Optimizacija utekočinjenja lesa različnih drevesnih vrst : diplomsko delo

Čuk, Nataša (author), Tišler, Vesna (mentor), Kunaver, Matjaž (comentor), Petrič, Marko (reviewer)

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
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [N. Čuk]
• Year: 2008
• Number of pages: IX, 68 f.
• PID: 20.500.12556/RUL-300
• UDC: 630*813
• COBISS.SI-ID: 1659529
• Publication date in RUL: 11.07.2014

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