Experimental determination of the critical line for (carbon dioxide  +  ethane) and calculation of various thermodynamic properties for (carbon dioxide  + n-alkane) using the PSRK model
✍ Scribed by Sven Horstmann; Kai Fischer; Jürgen Gmehling; Petr Kolář
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 330 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0021-9614
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✦ Synopsis
The binary (carbon dioxide + ethane) exhibits an unusual and interesting phase equilibrium behaviour especially in the critical region of the pure components and their mixtures. The critical line of this system was determined by using a flow apparatus. The experimental results were compared with the predictive Soave-Redlich-Kwong (PSRK) model. In this paper the PSRK model was also applied to the calculation of critical points, (vapour + liquid) equilibria, azeotropic points, excess enthalpies (H E ), excess volumes (V E ), and Henry's coefficients (H 12 ). The investigated systems included (carbon dioxide + ethane, or propane, or n-butane, or n-hexadecane). In the PSRK calculations only one pair of temperature-dependent interaction parameters is required for (carbon dioxide + an nalkane). The calculated results were compared with experimental data. The relation of excess properties with phase equilibria in (carbon dioxide + ethane) was discussed in detail.