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Hydrothermal processing of lignocellulosic materials
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Journal Article
Hydrothermal processing of lignocellulosic materials
1999
Overview
Hydrothermal processing of lignocellulosic materials (wood or agricultural residues) causes a variety of effects including extractive removal, hemicellulose hydrolysis and alteration of the properties of both cellulose and lignin.This article reviews the chemical composition of raw materials potentially useful for hydrothermal processing as well as the results reported on the kinetics of hemicellulose hydrolysis by hot water treatments. The fundamentals of mathematical modellingof hemicellulose degradation reactions by pseudohomogeneous kinetics and by severity factors are reviewed. Additional information on the effects caused by hydrothermal treatments on lignin and cellulose is also provided.
Der hydrothermische Aufschluss von Lignocellulosen (Holz und Agrarruckstande) hat mehrere Nebeneffekte wie Auslosen von Extraktstoffen, Hydrolyse der Hemicellulosen und Veranderung von Eigenschaften der Cellulose und des Lignins. Diese Arbeit gibt eine Ubersicht uber verschiedene Rohstoffe, die fur den hydrothermischen Aufschluss in Frage kommen sowie uber Ergebnisse zur Kinetik der Hydrolyse von Hemicellulosen durch Heisswasserbehandlung. Die Grundlagen der mathematischen Simulation des Polysaccharidabbaus als pseudohomogene Kinetik und mit gewichteten Einflussfaktoren werden dargestellt. Zusatzlich enthalt dieser Beitrag Informationen uber die Auswirkung der hydrothermischen Behandlung auf Lignin und Cellulose.
Publisher
Springer
