Thermodynamics Research Center, ThermoML : Journal of Chemical and Engineering Data

P-r-T Data and Derivative Properties of 3-Methylpentane, 2,4-Dimethylpentane, and 2,3,4-Trimethylpentane from 283.15 to 363.15 K at Pressures up to 65 MPa

Guerrero-Zarate, D.[David], Iglesias-Silva, G. A.[Gustavo A.], Estrada-Baltazar, A.[Alejandro]
J. Chem. Eng. Data 2019, 64, 12, 6020-6030
ABSTRACT
In this work, we present densities at high pressures of three branched hydrocarbons: 3methylpentane, 2, 4-dimethylpentane and 2,3,4-trimethylpentane from (283.15 to 363.15) K and at pressures up to 65 MPa. We have used a vibrating tube densimeter along with the Forced Path Calibration Method (FPMC). This method considers mechanical properties of the cell and allows us to reach standard uncertainties less than 0.0004 g/cm3. For 3-methylpentane, the new density data agree within 0.2% with densities from the literature. For the case of 2,4-dimethylpentane and 2,3,4-trimethylpentane densities at high pressures have not been reported in the literature. Isobaric expansibility and isothermal compressibility are calculated using an equation of state correlated to the experimental density data. KEYWORDS: high-pressure density, branched alkanes, isothermal compressibility, isobaric expansibility.
Compounds
# Formula Name
1 C6H14 3-methylpentane
2 C7H16 2,4-dimethylpentane
3 C8H18 2,3,4-trimethylpentane
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
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 230
  • POMD
  • 2
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 234
  • POMD
  • 3
  • Mass density, kg/m3 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 238