Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Measurement of gas mixing volumes by Flux Response Technology

Riesco, N., Mason, G., Cumming, I. W., Russell, P. A., Hellgardt, K.
Fluid Phase Equilib. 2007, 256, 1-2, 93-98
Flux Response Technology is a technique based on a capillary viscometer for the measurements of flow and viscosity changes. In previous works, it has been used to measure logarithmic viscosity gradients of ideal mixtures. Here, we extend its range of application to the measurement of non-ideal mixing volumes at low temperatures. The theory describing a Flux Response apparatus has been reformulated without assuming gas ideality and taking into account the mixing volume. A systematic error in the measurement of the viscosity has been identified and estimated. We report the excess volume measurements of CO2 + CCl2F2 mixtures obtained at 273.15K and 1.11 bar.
# Formula Name
1 CO2 carbon dioxide
2 CCl2F2 dichlorodifluoromethane
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
  • 2
  • 1
  • Excess molar volume, m3/mol ; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Flux Response Technology (based on capillary viscometry)
  • 14