Abstract
Vapor-liquid equilibrium state of carbon dioxide (CO2) + 1,1,1,2-tetrafluoroethane (R-134a) mixture at 329.60, 339.10 and 354K and pressures upto 7.369 MPa have been measured in the whole range of compositions. Monophasic PvT properties were also determined for R-134a at temperatures from 313.13 to 342.9 K upto 25 MPa with an uncertainty lower than ±0.05%. The classical calibration method of the vibrating tube densimeter was used with N2 and H2O as reference fluids. The parameters of the Peng-Robinson equation of state (PR EoS) for both classical and Wong-Sandler mixing rules were fitted to experimental vapor-liquid equilibria at 329.60 K and used to predict the vapor-liquid equilibria at higher temperatures. Wong-Sandler mixing rules give better results than the classical mixing rules. The R-134a densities reported in this work were compared to the calculated values using the Tillner-Roth-Baehr EoS.
Original language | English |
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Pages (from-to) | 213-222 |
Number of pages | 10 |
Journal | Fluid Phase Equilibria |
Volume | 199 |
Issue number | 1-2 |
DOIs | |
State | Published - 30 Jun 2002 |
Externally published | Yes |
Keywords
- Apparatus
- EoS
- Mixing rules
- PvT data
- VLE data