Korean Journal of Chemical Engineering, Vol.37, No.3, 402-410, March, 2020
Free-volume theory coupled with modified group-contribution PC-SAFT for predicting viscosities of 1-alkenes
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A modified group-contribution PC-SAFT EoS combined with the Free-volume theory (FVT), recently proposed (DOI:10.1016/j.fluid.2019.112280) to simultaneously model the fluid phase equilibria and viscosity of fluids, is extended in this work to estimate the viscosity of 1-alkenes. Generalized correlation coefficients are proposed for the FVT triplet parameter set, which makes it possible to extrapolate the viscosity prediction of similar compounds that are not included in the fitting pool. The model is validated using a large experimental data of 1-alkenes over wide range of temperature and pressure (up to 2,500 bars). For 1-pentene to 1-triacontene, the overall average absolute deviation of the experimental liquid and vapor viscosity from those calculated by the model is of 5.37% and 1.41%, respectively, which are appropriate for most industrial applications.
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