4.5 Article

Phase equilibria for H2+CO2+H2Osystem containing gas hydrates

Journal

FLUID PHASE EQUILIBRIA
Volume 233, Issue 2, Pages 190-193

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.fluid.2005.05.006

Keywords

gas hydrate; solid-fluid equilibria; gas putification; Raman spectroscopy; hydrogen; carbon dioxide

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Isothermal phase equilibrium (pressure-composition in the gas phase) for the ternary system of H-2 + CO2 + H2O has been investigated in the presence of gas hydrate phase. Three-phase equilibrium pressure increases with the H-2 composition of gas phase. The Raman spectra suggest that H-2 is not enclathrated in the hydrate-cages and behaves only like the diluent gas toward the formation of CO2 hydrate. This fact is also supported by the thermodynamic analysis using Soave-Redlich-Kwong equation of state. (c) 2005 Elsevier B.V. All rights reserved.

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