Phase Behavior Data of (CO2 + Toluene + Phenanthrene) and (CO2 + (Methanol + Phenanthrene) Systems at High Pressure

Abstract

In this work, the phase equilibrium data of the ternary systems (CO2 + toluene + phenanthrene) and (CO2 + methanol + phenanthrene) at high pressure are reported. The static synthetic method, with a new design of a variable-volume view cell, was used to obtain the vapor liquid (VL) and solid–liquid (SL) transition data in a temperature range of (274 to 363) K and pressures up to 16 MPa. For the ternary system (CO2/toluene/phenanthrene), the mole fractions of carbon dioxide varied from (0.6 to 0.90) with two toluene to phenanthrene molar ratios of (6/1) and (12/1). For the system (CO2/methanol/phenanthrene) the CO2 molar fractions varied from 0.33 to 0.75 with methanol to phenanthrene molar ratios of (150/1) and (250/1). For these two ternary systems, (vapor + liquid), and (solid + liquid) transitions were observed. Results shows that carbon dioxide acts as antisolvent for the system toluene/phenanthrene and as cosolvent for the systems methanol/phenanthrene.