Fluid-phase-equilibrium prediction of fluorocompound-containing binary systems with the predictive E-PPR78 model. (January 2017)

• Record Type: Journal Article
• Authors: Qian, Jun-Wei; Privat, Romain; Jaubert, Jean-Noël; Coquelet, Christophe; Ramjugernath, Deresh
• Is Part Of: International journal of refrigeration. Volume 73(2017:Jan.)
• Page Start: 65
• Page End: 90
• Publication Date: 2017-01
• Subjects: Equation of state -- PPR78 -- Vapor–liquid equilibrium -- Predictive model -- Binary interaction parameters -- Fluorocompound -- Critical locus -- Azeotropy; Équation d'état -- PPR78 -- Équilibre vapeur-liquide -- Modèle prédictif -- Paramètres binaires d'interaction -- Fluorocomposé -- Centre critique -- Azéotropie; Refrigeration and refrigerating machinery -- Periodicals; 621.56
• DOI: 10.1016/j.ijrefrig.2016.09.013
• Languages: English
• ISSNs: 0140-7007

Abstract

Highlights: The applicability range of the predictive E -PPR78 equation of state is extended. Six new groups: C2 F6, CF3, CF2, = CF 2 ⇔ = CF, C2 H4 F2 and C2 H2 F4 are added. The E -PPR78 model is now applicable to fluorocompound-containing mixtures. Abstract: In order to reduce the overall emissions of greenhouse gases and to be in compliance with the current environmental regulations, a new class of refrigerants has appeared. Such refrigerants are generally multi-component systems that contain a fluorocompound mixed with CO2 and/or an alkane. In order to design processes involving such blends or to implement a product-design approach aimed at identifying new refrigerant mixtures, an equation of state (EoS) able to predict the properties of fluorocompound-containing systems is required. In order to reach this goal, it was decided in this study to add six fluorinated groups to the E nhanced-PPR78 model which combines the Peng–Robinson EoS and a group contribution method aimed at estimating the binary interaction parameters, kij ( T ), involved in Van der Waals one-fluid mixing rules.