SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (5): 641-645.DOI: 10.1016/j.cjche.2016.10.003

• Chemical Engineering Thermodynamics • 上一篇    下一篇

Measurement and calculation of solubility of quinine in supercritical carbon dioxide

Fatemeh Zabihi1, Mehrdad Mirzajanzadeh2, Jingfu Jia3, Yaping Zhao3   

  1. 1 Department of Chemical Engineering, Islamic Azad University, Ayatollah Amoli Branch Amol, Iran;
    2 Department of Chemical Engineering, Islamic Azad University, Tehran Science and Research Branch, Tehran, Iran;
    3 School of Chemistry & Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • 收稿日期:2016-02-11 修回日期:2016-10-10 出版日期:2017-05-28 发布日期:2017-07-06
  • 通讯作者: Yaping Zhao,E-mail address:ypzhao@sjtu.edu.cn
  • 基金资助:
    Supported by the National Natural Science Foundation of China (20976103).

Measurement and calculation of solubility of quinine in supercritical carbon dioxide

Fatemeh Zabihi1, Mehrdad Mirzajanzadeh2, Jingfu Jia3, Yaping Zhao3   

  1. 1 Department of Chemical Engineering, Islamic Azad University, Ayatollah Amoli Branch Amol, Iran;
    2 Department of Chemical Engineering, Islamic Azad University, Tehran Science and Research Branch, Tehran, Iran;
    3 School of Chemistry & Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2016-02-11 Revised:2016-10-10 Online:2017-05-28 Published:2017-07-06
  • Supported by:
    Supported by the National Natural Science Foundation of China (20976103).

摘要: Solubility of quinine in supercritical carbon dioxide (SCCO2) was experimentally measured in the pressure range of 8 to 24 MPa, at three constant temperatures:308.15 K, 318.15 K and 328.15 K. Measurement was carried out in a semi-dynamic system. Experimental data were correlated by iso-fugacity model (based on cubic equations of state, CEOS), Modified Mendez-Santiago-Teja (MST) and Modified Bartle semi-empirical models. Two cubic equations of state:Peng-Robinson (PR) and Dashtizadeh-Pazuki-Ghotbi-Taghikhani (DPTG) were adopted for calculation of equilibrium parameters in CEOS modeling. Interaction coefficients (kij & lij) of van der Waals (vdW) mixing rules were considered as the correlation parameters in CEOS-based modeling and their contribution to the accuracy of model was investigated. Average Absolute Relative Deviation (AARD) between correlated and experimental data was calculated and compared as the index of validity and accuracy for different modeling systems. In this basis it was realized that the semi-empirical equations especially Modified MST can accurately support the theoretical studies on phase equilibrium behavior of quinine-SCCO2 media. Among the cubic equations of state DPGT within two-parametric vdW mixing rules provided the best data fitting and PR within one-parametric vdW mixing rules demonstrated the highest deviation respecting to the experimental data. Overall, in each individual modeling system the best fitting was observed on the data points attained at 318 K, which could be perhaps due to the moderate thermodynamic state of supercritical phase.

关键词: Supercritical fluid, Solubility, Semi-empirical model, Iso-fugacity, Quinine

Abstract: Solubility of quinine in supercritical carbon dioxide (SCCO2) was experimentally measured in the pressure range of 8 to 24 MPa, at three constant temperatures:308.15 K, 318.15 K and 328.15 K. Measurement was carried out in a semi-dynamic system. Experimental data were correlated by iso-fugacity model (based on cubic equations of state, CEOS), Modified Mendez-Santiago-Teja (MST) and Modified Bartle semi-empirical models. Two cubic equations of state:Peng-Robinson (PR) and Dashtizadeh-Pazuki-Ghotbi-Taghikhani (DPTG) were adopted for calculation of equilibrium parameters in CEOS modeling. Interaction coefficients (kij & lij) of van der Waals (vdW) mixing rules were considered as the correlation parameters in CEOS-based modeling and their contribution to the accuracy of model was investigated. Average Absolute Relative Deviation (AARD) between correlated and experimental data was calculated and compared as the index of validity and accuracy for different modeling systems. In this basis it was realized that the semi-empirical equations especially Modified MST can accurately support the theoretical studies on phase equilibrium behavior of quinine-SCCO2 media. Among the cubic equations of state DPGT within two-parametric vdW mixing rules provided the best data fitting and PR within one-parametric vdW mixing rules demonstrated the highest deviation respecting to the experimental data. Overall, in each individual modeling system the best fitting was observed on the data points attained at 318 K, which could be perhaps due to the moderate thermodynamic state of supercritical phase.

Key words: Supercritical fluid, Solubility, Semi-empirical model, Iso-fugacity, Quinine