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Isothermal Vapor–Liquid Equilibrium Data for Binary Mixtures of Hexafluoroethane (R116) + n-Pentane or n-Hexane at Two Temperatures, 288 and 296 K

Cite this: J. Chem. Eng. Data 2018, 63, 5, 1228–1233
Publication Date (Web):February 28, 2018
https://doi.org/10.1021/acs.jced.7b00836
Copyright © 2018 American Chemical Society

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    Abstract

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    The isothermal vapor–liquid equilibrium (VLE) data for two hexafluoroethane (R-116)/n-alkane systems were each measured at two temperatures of 288 and 296 K. The two n-alkanes of interest are n-pentane and n-hexane. The pressures which were measured ranged from 0.017 to 7.040 MPa. A “static-analytic” VLE apparatus, equipped with pneumatic Rapid Online Sampler-Injector (ROLSI) capillary samplers, was used to perform the measurements. The ROLSI gives this apparatus the capability of sampling both the liquid and the vapor phases, without significant equilibrium perturbation with respect to the estimated analytical uncertainties. Vapor–liquid–liquid equilibria and liquid–liquid equilibria were experienced at R-116 compositions close to unity for the R-116 and n-hexane system. Each of the four Pxy VLE data sets was correlated with the Peng–Robinson equation of state, modified by the inclusion of the Mathias-Copeman alpha function in preference to the original Peng-Robinson configuration. The Wong-Sandler mixing rule, combined with the non-random two-liquid (NRTL) activity coefficient model, was used to account for the properties of the mixture.

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    Cited By

    This article is cited by 3 publications.

    1. Mark D. Williams-Wynn, Paramespri Naidoo, Deresh Ramjugernath. Isothermal Bubble Pressure Data for the Binary System of C2F6 and n-Octane. Journal of Chemical & Engineering Data 2018, 63 (12) , 4795-4800. https://doi.org/10.1021/acs.jced.8b00825
    2. Mark D. Williams-Wynn, Francisco Adrián Sánchez, Paramespri Naidoo, Selva Pereda, Deresh Ramjugernath. Modeling of Trifluoromethane (R-23) or Hexafluoroethane (R-116) and Alkane Binary Mixtures using the Group-Contribution with Association Equation of State. Industrial & Engineering Chemistry Research 2018, 57 (31) , 10640-10648. https://doi.org/10.1021/acs.iecr.8b01933
    3. Jean-Noël Jaubert, Jun-Wei Qian, Silvia Lasala, Romain Privat. The impressive impact of including enthalpy and heat capacity of mixing data when parameterising equations of state. Application to the development of the E-PPR78 (Enhanced-Predictive-Peng-Robinson-78) model.. Fluid Phase Equilibria 2022, 560 , 113456. https://doi.org/10.1016/j.fluid.2022.113456

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