抄録
The high pressure vapor-liquid equilibria for carbon dioxide + limonene + linalool + ethanol system were measured at 313.2 K and 6.9 MPa to study an entrainer effect of ethanol. An experimental apparatus used was based on a circulation-type method for liquid phase sampling and a flow-type method for vapor phase sampling. The relative volatilities between limonene and linalool slightly increase by addition of ethanol as an entrainer. SRK equation of state was used to correlate the vapor-liquid equilibrium data obtained in this work. The critical properties and acentric factors of limonene and linalool were estimated by group contribution methods. An exponent-type mixing rule was applied for the attractive term of the equation of state. Interaction parameters for carbon dioxide + citrus oil component and carbon dioxide + ethanol were determined from the vapor-liquid equilibrium data of each binary system. The interaction parameters for citrus oil component + ethanol were obtained from the data of the carbon dioxide + citrus oil component + ethanol ternary systems. The correlated results are in fair agreement with the experimental data.
