Solubility of Azelaic Acid in Supercritical Carbon Dioxide
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- 作者：Darrell L. Sparks ; Rafael Hernandez ; L. Antonio Esté ; vez ; Nicholas Meyer ; Todd French
- 刊名：Journal of Chemical & Engineering Data
- 出版年：2007
- 出版时间：July 2007
- 年：2007
- 卷：52
- 期：4
- 页码：1246 - 1249
- 全文大小：117K
- 年卷期：v.52,no.4(July 2007)
- ISSN：1520-5134
文摘
In this study, the solubility of azelaic acid in supercritical carbon dioxide has been measured at 313.15 K and333.15 K over a pressure range of 10 MPa to 30 MPa. A flow-type, dynamic apparatus was used, and the solubilitywas obtained gravimetrically. The solubility ranged from an azelaic acid mole fraction of 0.42·10-6 (333.15 K,10.0 MPa) to 10.12·10-6 (333.15 K, 26.7 MPa). The solubility results showed that the crossover point occurredat a pressure between 17 MPa and 20 MPa; at pressures below the crossover pressure, the solubility decreasedwith increasing temperatures, whereas the opposite was observed beyond the crossover pressure. No solubilitydata for azelaic acid in any supercritical fluids were found in the literature; thus, there was no reference to comparethese results. Two model types were used to correlate the data: density-based models and an equation-of-state(EoS) model. The Chrastil and the modified Méndez-Santiago and Teja (density-based) models were used, andexcellent fits were obtained. The Peng-Robinson EoS with standard van der Waals mixing rules was used alsowith excellent results.