Abstract
In this study, isothermal vapor−liquid equilibrium data were measured for the 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) + isobutene system in the temperature range from (288.15 to 363.15) K at 15 K intervals. The experiments were carried out with a circulating-type apparatus with online gas chromatography. The VLE data were correlated by the Peng−Robinson equation of state with the Wong−Sandler mixing rules involving the NRTL model. The calculated results show a good agreement with the measured data, and this system presents an azeotrope at each temperature.
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