High pressure phase equilibrium of carbon dioxide and benzaldehyde binary system

The high-pressure phase equilibria of carbon dioxide + benzaldehyde binary system were measured at temperatures from 298.55 to 345.15 K and pressures from 2.20 to 14.96 MPa. The experimental method used in this work was a static-analytical method with liquid and vapor phase sampling. The experimental results are discussed and compared with available literature data. The experimental data were correlated with the Peng–Robinson equation of state (PR EoS) using classical van der Waals (two-parameter conventional mixing rule) mixing rules, which could correlate well the binary phase behavior with an average absolute relative deviation of 3.4%.

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► Phase equilibria of CO2 and benzaldehyde were measured up to 14.96 MPa.
► Experimental data were correlated with PR EoS with van der Waals mixing rules.
► PR EoS could predict well the binary phase behavior with an ARD of 3.4%.