Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-09-02

Journal: SEPARATION SCIENCE AND TECHNOLOGY

Included Journals: Scopus、EI、SCIE

Volume: 48

Issue: 13

Page Number: 1982-1986

ISSN: 0149-6395

Key Words: 1; 3-propanediol; AOT; phase behavior; supercritical CO2 microemulsion

Abstract: The phase behaviors of three microemulsion systems were studied in a custom-made volume-variable view cell, including the ternary system of CO2/EtOH (ethanol)/1,3-PDO (1,3-propanediol), quaternary system of CO2/EtOH/H2O/1,3-PDO and quinary system of AOT/CO2/EtOH/H2O/1,3-PDO, using 1,3-PDO as the model compound, AOT (sodium bis(2-ethylhexyl) sulfosuccinate) as surfactant and ethanol as co-solvent in the CO2 continuous phase. The phase behaviors of the AOT/CO2/EtOH/H2O/1,3-PDO quinary system were mainly discussed in the temperature range of 29.1 degrees C-44.3 degrees C and pressure range of 6.41MPa-15.95MPa. The result shows that a thermodynamically stable microemulsion can be formed by controlling the operating pressures and temperatures, which can provide basic thermodynamics data for industrial design and proper operating conditions for selectively solubilizing 1,3-PDO from dilute aqueous solution.