The solubilities of acetoin (3-hydroxy-2-butanone), a frequently used buttery-odor compound in super-critical carbon dioxide (SC-CO2) at several pressures and temperatures were measured in this work.The measurements were conducted in a static-analytic mode at several pressures ranging from 8 MPa to 28 MPa and four temperatures of 313.15 K, 323.15 K, 333.15 K, and 343.15 K. The equilibrium was established for 3 to 4 h. The solubilities of acetoin in SC-CO2increased with increasing both pressure andtemperature beyond the crossover pressure at 8 MPa. Two density-based models namely Chrastil and Del Valle-Aguilera and Peng-Robinson equation of state (PR-EOS) with quadratic and Stryjek-Vera mixing rules were used to represent experimental solubilities and to describe phase behavior of the system. Both Chrastil and Del Valle-Aguilera models were able to correlate experimental solubility data satisfactorily with absolute average relative deviation (AARD) of 0.27%. Similarly, the phase equilibrium behavior ofacetoin + supercritical CO2 binary system can be well interpreted by PR-EOS with quadratic (AARD of0.11%) and Stryjek-Vera mixing rules (AARD of 0.08%).
Compounds
#
Formula
Name
1
CO2
carbon dioxide
2
C4H8O2
2,3-butanolone
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
Mole fraction - 2 ; Fluid (supercritical or subcritical phases)
Temperature, K; Fluid (supercritical or subcritical phases)
Pressure, kPa; Fluid (supercritical or subcritical phases)