Zoran Novak (Avtor), Maja Leitgeb (Avtor), Vlasta Krmelj (Avtor), Željko Knez (Avtor)

Povzetek

The enzymes (lipases from Candida rugosa and porcine pancreas) were immobilized on silica aerogels by sol-gel procedure followed by supercritical drying with CO2. Such immobilized enzymes were used as biocatalysts for esterification in supercritical CO2 and near critical propane at 40 °C and 100 bar. It was found out that the initial reaction rates in propane rose two to three times in comparison with the same reaction, catalyzed by free lipase. SC CO2 deactivated the non-immobilized lipase in reaction mixture while with the immobilized enzyme the conversion was 35%. The initial reaction rates in propane were 20 times higher than in water medium due to the properties of propane as a medium for esterification of fatty acids.

Ključne besede

kemijska procesna tehnika;biotehnologija;esterifikacija;imobilizacija encimov;superkritični CO2;lipaze;superkritično CO2 sušenje;chemical processing;biotechnology;esterification;immobilization of enzymes;supercritial CO2;propane;lipases;supercritical CO2 drying;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK: 66.095.1
COBISS: 8156950 Povezava se bo odprla v novem oknu
ISSN: 0896-8446
Št. ogledov: 1416
Št. prenosov: 22
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarne ključne besede: kemijska procesna tehnika;biotehnologija;esterifikacija;imobilizacija encimov;superkritični CO2;lipaze;superkritično CO2 sušenje;
URN: URN:SI:UM:
Strani: str. 169-178
Letnik: ǂVol. ǂ27
Zvezek: ǂiss. ǂ2
Čas izdaje: 2003
ID: 8718849