“PRSV — An improved peng‐robinson equation of state with new mixing rules for strongly nonideal mixtures”

Two new composition dependent mixing rules for cubic equations of state are proposed. Both mixing rules contain two adjustable binary parameters and reduce to the conventional one parameter mixing rule when the parameters are equal. Vapor-liquid equilibrium data for mixtures of polar (associated or not) compounds with saturated hydrocarbons and for systems water/alcohol have been used to test the new mixing rules applied to the PRSV cubic equation of state. For these highly nonideal systems, correlation of the data with a new mixing rule of the Van Laar type for the PRSV equation gives better results than those obtained using excess Gibbs energy functions like the Wilson equation, NRTL and UNIQUAC.

[1]  H. Wenzel,et al.  Calculation of vapour-liquid equilibrium of associated systems by an equation of state , 1982 .

[2]  R. Stryjek,et al.  PRSV: An improved peng—Robinson equation of state for pure compounds and mixtures , 1986 .

[3]  W. B. Whiting,et al.  Equations of state for strongly nonideal fluid mixtures: Application of local compositions toward density-dependent mixing rules , 1982 .

[4]  J. Prausnitz,et al.  LOCAL COMPOSITIONS IN THERMODYNAMIC EXCESS FUNCTIONS FOR LIQUID MIXTURES , 1968 .

[5]  J. Mollerup.  A note on excess Gibbs energy models, equations of state and the local composition concept , 1981 .

[6]  F. J. Krambeck,et al.  Conversion of propylene and butylene over ZSM‐5 catalyst , 1986 .

[7]  Amyn S. Teja,et al.  A NEW CUBIC EQUATION OF STATE FOR FLUIDS AND FLUID MIXTURES , 1982 .

[8]  M. Huron,et al.  New mixing rules in simple equations of state for representing vapour-liquid equilibria of strongly non-ideal mixtures☆ , 1979 .

[9]  M. S. Spencer.  Catalysis by Zeolites , 1986 .

[10]  J. Prausnitz,et al.  Generalized van der Waals theory for dense fluids , 1972 .

[11]  V. Hooff,et al.  Low Temperature Reactions of Olefins on Partially Hydrated Zeolite H-ZSM-5 , 1980 .

[12]  D. Peng,et al.  A New Two-Constant Equation of State , 1976 .

[13]  J. Prausnitz,et al.  Statistical thermodynamics of liquid mixtures: A new expression for the excess Gibbs energy of partly or completely miscible systems , 1975 .

[14]  Paul M. Mathias,et al.  Extension of the Peng-Robinson equation of state to complex mixtures: Evaluation of the various forms of the local composition concept , 1983 .

[15]  N. Chen,et al.  M2 forming - A process for aromatization of light hydrocarbons , 1986 .

[16]  R. Stryjek,et al.  An Improved Cubic Equation of State , 1986 .

[17]  G. M. Wilson,et al.  Vapor-Liquid Equilibrium. XI. A New Expression for the Excess Free Energy of Mixing , 1964 .