Vapor–Liquid Equilibrium Phase Behavior of Binary Systems of Carbon Dioxide with Eugenol or Guaiacol

Abstract

The vapor–liquid equilibrium (VLE) phase boundary data for the binary systems consisting of carbon dioxide + eugenol and carbon dioxide + guaiacol were determined experimentally in the temperature range from 313.15 to 373.15 K and at pressures up to 24 MPa. The phase transition over the entire composition range was observed by using a variable-volume and visual phase equilibrium analyzer. From the VLE phase boundary data, K-values and critical points for VLE have been estimated. The present study involved the correlation of the recently obtained VLE data with two equations of state, namely, the Soave–Redlich–Kwong and the Peng–Robinson equations. These equations were modified to incorporate the two-parameter van der Waals one-fluid mixing rule. Overall, the average absolute pressure deviations are lower than 3%.