Open AccessDensity Measurements of CO2-Expanded Liquids
Author(s) -
Larissa P. Cunico,
Charlotta Turner
Publication year - 2017
Publication title -
journal of chemical and engineering data/journal of chemical and engineering data
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.719
H-Index - 132
eISSN - 1520-5134
pISSN - 0021-9568
DOI - 10.1021/acs.jced.7b00540
Subject(s) - ethyl lactate , chemistry , ethanol , glycerol , solvent , mole fraction , molar , ethyl acetate , molar volume , organic chemistry , nuclear chemistry , chromatography , thermodynamics , medicine , physics , dentistry
Novel experimental data of density for mixtures containing CO2 + ethanol, CO2 + ethyl lactate, CO2 + glycerol + ethanol, and CO2 + glycerol + ethyl lactate at low/moderate temperatures (308 and 323 K), pressures between 5 and 30 MPa, and high amounts of the organic solvent (molar fraction x = 0.5-0.9) are presented. The chosen organic solvents (ethanol, ethyl lactate, and glycerol) are green and applicable in food industry and present different polarizabilities. The density of CO2 + ethanol increased with the increment in the molar fraction of CO2, and the opposite was observed for the mixtures of CO2 + ethyl lactate. By adding a small amount of glycerol to the mixture of CO2 + ethanol and CO2 + ethyl lactate, it was possible to increase the density even a little further. The experimental data of density were well-correlated using the Peng-Robinson equation of state (PR-EOS) combined with Péneloux volume translation