Measurement and modeling of tracer diffusivities of α-pinene in supercritical CO2, and analysis of their hydrodynamic and free-volume behaviors

- Measurement of α-pinene diffusivities in SC-CO2 at 313.15-333.15 K and 175-275 bar.
- D12 data exhibit good trends with P, T, density and Stokes-Einstein coordinates.
- Modeling with 10 predictive equations with errors between 2.50% and 63.37%.
- Best results by Vaz-Magalhães-Silva (2.50%), He-Yu-Su (4.20%), Catchpole-King (4.94%) and Wilke-Chang (5.34%).
- Calculated effective diameters only depend on T and shows good free-volume behavior.