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Acid hydrolysis of lignocellulosic biomass: Sugars and furfurals formation

Świątek, Katarzyna; Gaag, Stephanie; Klier, Andreas; Kruse, Andrea; Sauer, Jörg; Steinbach, David

Abstract:
Hydrolysis of lignocellulosic biomass is a crucial step for the production of sugars and biobased platform chemicals. Pretreatment experiments in a semi-continuous plant with diluted sulphuric acid as catalyst were carried out to measure the time-dependent formation of sugars (glucose, xylose, mannose), furfurals, and organic acids (acetic, formic, and levulinic acid) at different hydrolysis temperatures (180, 200, 220° C) of one representative of each basic type of lignocellulose: hardwood, softwood, and grass. The addition of the acid catalyst is followed by a sharp increase in the sugar concentration. Xylose and mannose were mainly formed in the initial stages of the process, while glucose was released slowly. Increasing the reaction temperature had a positive effect on the formation of furfurals and organic acids, especially on hydroxymehtylfurfural (HMF) and levulinic acid, regardless of biomass type. In addition, large amounts of formic acid were released during the hydrolysis of miscanthus grass. Structural changes in the solid residue show a complete hydrolysis of hemicellulose at 180° C and of cellulose at 200° C after around 120 min reaction time. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000119586
Veröffentlicht am 29.05.2020
Originalveröffentlichung
DOI: 10.3390/catal10040437
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -Technologie (IKFT)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 17.04.2020
Sprache Englisch
Identifikator ISSN: 2073-4344
KITopen-ID: 1000119586
HGF-Programm 35.13.02 (POF III, LK 01)
Konversion
Erschienen in Catalysts
Band 10
Heft 4
Seiten Article no: 437
Schlagwörter spruce wood, beech wood, miscanthus, pretreatment, hydroxymethylfurfural, HMF, furfural, hydrolysate, glucose, xylose
Nachgewiesen in Scopus
Web of Science
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