can be seen that increasing the hydration level of ethanol suppresses the soybean oil extraction but increases the FFA extraction, while the temperature favors the solubility of both fatty compounds. The experimental data were correlated using a model proposed by So and Macdonald (1986. Can. J. Chem. Eng. 64, 80-86), which enables determination of the mass transfer coefficients in the washing and diffusion steps, and a model proposed by Perez et al. (2011. J. Food Eng. 105, 180-185) that enables the estimation of diffusivity coefficients. High values of the coefficient of determination (R-2 >= 0.9961) and low values of the average relative deviation (ARD <= 4.74%) were obtained, showing that the models used were suitable to describe the kinetics of extraction of the oil and minor compounds present in soybean. The value of the diffusivity coefficient for soybean oil increased with increasing temperature and with decreasing hydration level in the solvent, presenting values of 3.61 to 5.36 x 10(-11) m(2) s(-1). (C) 2015 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 09/17855-3 - Solid-liquid equilibrium, kinetic of minor compounds extraction, and design of extractors in the vegetable oils extraction with ethanol
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support type: Regular Research Grants
• FAPESP's process: 08/56258-8 - Phase equilibrium and purification processes in the production of biofuels and biocompounds
• Grantee: Antonio José de Almeida Meirelles
• Support type: Program for Research on Bioenergy (BIOEN) - Thematic Grants
• FAPESP's process: 11/09543-1 - SOYBEAN OIL PRODUCTION USING ETHANOL AS SOLVENT: EXPERIMENTAL DETERMINATION OF EXTRACTION KINETICS
• Grantee: Tatiane Akemi Toda
• Support type: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 10/03058-1 - Study of Technical Feasibility of Replacement of hexane by ethanol in Soybean Oil Extraction Process: Kinetics of Extraction and Indexes of Quality
• Grantee: Mirian Megumi Sawada
• Support type: Scholarships in Brazil - Master
• FAPESP's process: 13/25142-2 - Minimization of the soluble coffee processing waste through the reutilization of the grounds in oil extraction using renewable solvent
• Grantee: Tatiane Akemi Toda
• Support type: Scholarships in Brazil - Master
• FAPESP's process: 14/09446-4 - Development of a process of vegetable oil extraction using alcoholic solvents: evaluation of oil composition and changes in the protein fraction
• Grantee: Christianne Elisabete da Costa Rodrigues
• Support type: Regular Research Grants