A Modified Soave Equation of State for Phase Equilibrium Calculations. 1. Hydrocarbon Systems

Abstract

The Soave modification of the Redlich-Kwong equation of state is shown to work well for the estimation of the vapor-liquid equilibrium behavior of a wide variety of technically important hydrocarbon mixtures. The American Petroleum Institute's Technical Data Book-Petroleum Refining recently adopted a modified Soave procedure for vapor-liquid equilibria calculations. It is the purpose here to present the finished form of the correlation for treating mixtures of hydrocarbons of importance to the natural gas and petroleum refining industries. The complete correlation is fully generalized, requiring only the readily available characterization parameters to make equilibrium calculations. The utility of the correlation is demonstrated by equilibria predictions for binary and multicomponent defined and undefined hydrocarbon systems.

Simulation of supercritical flows in rocket-motor engines: application to cooling channel and injection system

“…where X k is the mole fraction of species k and κ ij are the binary interaction coe©cients [12] between species i and j. The constants a i , b i , and α i are determined from the universal relationships given in Table 2 where T c and p c are, respectively, replaced by T ci and p ci , the critical temperature and pressure of species.…”

The Use of Fuel Gas as Stripping Medium in Atmospheric Distillation of Crude Oil

“…It can also handle mixtures containing H 2 , as it uses a correlation specifically derived for hydrogen, to calculate the Soave parameter, (α H 2 ), for this component [7]. The equation of state is also suitable for mixtures containing CO 2 , H 2 S, N 2 , CO by use of suitable binary interaction parameters [8,9]. Typical TBP curves show heavy and light tails of the distillation products.…”

An Offshore Natural Gas Transmission Pipeline Model and Analysis for the Prediction and Detection of Condensate/Hydrate Formation Conditions

“…In general, for the prediction of flow rate, pressure and temperature variation of gas along pipelines, three equations of mass, momentum and energy balance are solved simultaneously. These equations for a pipeline with angle θ from horizontal are as follows [8].…”