Measurement and model prediction of vapor-liquid equilibria of mixtures of rapeseed oil and supercritical carbon dioxide

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · Industrial and Engineering Chemistry Research; (USA)

DOI:https://doi.org/10.1021/ie00091a029· OSTI ID:7030916

Klein, T; Schulz, S ^[1]

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1. Lehrstuhl fur Thermodynamik, Abteilung Chemietechnik, Universitat Dortmund, D-4600 Dortmund 50 (DE)

Isothermal-vapor-liquid equilibrium data of the rapeseed oil-carbon dioxide system were measured with a vapor-recirculation apparatus at 313.15, 333.15, 353.15, and 373.15 K at pressures between 10 and 85 MPa. The solubilities of rapeseed oil in carbon dioxide were compared with solubility data of other vegetable oils from the literature. A lattice model equation of state (EOS) is used to describe the rapeseed oil-carbon dioxide system. The lattice EOS was improved by introducing a more accurate EOS for carbon dioxide (Bender EOS) into the model. With the Kumar-Bender model and a tree-binary-parameter, composition- and density-dependent combining rule proposed by Wilczek-Vera and Vera, a quantitative description of phase equilibrium is obtained. The temperature dependence of the binary parameters has been evaluated for interpolation or extrapolation purposes.

• OSTI ID: 7030916
• Journal Information: Industrial and Engineering Chemistry Research; (USA), Vol. 28:7; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CARBON DIOXIDE
EQUATIONS OF STATE
VEGETABLE OILS
SOLUBILITY
BINARY MIXTURES
CHEMICAL COMPOSITION
EQUILIBRIUM
ISOTHERMAL PROCESSES
LIQUIDS
MIXTURES
SUPERCRITICAL STATE
VAPORS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
DISPERSIONS
EQUATIONS
FLUIDS
GASES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
400201* - Chemical & Physicochemical Properties
400105 - Separation Procedures