Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Phase behaviour for the (CO2 + 1-butyl-2-pyrrolidone) and (CO2 + 1-octyl-2-pyrrolidone) systems at temperatures from (313.2 to 393.2) K and pressures up to 28 MPa

Yim, Joon-Hyuk, Choo, Yeong-Su, Byun, Hun-Soo
J. Chem. Thermodyn. 2019, 130, 140-146
ABSTRACT
Phase equilibrium for two binary systems, (CO2 + 1-butyl-2-pyrrolidone) and (CO2 + 1-octyl-2-pyrrolidone) mixture, were measured at five experimental temperatures of (313.2, 333.2, 353.2, 373.2 and 393.2) K and pressure from (4.45 to 28.72) MPa. The (vapour + liquid) equilibria for the 1-butyl-2-pyrrolidone and 1-octyl-2-pyrrolidone play a significant role as organic solvents in numerous industrial processes. Both (CO2 + 1-butyl-2-pyrrolidone) and (CO2 + 1-octyl-2-pyrrolidone) binary mixture systems have critical mixture curves that represent maximums in pressure-temperature diagram between the critical temperatures of CO2 and 1-butyl-2-pyrrolidone or CO2 and 1-octyl-2-pyrrolidone. The (CO2 + 1-butyl-2-pyrrolidone) and (CO2 + 1-octyl-2-pyrrolidone) systems display type-I phase behaviour. The experimental results for the (CO2 + 1-butyl-2-pyrrolidone) and (CO2 + 1-octyl-2-pyrrolidone) binary systems are correlated with Peng-Robinson equation of state including two (kij, etaij) adjustable parameters.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 C8H15NO 1-butyl-2-pyrrolidone
3 C12H23NO N-octyl-2-pyrrolidone
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
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 2; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 57
  • POMD
  • 2
  • 1
  • Vapor or sublimation pressure, kPa ; Gas
  • Temperature, K; Gas
  • Mole fraction - 2; Gas
  • Gas
  • Liquid
  • Closed cell (Static) method
  • 10
  • POMD
  • 2
  • 1
  • Critical temperature, K ; Liquid
  • Mole fraction - 2; Liquid
  • Liquid
  • Gas
  • Visual observation in an unstirred cell
  • 3
  • POMD
  • 2
  • 1
  • Critical pressure, kPa ; Liquid
  • Mole fraction - 2; Liquid
  • Liquid
  • Gas
  • Direct measurement
  • 3
  • POMD
  • 3
  • 1
  • Vapor or sublimation pressure, kPa ; Liquid
  • Temperature, K; Liquid
  • Mole fraction - 3; Liquid
  • Liquid
  • Gas
  • Closed cell (Static) method
  • 67
  • POMD
  • 3
  • 1
  • Vapor or sublimation pressure, kPa ; Gas
  • Temperature, K; Gas
  • Mole fraction - 3; Gas
  • Gas
  • Liquid
  • Closed cell (Static) method
  • 6
  • POMD
  • 3
  • 1
  • Critical temperature, K ; Liquid
  • Mole fraction - 3; Liquid
  • Liquid
  • Gas
  • Visual observation in an unstirred cell
  • 2
  • POMD
  • 3
  • 1
  • Critical pressure, kPa ; Liquid
  • Mole fraction - 3; Liquid
  • Liquid
  • Gas
  • Direct measurement
  • 2