Vapor–Liquid Equilibria of the CH<sub>4</sub> + CO<sub>2</sub> + H<sub>2</sub>S Ternary System with Two Different Global Compositions: Experiments and Modeling
Pascal Théveneau, Xiaochun Xu, Olivier Baudouin, Jean‐Noël Jaubert, Paola Ceragioli, Christophe Coquelet
Abstract
The vapor–liquid equilibrium for two mixtures containing methane, carbon dioxide, and hydrogen sulfide was determined experimentally by a static-analytic method. Thirty-one data points were acquired for a range of temperatures from 243 to 333 K at pressures up to 11 MPa. The measured data were correlated with the Peng–Robinson equation of state (EoS) and different mixing rules, which led to the conclusion that a cubic EoS could simultaneously predict the existence of a three-phase region and two critical points on the constant-composition, two-phase boundary curve.
Topics & Concepts
ThermodynamicsTernary operationPhase boundaryMethaneEquation of stateMixing (physics)Hydrogen sulfidePhase (matter)Phase equilibriumCubic functionMaterials scienceChemistryPhysicsMathematicsMathematical analysisOrganic chemistrySulfurComputer scienceProgramming languageQuantum mechanicsMetallurgyPhase Equilibria and ThermodynamicsChemical Thermodynamics and Molecular StructureThermodynamic properties of mixtures