Experimental Research And Simulation Of Supercritical CO₂ Extraction Of Seed Oil From Grape Seed

The article determined the technical process of supercritical CO₂ extraction based on experimental research and optimized the extraction condition of grape seed oil .In this paper the mathematical model of supercritical fluid extraction were set up together with the principle of mass balance and analyzed the mass transfer process of supercritical fluid extraction.The following two aspects were discussed in this paper .In experimental study, the extraction of oil from grape seed using supercritical carbon dioxide was investigated. The optimal extraction parameters were selected through orthogonal experiment and verifying experiments. In this work, the extraction rate was analyzed as a function of the extraction pressure, temperature, fluid flow-rate and separate pressure. The optimization extraction condition is:extraction pressure : 30Mpa extraction temperature: 50℃fluid flow-rate: 8 kg/hseparate I pressure: 12MPa separate I temperature:45℃separate II pressure: 5⁵. 5MPa separate II temperature:40℃extraction time: 2.5 hAccording to the experiment data, F-test was employed on significance of each factor. The result was that all factors were insignificant except forextraction pressure under the level. The result could be applied for relevant engineering expansions.According to the experimental data, the model for the relation between the grape oil yield and the extraction time was obtain based on the principle of mass balance with several hypotheses. Investigated of the harmony with the mathematical model and experimental data which got different values of mass transfer coefficient to the solid phase ks, the mass transfer coefficient to the fluid phase kf and the efficiency grinding rate GThe significance of mathematical model was tested, and regression coefficients between the proposed model and experimental data were estimated 0.99. Besides, the reliability of the model was tested under different extraction pressure and temperature and super carbon dioxide flux. This model is not only suitable for this experiment, but also applicable for the relevant application and their engineering expansions.