Prediction of solubilities of solid solutes in carbon dioxide-expanded organic solvents using the predictive Soave-Redlich-Kwong (PSRK) equation of state

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• 作者：Chie-Shaan Su ; ^{cssu@ntut.edu.tw}
• 关键词：Solubility ; CO2-expanded organic solvent ; PSRK ; Volume expansion
• 刊名：Chemical Engineering Research and Design
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：91
• 期：6
• 页码：1163-1169
• 全文大小：485 K

文摘

In this study, the solubilities of solid solutes in carbon dioxide (CO₂)-expanded organic solvents are predicted using the predictive Soave-Redlich-Kwong (PSRK) equation of state (EOS). The liquid-phase compositions and volume expansion ratios of CO₂-expanded organic solvents are predicted prior to the solubility predictions. With predicted liquid-phase compositions and volumetric properties, the solubilities of cholesterol in CO₂-expanded acetone, naphthalene in CO₂-expanded toluene, stearic acid in CO₂ expanded ethyl acetate and tetradecanoic acid in CO₂-expanded ethyl acetate are predicted according to their reference solubilities in pure organic solvents. In addition to satisfactory predictions of liquid-phase composition and volume expansion ratios, the PSRK EOS also provides qualitative prediction ability for solubilities of solid solutes in CO₂-expanded organic solvent. This study demonstrated that the PSRK EOS was a simple model with predictive ability for solubility evaluation in preliminary process design and development for supercritical fluid technology using CO₂-expanded organic solvents.