Calculation of High-Pressure Vapor-Liquid Equilibria from a Corresponding-States Correlation with Emphasis on Asymmetric Mixtures

Abstract

The correlation of Lee and Kesler for thermodynamic properties of normal fluids is applied to mixtures. Vaporliquid equilibria at high pressures are calculated using a one-fluid theory with a new mixing rule for the pseudocritical temperature; this mixing rule appears to be applicable also to those mixtures whose components differ appreciably in molecular size. The calculational procedure, using analytical functions, is completely computerized; computer programs are available. Input data are pure-component critical properties and acentric factors plus one binary constant for each binary pair. These constants are tabulated for a large number of binary systems containing light gases (including hydrogen), carbon dioxide, hydrogen sulfide, and hydrocarbons ranging from methane to decane. Illustrative calculations indicate that the procedure described here provides good estimates of K factors, enthalpies, and other thermodynamic properties required in engineering process design.

Catalytic Ethylene Polymerisation in Carbon Dioxide as a Reaction Medium with Soluble Nickel(II) Catalysts

“…[37] This concentration corresponds to polymerisation experiments in toluene solution at about 27 atm (calculating the ethylene concentration with the data of Prausnitz et al). [38] Activities found for 6 e in toluene at 50 8C are 8 10 3 TON h À1 at 5 bar and 4 10 4 TON h À1 at 40 bar. [22] This indicates that productivities are somewhat lower in scCO 2 by comparison to toluene at the same monomer concentration, but within the same order of magnitude.…”

Hydrate Equilibrium Data for CO2+N2 System in the Presence of Tetra-n-butylammonium Fluoride (TBAF) and Mixture of TBAF and Cyclopentane (CP)

“…Lee-Kesler-Plöcker (LKP) Equation of State (EoS) 22 is applied for estimation of Z as a function of T and P using binary interaction parameter κ ij =1.11. It is assumed very low solubility of the gas in the liquid and, thus, no changes in the gas composition.…”

Planilha Eletrônica Para Estimativas De Fugacidades Usando Equação De Lee-Kesler

“…Escolha da regra de mistura: Se a quantidade de espécie for diferente de um, o aplicativo abre a caixa de diálogo para a escolha da regra de mistura: a) Lee e Kesler (1975) e b) Plocker et al (1978).…”

“…Plocker et al (1978) fornecem os valores dos parâmetros de interação binária para 150 sistemas binários.…”