Izvorni znanstveni članak

Phase Equilibrium Measurements and Data Correlation for the Ternary System Oleic Acid + 1-Octanol + Carbon Dioxide

Chiara Giulia Laudani ; University of Maribor, Faculty of Chemistry and Chemical Engineering, Laboratory for Separation Processes and Product Design, Smetanova ul. 17, SI-2000 Maribor, Slovenia
Mateja Primožič ; University of Maribor, Faculty of Chemistry and Chemical Engineering, Laboratory for Separation Processes and Product Design, Smetanova ul. 17, SI-2000 Maribor, Slovenia
Željko Knez ; University of Maribor, Faculty of Chemistry and Chemical Engineering, Laboratory for Separation Processes and Product Design, Smetanova ul. 17, SI-2000 Maribor, Slovenia
Maja Habulin ; University of Maribor, Faculty of Chemistry and Chemical Engineering, Laboratory for Separation Processes and Product Design, Smetanova ul. 17, SI-2000 Maribor, Slovenia

Sažetak

A study of the high-pressure phase equilibria in the ternary system oleic acid/1-octanol/supercritical CO₂ was performed to obtain information for optimization of enzymatic synthesis of n-octyl oleate. Equilibrium data were measured at temperatures of 308.15, 323.15 and 343.15 K over a pressure range from 1 to 25 MPa. Two different apparatuses: a Variable Volume View Cell and a Batch Stirred Tank were used employing synthetic and static-analytic measurement methods, respectively. The measured solubility of dense CO₂ in the binary liquid mixture oleic acid/1-octanol covered the range from 0.0781 to 0.7686 of CO₂ molar fraction. CO₂ solubility increased with increasing pressure up to 10 MPa. At higher pressures, no significant increase was observed. The Soave-Redlich-Kwong equation-of-state (SRK-EoS) with quadratic mixing rules was successfully used for data correlation in the whole P-T-x region studied.

Ključne riječi

data correlation; 1-octanol; oleic acid; supercritical carbon dioxide; Soave-Redlich-Kwong equation-of-state; vapor-liquid equilibria

Hrčak ID:

45616

URI

https://hrcak.srce.hr/45616

Datum izdavanja:

20.12.2009.

Posjeta: 2.317 *