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Vapor–liquid equilibria (VLE) data at (333.2, 343.2, 363.2, and 373.2) K and pressures between (1.1 and 14.1) MPa and critical data (pressure–temperature–composition) at pressures between (9.1 and 13.9) MPa for the carbon dioxide + ethanol system are reported. The experimental method used in this work was a static analytical method with liquid phase sampling using a rapid online sampler injector (ROLSI) coupled to a gas chromatograph (GC) for analysis. Measured VLE data and literature data for carbon dioxide + ethanol system were modeled with a general cubic equation of state (GEOS) using classical van der Waals (two-parameter conventional mixing rule, 2PCMR) mixing rules. A single set of interaction parameters, representing the critical pressure maximum (CPM) well, was used in this work to represent the new VLE data and critical points and to predict the densities of the mixtures in a wide range of temperature, pressure, and composition. The calculation results were compared to the new data reported in this work and to available literature density data. The results show a satisfactory agreement between the model and the experimental data.

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