Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Measurement and Modeling of Vapor Liquid Equilibria for the Octane + Sulfuric Acid + Water + Ethanol System

Li, G.[Geng], Li, Z.[Zhibao]
J. Chem. Eng. Data 2013, 58, 7, 2044-2050
ABSTRACT
Octane was considered to be a potential entrainer for the recovery of spent sulfuric acid by heterogeneous azeotropic distillation. The vapor liquid equilibria (VLE) data were determined for octane + ethanol, octane + water + ethanol, and octane + sulfuric acid + water + ethanol systems at (30, 60, 90, and 101.3) kPa using the ebulliometric method. The VLE data were used to regress the electrolyte nonrandom two-liquid interaction parameters with the help of Aspen Plus for pairs: C8H18 C2H6O, C8H18 H2O, H2SO4 C2H6O, C2H6O [H3O]+:[HSO4]-, C2H6O [H3O]+:[SO4]2 , C8H18 [H3O]+:[HSO4]-, and C8H18 [H3O]+:[SO4]2 . The correlation fitted the experimental data well for all the systems. The maximum absolute deviation and average absolute deviation for temperature for the systems are 0.86 K and 0.26 K, respectively.
Compounds
# Formula Name
1 C2H6O ethanol
2 H2O water
3 C8H18 octane
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
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 4
  • POMD
  • 3
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 8
  • POMD
  • 1
  • 3
  • Boiling temperature at pressure P, K ; Liquid
  • Pressure, kPa; Liquid
  • Mole fraction - 3; Liquid
  • Liquid
  • Gas
  • Ebulliometric method (Recirculating still)
  • 92
  • POMD
  • 1
  • 3
  • 2
  • Boiling temperature at pressure P, K ; Liquid
  • Mole fraction - 3; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • quasi-ebulliometric
  • 132
  • POMD
  • 1
  • 2
  • Boiling temperature at pressure P, K ; Liquid
  • Mole fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Gas
  • OTHER::sMethod:quasi-ebulliometric
  • 8