Solubility Determination and Model Prediction of Olive Husk Oil in Supercritical Carbon Dioxide and Cosolvents
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- 作者：Antonio de Lucas ; Ignacio Gracia ; Jesusa Rincó ; n ; Marí ; a Teresa Garcí ; a
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2007
- 出版时间：July 4, 2007
- 年：2007
- 卷：46
- 期：14
- 页码：5061 - 5066
- 全文大小：67K
- 年卷期：v.46,no.14(July 4, 2007)
- ISSN：1520-5045
文摘
Solubility of olive husk oil in supercritical carbon dioxide and cosolvents was determined using a dynamicflow method. The aim of the work was to determine the best processing conditions leading to maximumsolubility and to obtain an empirical correlation to predict these data for further scale-up applications. Theeffect of pressure (15-35 MPa) and temperature (313-353 K) on the solubility showed that the solubilityincreases as the density increases. The cosolvent effect was studied in a range close to maximum solubility(30-35 MPa and 328-338 K). The cosolvents selected were methanol and ethanol in 1 and 5% (v/v)concentrations. In this case, the solubility enhancement was mainly caused by the formation of interactionsbetween solute and cosolvent molecules. In the experimental range, the classical empirical models cannot beused properly because they are only based on the relation between the solubility and fluid density. Amodification of the empirical correlations has been proposed introducing a new term that considers the cosolventpercentage. These modified correlations can be used to estimate olive husk oil solubilities when workingusing CO2 or CO2-cosolvent mixtures.