20.500.12556/DKUM-27685 Silica aerogels as support for lipase catalyzed esterifications at sub- and supercritical conditions 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. chemical processing biotechnology esterification immobilization of enzymes supercritial CO2 propane lipases supercritical CO2 drying kemijska procesna tehnika biotehnologija esterifikacija imobilizacija encimov superkritični CO2 lipaze superkritično CO2 sušenje true false false Angleški jezik Angleški jezik Neznano 2012-06-01 11:59:38 2012-06-01 11:59:38 2022-04-15 03:45:23 2019-07-10 12:20:16 2003 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.095.1 8156950 0896-8446 URN:SI:UM:DK:3MZ1ABZP http://dx.doi.org/10.1016/S0896-8446(02)00233-4 1 https://dk.um.si/Dokument.php?lang=slv&id=37002 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0