Ding-Yu Peng

Liebermann-fried model parameters for calculating vapour-liquid equlibria of oxygenate and hydrocarbon mixtures

Abstract The Liebermann‐Fried model parameters are reported for a total of 123 binary non‐associated mixtures, covering ten oxygenates and 16 hydrocarbons. They were determined from excess enthalpies of binary mixtures available in the literature at 298.15 K. It is feasible to use these parameters for obtaining reasonably reliable vapour‐liquid equilibria at constant temperature or at constant pressure for mixtures containing the considered binary mixtures.

Predicting Excess Enthalpies of Ether and/or Hydrocarbon Binary Mixtures

Previous applications of the Flory–Patterson theory in the analysis of the excess molar enthalpies at 25°C for some binary mixtures composed of ethers, n-alkanes, br-alknes, and cycloalkanes are reviewed. The possibility of correlating the Flory interaction parameters Xij in terms of the acentric factors of the components is examined. For selected ether (1) + n-alkane(2) mixtures, a set of linear relations between X12 and the acentric factors of the n-alkanes are reported.

Excess enthalpies of cyclohexane+n-hexane+(n-octane or n-dodecane) ternary mixture at 298.15 K

Abstract Excess molar enthalpies, measured at 298.15 K in a flow microcalorimeter, are reported for the ternary mixtures (cyclohexane+ n -hexane+ n -octane) and (cyclohexane+ n -hexane+ n -dodecane). Smooth representations of the results are described and used to construct constant excess molar enthalpy contours on Roozeboom diagrams. It is shown that reasonable estimates of the excess enthalpies of the ternary mixtures can be obtained from the Flory theory, using only the physical properties of the components and their binary mixtures.

Excess Enthalpies of 2,2-Dimethylbutane + Cyclohexane + (Octane or Dodecane) at 25°C

Measurements of excess molar enthalpies at 25°C in a flow microcalorimeter,are reported for the two ternary mixtures 2,2-dimethylbutane + cyclohexane +n-octane and 2,2-dimethylbutane + cyclohexane + n-dodecane. Smoothrepresentations of the results are described and used to construct constant enthalpy contourson Roozeboom diagrams. It is shown that useful estimates of the ternary enthalpiescan be obtained from the Flory theory using only the physical properties of thecomponents and their binary mixtures.