MODIFIED SOAVE EQUATION OF STATE FOR PHASE-EQUILIBRIUM CALCULATIONS .3. SYSTEMS CONTAINING HYDROGEN

In two previous papers by the authors, the Soave equation of state was used to treat systems containing hydrocarbons and a number of technically important nonhydrocarbon gases. While not necessary for hydrocarbons, binary interaction coefficients are required to properly correlate the phase behavior of the nonhydrocarbon gases. This paper presents an extension of the Soave equation to systems containing hydrogen. Because of the extremely supercritical state of hydrogen, the basic Soave procedure with interaction coefficients does not predict hydrogen K values accurately. A new temperature dependency correlation is developed for hydrogen which eliminates the need for interaction coefficients and which correlates the phase behavior of hydrogen containing systems very well. The new correlation for hydrogen is tested against available data to demonstrate its utility and is shown to be applicable to both defined and undefined systems containing hydrogen. © 1979, American Chemical Society. All rights reserved.