Extending a classical EOS correlation to represent solid-fluid phase equilibria

A strategy is presented for describing all the solid-fluid phase equilibria of a binary mixture, by combining a classical equation-of-state with a general mathematical artifice for the fugacity of the solid phase. As a case study, the strategy is applied to predict the solid-fluid phase equilibria of the binary mixture methane + carbon dioxide using the Soave-Redlich-Kwong equation-of-state to represent all real and hypothetical fluid phases. A system stability criterion is used to identify the slg locus, which is the intersection of the sl and sg equilibrium regions. (c) 2006 Elsevier B.V. All rights reserved.