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Optimizacija utekočinjenja lesa različnih drevesnih vrst : diplomsko delo
Čuk, Nataša (Author), Tišler, Vesna (Mentor) More about this mentor... This link opens in a new window, Kunaver, Matjaž (Co-mentor), Petrič, Marko (Reviewer)

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Abstract
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.

Language:Slovenian
Keywords:les, hrast, bukev, topol, smreka, utekočinjen les, reagenti, kislinski katalizatorji
Work type:Undergraduate thesis (m5)
Tipology:2.11 - Undergraduate Thesis
Organization:BF - Biotechnical Faculty
Year:2008
Publisher:[N. Čuk]
Number of pages:IX, 68 f.
Place:Ljubljana
UDC:630*813
COBISS.SI-ID:1659529 Link is opened in a new window
Views:771
Downloads:244
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Secondary language

Language:English
Title:Wood liquefaction optimization of different wood species : univerzitetni študij
Abstract:
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.

Keywords:wood, oak, beech, poplar, spruce, wood liquefaction, reagents, acid catalysts

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