Pretvorba sladkorjev, pridobljenih iz lignocelulozne biomase, in vpliv nečistoč na selektivno dehidracijo ksiloze in glukoze

Kremžar, Petra (author), Likozar, Blaž (mentor), Urbič, Tomaž (co-mentor)

Ta študija se osredotoča na pretvorbo biomase z dehidracijo ksiloze in glukoze iz lignocelulozne biomase v prisotnosti nečistoč NaCl in vanilina. Za razliko od prejšnjih enofaznih vodnih sistemov je bil uporabljen dvofazni sistem iz vodne in organske metil izobutil ketonske (MIBK) faze. Iskali smo optimalne pogoje za pretvorbo glukoze in ksiloze v 5-hidroksimetilfurfural (HMF) ali furfural, z optimizacijo hitrosti mešanja in temperature. Preučevan je bil vpliv vanilina in NaCl na enofazne sisteme, ki razkrivajo zaviranje vanilina tako na pretvorbo ksiloze kot glukoze ter katalitični (ksiloza) ali zaviralni (glukoza) učinek NaCl. Primerjava med eno- in dvofaznimi sistemi je bila izvedena v realnih pogojih s hemicelulozo in rezultati kažejo na potencialne koristi slednjih. Ta raziskava pospešuje okolju prijaznejši dvofazni proces, ki obeta prehod z laboratorijskega na industrijsko merilo.

• Language: Slovenian
• Keywords: Lignocelulozna biomasa, pretvorba biomase, dvofazni sistem, ksiloza, glukoza, HMF, furfural, optimizacija reakcijskih pogojev
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2023
• PID: 20.500.12556/RUL-149411
• COBISS.SI-ID: 167912195
• Publication date in RUL: 07.09.2023

Secondary language

• Language: English
• Title: Conversion of lignocellulosic biomass derived saccharides; effect of impurities on selective xylose and glucose dehydration

Abstract

This study focuses on upgrading biomass by dehydrating xylose and glucose from lignocellulose biomass in the presence of impurities NaCl and vaniline. Unlike previous single-phase water systems, we explore a two-phase water and organic, methyl isobutyl ketone (MIBK), system. Optimal conditions for glucose and xylose conversion to 5-hydroxymethylfurfural (HMF) or furfural are sought through mixing speed and temperature optimization. The impact of vanillin and NaCl on single-phase systems is investigated, revealing vanillin's inhibition of both xylose and glucose transformation and NaCl's catalytic (xylose) or inhibitory (glucose) effect. A comparison between single and two-phase systems in realistic conditions was performed with hemicellulose and the results indicate potential benefits of the latter. This research accelerates the environmentally friendlier two-phase process, holding promise for scaling from lab to industry.

• Keywords: Lignocellulosic biomass, biomass conversion, two-phase system, xylose, glucose, HMF, furfural, reaction optimisation