Abstract
The phase behavior for natural gas mixtures with high CO2 content and heavier hydrocarbons up to pentane for cryogenic separation has been obtained through simulation using Peng-Robinson (PR) model. The bubble point and dew point curves which define the liquid-vapor and solid-vapor domains for separation are obtained by generating the pressure-temperature phase diagram. The simulations are performed using Aspen HYSYS. The validation for the use of PR model is done by comparing the results of CO2 freeze-out temperature predictions for PR and Soave-Redlich-Kwong (SRK) model with the experimental data available in the literature.
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