A new isochoric apparatus was built for PVTx measurements in an extended temperature range from (210 to 360) K and at pressures up to 6.0 MPa. The set-up was used to measure PVTx properties for the R116 + CO2 and the R41 + CO2 systems, both in the two-phase and in the superheated vapor regions. The binary interaction parameters were derived from experimental data in the two-phase region, applying the flash method and the Carnahan-Starling-DeSantis equation of state (CSD EOS). The dew point parameters were found by interpolating the P-T isochoric sequences, again applying the CSD EOS. A composition-dependent mixing rule implemented in the CSD EOS improved the VLE data representation of both binary systems. The resulting binary interaction parameters were used for VLE parameter derivation. The superheated vapor region data were compared with those obtained by the Burnett method and using REFPROP 7.
Compounds
#
Formula
Name
1
CH3F
fluoromethane
2
CO2
carbon dioxide
3
C2F6
hexafluoroethane
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.