New high pressure vapor–liquid equilibrium data and density predictions for carbon dioxide + ethyl acetate system

Vapor–liquid equilibria (VLE) data at (323.2, 333.2, 343.2, 353.2 and 363.2) K and pressures between 0.85 and 10.9 MPa for the carbon dioxide + ethyl acetate system are reported. The experimental method used in this work was a static analytical method with liquid phase sampling using a rapid on-line sampler injector (ROLSI™) coupled to a gas chromatograph (GC) for analysis. Measured VLE data and literature data for carbon dioxide + ethyl acetate system were modeled with a general cubic equation of state (GEOS) using classical van der Waals (two parameters conventional mixing rule – 2PCMR) mixing rules. A single set of interaction parameters was used to represent the VLE data, the critical line of the system and the mixture densities in a wide range of temperatures, pressures and compositions. The calculation results were compared to the new data reported in this work, and to available literature data. The results show a satisfactory agreement between the model and the experimental data.

Experimental data for carbon dioxide (1) + ethyl acetate (2) system (this work): □, 323.15 K; ◊, 333.15 K; ▵, 343.15 K; *, 353.15 K; ○, 363.15 K; GEOS/2PCMR predictions for each isotherm.Figure optionsDownload as PowerPoint slideHighlights
► New VLE data for the carbon dioxide + ethyl acetate system are reported.
► Critical comparison with literature data was made.
► The data were modeled with a general cubic equation of state (GEOS).
► Classical van der Waals two parameters mixing rules were used.
► A single set of interaction parameters was used to represent the phase behavior.