Abstract
This paper reports experimental results lor the viscosity of gaseous HFC-125 (pentafluoroethane) under high pressures. The measurements were carried out with an oscillating-disk viscometer of the Maxwell type at temperatures from 298.15 to 423.15 K and at pressures up to the saturated vapor pressures at each temperature at subcritical conditions or up to 9 MPa at supercritical temperatures. Intermolecular scaling parameters of HFC-125 for the extended corresponding states were determined from the viscosity data at 0.1 MPa. An empirical viscosity equation is proposed to interpolate the present experimental results as a function of temperature and density.
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REFERENCES
M. Takahashi, N. Shibasaki-Kitakawa, C. Yokoyama, and S. Takahashi, J. Chem. Eng. Data 40:900 (1995).
N. Shibasaki-Kitakawa, M. Takahashi, and C. Yokoyama, Int. J. Thermophys. 20:435 (1999).
M. Takahashi, N. Shibasaki-Kitakawa, and C. Yokoyama, Int. J. Thermophys. 19:1285 (1998).
D. E. Diller and S. M. Peterson, Int. J. Thermophys. 14:55 (1993).
C. M. B. P. Oliveira and W. A. Wakeham, Int. J. Thermophys. 14:1131 (1993).
P. J. Dunlop, J. Chem. Phys. 100:3149 (1994).
M. Takahashi, C. Yokoyama, and S. Takahashi, J. Chem. Eng. Data 33:267 (1988).
M. Takahashi, C. Yokoyama, and S. Takahashi, Trans. JAR 6:57 (1989).
C. Yokoyama, M. Takahashi, and S. Takahashi, Int. J. Thermophys. 15:603 (1994).
C. Yokoyama and M. Takahashi, Int. J. Thermophys. 18:1369 (1997).
K. Stephan, R. Krauss, and A. Laesecke, J. Phys. Chem. Ref. Data 16:993 (1987).
R. T. Jacobsen and R. T. Stewart, J. Phys. Chem. Ref. Data 2:757 (1973).
J. Kestin, K. Knierim, E. A. Mason, B. Najafi, S. T. Ro, and M. Waldman, J. Phys. Chem. Ref. Data 13:229 (1984).
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Takahashi, M., Shibasaki-Kitakawa, N. & Yokoyama, C. Viscosity of Gaseous HFC-125 (Pentafluoroethane) Under High Pressures. International Journal of Thermophysics 20, 445–453 (1999). https://doi.org/10.1023/A:1022648819511
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DOI: https://doi.org/10.1023/A:1022648819511