The phase equilibrium and density studies of the ternary mixtures of CO2 + Ar + N2 and CO2 + Ar + H2, systems relevance to CCS technology

Ke, Jie and Suleiman, Norhidayah and Sanchez-Vicente, Yolanda and Murphy, Thomas S. and Rodriguez, Javier and Ramos, Alfredo and Poliakoff, Martyn and George, Michael W. (2017) The phase equilibrium and density studies of the ternary mixtures of CO2 + Ar + N2 and CO2 + Ar + H2, systems relevance to CCS technology. International Journal of Greenhouse Gas Control, 56 . pp. 55-66. ISSN 1750-5836

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Abstract

The p-T phase diagrams of two ternary systems (CO2 + Ar + N2 and CO2 + Ar + H2) have been measured at temperatures between 268 and 303 K using a fibre-optic phase equilibrium analyser. CO2, which is the major component, has a mole fraction ranging from 0.90 to 0.98 in both systems. The molar ratio of the two minor components is Ar:N2 = 1:1 and Ar:H2 = 2:3, respectively for the two ternary systems. In addition, the density of a ternary mixture with xAr = 0.050 and xN2 = 0.050 is reported at 293.15 K, 303.15 K, 313.15 and 333.15 K and pressures up to 23 MPa. The new experimental phase equilibrium and density data have also been used to evaluate the GERG-2008/EOS-CG, gSAFT and Peng-Robinson equations of state. Among these equations, EOS-CG exhibits the best predictions on both the p-T phase diagrams and densities of CO2 + Ar + N2; and gSAFT gives the lowest average absolute deviation between the predicted and the measured bubble-point pressures of CO2 + Ar + H2.

Item Type: Article
Keywords: Carbon capture and storage, Carbon dioxide, Argon, Nitrogen, Hydrogen, Vapour-liquid equilibrium, Density, Equation of state
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Chemistry
Identification Number: 10.1016/j.ijggc.2016.11.003
Depositing User: Smith, Ruth
Date Deposited: 11 Sep 2017 14:24
Last Modified: 11 Sep 2017 17:46
URI: http://eprints.nottingham.ac.uk/id/eprint/45705

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