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Thermodynamic and statistical analysis of soybean oil extraction process using renewable solvent
Author(s) -
Rodrigues Christianne E. C.,
Aracava Keila K.,
Abreu Fernanda N.
Publication year - 2010
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2010.02417.x
Subject(s) - solvent , extraction (chemistry) , enthalpy , response surface methodology , aqueous solution , chemistry , entropy (arrow of time) , yield (engineering) , soybean oil , chromatography , materials science , thermodynamics , organic chemistry , physics , food science , metallurgy
Summary The main goal of this work was to evaluate thermodynamic parameters of the soybean oil extraction process using ethanol as solvent. The experimental treatments were as follows: aqueous solvents with water contents varying from 0 to 13% (mass basis) and extraction temperature varying from 50 to 100 °C. The distribution coefficients of oil at equilibrium have been used to calculate enthalpy, entropy and free energy changes. The results indicate that oil extraction process with ethanol is feasible and spontaneous, mainly under higher temperature. Also, the influence of water level in the solvent and temperature were analysed using the response surface methodology (RSM). It can be noted that the extraction yield was highly affected by both independent variables. A joint analysis of thermodynamic and RSM indicates the optimal level of solvent hydration and temperature to perform the extraction process.