Chiara Giulia Laudani (Author), Mateja Primožič (Author), Željko Knez (Author), Maja Leitgeb (Author)

Abstract

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.

Keywords

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

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
UDC: 543.3:544.4
COBISS: 13944598 Link will open in a new window
ISSN: 0011-1643
Views: 965
Downloads: 90
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Other data

Secondary title: Fazne ravnoteže i korelacija podataka za ternarni sustav oleinska kiselina + 1-oktanol + ugljikov dioksid
Secondary abstract: Kako bi se dobili podaci potrebni za optimalizaciju enzimske sinteze n-oktil-oleata, proučavane su fazne ravnoteže u sustavu: oleinska kiselina + 1-oktanol + ugljikov dioksid, i to pri temperaturama od 309,15 K, 323,15 K i 343,15 K te pri tlakovima u rasponu od 1 MPa do 25 MPa, služeći se sintetičkim i statičko-analitičkim metodama. Topljivost ugljikova dioksida u tekućim binarnim smjesama oleinske kiseline i 1-oktanola raste s povećanjem tlaka sve do 10 MPa. Za korelaciju mjernih podataka uspješno je primijenjena jednadžba stanja Suave-Redlich-Kwong (s kvadratnim pravilima miješanja), u cijelomu području istraživanih parametara p-T-x.
Secondary keywords: korelacija podatkov;1-oktanol;oleinska kislina;superkritični ogljikov dioksid;Soave-Redlich-Kwongova enačba stanja;ravnotežje para-tekočina;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 761-769
Volume: ǂVol. ǂ82
Issue: ǂno. ǂ4
Chronology: 2009
ID: 10846970