Viscosity and Density of Olephins at High Temperatures and Pressures

Density and viscosity of 1–hexene (6) 1–heptene (7) 1–octene (8) 1–decene (10) and their binary [25%(6) + 75%(10) 50%(6) + 50%(10) 75%(6) + 25%(10) 25%(6) + 75%(8) 50%(6) + 50%(8) 75%(6) + 25%(8) 50%(6) + 50%(10)] ternary [333%(6) + 333%(8) + 333%(10)] mixtures were simultaneously measured over the temperature range from 193 K to 465 K and at pressures up to 245 MPa using the hydrostatic weighing and falling-body techniques. The expanded uncertainty of the density pressure temperature and viscosity measurements at the 95% confidence level with a coverage factor of k=2 is estimated to be 0.15%-0.30% 0.05 % 0.02 K and 1.5% – 2.0% (depending on temperature and pressures ranges) respectively. Tait–type equation of state (EOS) for pure 6 7 8 and 10 was developed using the measured (pρT) data. Theoretically based Arrehenius – Andrade and Vogel – Tamman – Fulcher type equation with pressure dependent coefficients was used to describe the temperature dependence of measured viscosities for pure olephins.