Work

Rice bran oil extraction with CO2-expanded acetone: kinetics modeling, and thermodynamics aspects

Year: 2025

Type: article

Abstract: Mathematical modeling for process control, simulation, optimization, and equipment design is necessary to gain technological insights. This study compares kinetic models and emphasizes thermodynamic aspects of rice bran oil extraction with CO 2 -expanded acetone. Analysis of extraction kinetic data shows that the modified Fick’s model is superior to Peleg’s model. A thermodynamic study demonstrates that adding CO 2 to acetone lowers the activation energy by 68 %. Moreover, the enthalpy, entropy, and Gibbs free energy changes for CO 2 -expanded acetone extraction at 5.0 MPa, 25 °C, and a CO 2 mole fraction of 0.76 are determined to be 141.10 KJ/mol, 9.80 J/mol, and –2.90 KJ/mol, respectively, indicating that the rice bran oil extraction process is endothermic, irreversible, and spontaneous. These findings enhance the design and scale-up of efficient bio-oil extraction processes using CO 2 -expanded acetone.

Source: Chemical Thermodynamics and Thermal Analysis

DOI: 10.1016/j.ctta.2025.100219

Authors: Mathayo Gervas Mathias, Idzumi Okajima

Institutions: Shizuoka University, University of Dar es Salaam

Language: English

Topic: Phase Equilibria and Thermodynamics

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Climate action

Open Access status: gold

Estimated APC paid: $1,350