An experimental setup for isobaric heat capacities for viscous fluids at high pressure: Squalane, bis(2-ethylhexyl) sebacate and bis(2-ethylhexyl) phthalate
Lugo, L., Segovia, J. J., Martin, M. C., Fernandez, J., Villamanan, M. A.
A high-pressure flow calorimeter has been used to determine highly accurate isobaric heat capacities for different viscous fluids, squalane (SQN), bis(2-ethylhexyl) sebacate (DEHS) and bis(2-ethylhexyl) phthalate (DEHP) from T = (293.15 to 353.15) K and up to 30 MPa. The experimental device was adapted for viscous liquids at high pressure and it can measure heat capacities with an estimated total uncertainty better than 1%. The isobaric heat capacity values were analysed together with their temperature and pressure dependences. In addition, a fitting equation of the experimental molar isobaric heat capacity for these viscous fluids as a function of temperature and pressure was proposed.
Compounds
#
Formula
Name
1
C30H62
2,6,10,15,19,23-hexamethyltetracosane
2
C24H38O4
bis(2-ethylhexyl) 1,2-benzenedicarboxylate
3
C26H50O4
bis(2-ethylhexyl) decanedioate
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
Molar heat capacity at constant pressure, J/K/mol ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Flow calorimetry
16
POMD
2
Molar heat capacity at constant pressure, J/K/mol ; Liquid
Temperature, K; Liquid
Pressure, kPa; Liquid
Liquid
Flow calorimetry
16
POMD
3
Molar heat capacity at constant pressure, J/K/mol ; Liquid