Vapor-Liquid Equilibria, Solid-Vapor-Liquid Equilibria and H2S Partition Coefficient in (CO2 + CH4) at Temperatures Between (203.96 and 303.15) K at Pressures up to 9 MPa

Type Article
Date 2020-11
Language English
Author(s) Souza Lorena F.S.1, Ghafri Saif Z.S. Al1, 2, Fandino Torres OliviaORCID3, Martin Trusler J.P.1
Affiliation(s) 1 : Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom
2 : Fluid Science and Resources Division, Department of Chemical Engineering, University of Western Australia, Crawley, WA 6009, Australia
3 : Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Centre de Bretagne, Département Ressources Physiques et Ecosystèmes de Fond de Mer, Unité des Géosciences Marines, 29280 Plouzané, France
Source Fluid Phase Equilibria (0378-3812) (Elsevier BV), 2020-11 , Vol. 522 , P. 112762 (13p.)
DOI 10.1016/j.fluid.2020.112762
WOS© Times Cited 1
Keyword(s) Carbon capture, Transport and storage, Carbon dioxide, Equation of state, Methane, Vapor-liquid equilibrium, Phase behavior
Abstract

Vapor-liquid equilibrium (VLE) measurements of the (CO2 + CH4) system are reported along seven isotherms at temperatures varying from just above the triple point to just below the critical point of CO2 at pressures from the vapor pressure of pure CO2 to approximately 9 MPa, including near-critical states. From these data, the critical locus has been determined and correlated over its entire length. The VLE data are correlated with the Peng-Robinson equation of state (PR-EoS), using a temperature-dependent binary interaction parameter, and also compared with the predictions of the GERG-2008 equation of state. The former represents the phase compositions across all isotherms with a root-mean-square mole-fraction deviation of S = 0.0075 while, for the latter, S = 0.0126. Measurements of the three-phase solid-vapor-liquid equilibrium (SVLE) line are reported at temperatures from approximately (204 to 216) K and a new correlation is developed which is valid from 145 K to the triple point of CO2. Additionally, we report the partitioning of trace levels of H2S between coexisting liquid and vapor phases of the (CO2 + CH4) system and compare the results with the predictions of the PR-EoS.

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Souza Lorena F.S., Ghafri Saif Z.S. Al, Fandino Torres Olivia, Martin Trusler J.P. (2020). Vapor-Liquid Equilibria, Solid-Vapor-Liquid Equilibria and H2S Partition Coefficient in (CO2 + CH4) at Temperatures Between (203.96 and 303.15) K at Pressures up to 9 MPa. Fluid Phase Equilibria, 522, 112762 (13p.). Publisher's official version : https://doi.org/10.1016/j.fluid.2020.112762 , Open Access version : https://archimer.ifremer.fr/doc/00642/75387/