20.500.12556/RUL-300 Optimizacija utekočinjenja lesa različnih drevesnih vrst diplomsko delo Wood liquefaction optimization of different wood species univerzitetni študij Ukvarjali smo se z optimizacijo utekočinjenja lesa različnih drevesnih vrst ob uporabi različnih reagentov in različnih kislinskih katalizatorjev. Les smo utekočinjali 2-4 ure pri temperaturi 150-180 °C. Vzorce smo odvzeli vsakih 15-30 minut, jih prefiltrirali ter določili delež suhega ostanka. Utekočinjenemu lesu bukve smo določili tudi hidroksilna števila. Rezultati so pokazali, da drevesna vrsta ne vpliva na izkoristek utekočinjenja; namreč bistvenih razlik v izkoristku utekočinjenja lesa listavcev in iglavcev ni. Med reagenti sta bila najbolj učinkovita neopentil glikol in trimetilol propan, med katalizatorji pa žveplova(VI) in p-toluensulfonska kislina. Ugotavljali smo tudi vpliv razmerja med količino lesa ter reagenta na izkoristek utekočinjenja in ugotovili, da le-ta ne vpliva na izkoristek. The thesis describes the wood liquefaction optimization of different wood species using different reagents and various acid catalysts. Wood was liquefied for 2-4 hours, at temperatures between 150-180 °C. Every 15-30 minutes a sample was taken, then filtrated, and its residue ratio calculated. Hydroxyl numbers were determined for the samples of liquefied beech wood. The results show that wood species does not effect wood liquefaction; there are no differences in liquefaction of hardwoods and softwoods. Neopentyl glycol and trimethylol propane were the most effective among reagents, while sulphuricand p-toluenesulphonic acids among acid catalysts. A rate between amount of wood and reagent was also investigated; the results show that the rate has no effect on wood liquefaction. les hrast bukev topol smreka utekočinjen les reagenti kislinski katalizatorji wood oak beech poplar spruce wood liquefaction reagents acid catalysts true false false [N. Čuk] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:24:59 2014-07-11 12:24:59 2022-07-11 10:17:22 0000-00-00 00:00:00 2008 0 Ljubljana 0 IX, 68 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*813 1659529 dn_cuk_natasa.pdf dn_cuk_natasa.pdf 1 3B3F9E71B7A4F41208A40B0C1F1FB477 2735dd299f8a17dee17aa194c31bf6c10ee3f9fcd2a0740853d602b750abbb96 5c62ce21-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/fad6d380-d208-4475-a9b3-d60d92fd68c1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132294 Biotehniška fakulteta 0 0 0