Phase behavior of (CO2 + H-2) and (CO2+ N-2) at temperatures between (218.15 and 303.15)K at pressures up to 15 MPa
File(s)
Accepted version
Author(s)
Fandiño, O
Trusler, JPM
Vega-Maza, D
Type
Journal Article
Abstract
Vapor–liquid equilibrium data are reported for the binary systems (CO2 + H2) and (CO2 + N2) at temperatures between (218.15 and 303.15) K at pressures ranging from the vapor pressure of CO2 to approximately 15 MPa. These data were measured in a new analytical apparatus which is described in detail. The results are supported by a rigorous assessment of uncertainties and careful validation measurements. The new data help to resolve discrepancies between previous studies, especially for the (CO2 + H2) system. Experimental measurements of the three-phase solid–liquid–vapor locus are also reported for both binary systems.
The vapor–liquid equilibrium data are modeled with the Peng–Robinson (PR) equation of state with two binary interaction parameters: one, a linear function of inverse temperature, applied to the unlike term in the PR attractive-energy parameter; and the other, taken to be constant, applied to the unlike term in the PR co-volume parameter. This model is able to fit the experimental data in a satisfactory way except in the critical region. We also report alternative binary parameter sets optimized for improved performance at either temperatures below 243 K or temperatures above 273 K. A simple predictive model for the three-phase locus is also presented and compared with the experimental data.
The vapor–liquid equilibrium data are modeled with the Peng–Robinson (PR) equation of state with two binary interaction parameters: one, a linear function of inverse temperature, applied to the unlike term in the PR attractive-energy parameter; and the other, taken to be constant, applied to the unlike term in the PR co-volume parameter. This model is able to fit the experimental data in a satisfactory way except in the critical region. We also report alternative binary parameter sets optimized for improved performance at either temperatures below 243 K or temperatures above 273 K. A simple predictive model for the three-phase locus is also presented and compared with the experimental data.
Date Issued
2015-03-10
Date Acceptance
2015-02-16
Citation
International Journal of Greenhouse Gas Control, 2015, 36, pp.78-92
ISSN
1750-5836
Publisher
Elsevier
Start Page
78
End Page
92
Journal / Book Title
International Journal of Greenhouse Gas Control
Volume
36
Copyright Statement
© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Technology
Energy & Fuels
Engineering, Environmental
Engineering
Carbon capture
Carbon dioxide
Hydrogen
Nitrogen
Solid-vapor-liquid equilibrium
Vapor-liquid equilibrium
VAPOR-LIQUID-EQUILIBRIA
PLUS CARBON-DIOXIDE
THERMODYNAMIC PROPERTIES
HIGH-PRESSURES
NITROGEN
SYSTEM
HYDROGEN
METHANE
MPA
TEMPERATURES
Publication Status
Published