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Girardi, Davi Gustavo Lisboa; Letsch, Aurora Lorini; Rebelatto, Evertan Antonio; Mayer, Diego Alex; de Oliveira, José Vladimir
Fluid phase equilibria, September 2023, 2023-09-00, Letnik: 572Journal Article
The high-pressure phase behavior of the ternary system constituted by carbon dioxide + globalide + chloroform was studied. Experiments were conducted applying the synthetic-visual method in a variable-volume view cell at a mass ratios of globalide to chloroform of 0.5:1, 1:1, and 2:1, over a temperature range from 313.15 to 343.15 K, and pressures from 5.17 to 20.25 MPa. Phase transitions of vapor–liquid bubble point (VLE-BP), vapor–liquid dew point (VLE-DP), liquid–liquid (LLE), and vapor–liquid-liquid (VLLE) type were observed. Furthermore, through the P-w diagram, the phase behavior of the ternary system in chloroform free-basis was analyzed between 0.4250 to 0.9735 of carbon dioxide mass composition. It has been observed that high quantities of chloroform lead to lower transition pressures. Moreover, PT-diagrams efficiently displayed that higher pressures are necessary to achieve a single phase medium as temperature rises, which characterize LCST behavior. PR-vdW2 model was used to estimate binary interaction parameters. Additionally, the ternary system was compared with binary systems available in the literature. The data presented in this work provides necessary information for the optimization and improvement of poly(globalide) synthesis in supercritical media. Display omitted •Data for the phase equilibrium of the ternary systems CO2 + globalide + chloroform.•Measured at temperatures from 313.15 to 343.15 K and pressures up to 20.25 MPa.•Experimental data were correlated using PR-EoS with vdW2 mixing rule.•Chloroform has been shown to be effective in decreasing phase transition pressures.
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