Thermodynamics Research Center / ThermoML | Thermochimica Acta

Densities of CO2/N2/O2 ternary mixtures at temperatures from (300.15 to 353.15) K and pressures from (5 to 18) MPa

Zhao, C.[Changzhong], Lv, J.[Junchen], Li, G.[Guanchu], Zhang, Q.[Qian], Zhang, Y.[Yi], Liu, S.[Shuyang], Chi, Y.[Yuan]
Thermochim. Acta 2019, 676, 20-26
ABSTRACT
As a thermodynamic property, the density of CO2 mixtures plays an important role on carbon capture and storage. The densities of two CO2/N2/O2 ternary mixtures were measured at temperatures from (300.15 353.15) K and pressures from (5-18) MPa using a high-precision magnetic suspension balance. The temperature and pressure uncertainties were 0.01 K and 0.005 MPa, respectively. The density measurement uncertainty was estimated as 0.138 kg*m-3. Impurities decreased the density of pure CO2 and the more the impurities were, the larger the reduction was. The densities of mixtures were calculated using GERG-2008 EOS and compared with experimental data. When the temperature and pressure were far away from the critical region, the discrepancy between the experimental data and GERG-2008 EOS calculations was small.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 N2 nitrogen
3 O2 oxygen
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • 3
  • Mass density, kg/m3 ; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Mole fraction - 2; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Buoyancy - hydrostatic balance with magnetic suspension - one sinker
  • 120