A Modified Solid-Liquid-Gas Phase Equation of State.

ABSTRACT: The solid-liquid-gas equation of state (SLV-EOS) is based on the initial cubic equation of state, the van der Waals equation. Since the van der Waals equation is not accurate enough to predict gas-liquid properties, SLV-EOS cannot better predict the gas-liquid properties of hydrocarbons in actual gas reservoirs. Therefore, a modified solid-liquid-gas unified equation of state was constructed inthis paper, which was developed using the material's actual critical compressibility factor Z _c. The minimum liquid-phase volume at the triple point is also introduced to limit the value of c in the equation, which effectively avoids the solution of Maxwell's equal-area rule in the solid-liquid transformation process. The model extends the classical Peng-Robinson equation of

SUBMITTER: Mo C 

PROVIDER: S-EPMC8945069 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature