Naslov
Kinetic characterisation of enzymatic esterification in a solvent system : adsorptive control of water with molecular sieves

Autori
Giacometti, Jasminka ; Giacometti, Fabio ; Milin, Čedomila ; Vasić-Rački, Đurđa

Izvornik
Journal of molecular catalysis. B, Enzymatic (1381-1177) 11 (2001), 4-6; 921-928

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
lipase-catalyzed esterification; long-chain fatty acid esters; molecular sieves; n-hexane; reaction kinetics

Sažetak
The kinetics of enzymatic esterification of glycerol with oleic acid, in equimolar ratio, catalyzed by immobilized Mucor miehei lipase in a solvent system in the presence of the molecular sieves was carried out at 37oC at different Lipozym and solvent (n-hexane) concentrations and the molecular sieve contents were studied in a batch stirred-tank reactor (BSTR). The reactions were followed by the determination of reaction conversions during 45 hrs. The experimental data of enzymatic esterification of glycerol with oleic acid in a solvent system in the presence of molecular sieves showed minimal deviation from the calculated value in the irreversible second order kinetic model. On the basis of the experimental data we found an empirical correlation between concentrations of Lipozym, concentrations of solvent (n-hexane), contents of the molecular sieve and the reaction rate constant k1.

Izvorni jezik
Engleski

Znanstvena područja
Farmacija, Prehrambena tehnologija

Napomena
Rad je prezentiran na skupu 4th International Symposium on Biocatalysis, održanom od 26.09.-01.10.1999.g., Giardini Naxos, Italija ; S. Riva, S. Serv (ur.).

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