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Isothermal Vapour-Liquid Equilibrium Data for the Hexafluoroethane (R116) + n-Butane System at Temperatures from (273 to 323) K

Abstract : Isothermal vapour-liquid equilibrium data for the system of hexafluoroethane (R-116) + n-butane are reported in this paper. The measurements were undertaken at six different temperatures ranging from 273.27 to 323.19 K, with pressure ranging from 0.104 to 3.742 MPa. Two of the temperature sets were measured below, and the remaining four were measured above the critical temperature of R116. The measurements were performed in a " static-analytic " type VLE apparatus. The sampling of the equilibrium phases was performed via pneumatic ROLS® capillary samplers (Armine's patent). The equipment was developed in the CEP/TEP laboratory at MINES ParisTech. Combined expanded uncertainties in the measurements were estimated to be 0.02 K for temperature, 0.0006 MPa for pressure, and 0.004 for composition, based on the NIST guidelines. Each set of isothermal vapour-liquid equilibrium data was correlated with the Peng-Robinson equation of state (PR-EOS). The 2 Mathias-Copeman alpha function and the Wong-Sandler mixing rule, utilizing the NRTL activity coefficient model, were incorporated into this equation of state.
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Submitted on : Monday, November 13, 2017 - 2:53:26 PM
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Deresh Ramjugernath, Alain Valtz, Dominique Richon, Mark Williams-Wynn, Christophe Coquelet. Isothermal Vapour-Liquid Equilibrium Data for the Hexafluoroethane (R116) + n-Butane System at Temperatures from (273 to 323) K. Journal of Chemical and Engineering Data, American Chemical Society, 2017. ⟨hal-01633884⟩

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