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Beyond Yield Optimization: The Impact of Organosolv Process Parameters on Lignin Structure

  • When optimizing the process parameters of the acidic ethanolic organosolv process, the aim is usually to maximize the delignification and/or lignin purity. However, process parameters such as temperature, time, ethanol and catalyst concentration, respectively, can also be used to vary the structural properties of the obtained organosolv lignin, including the molecular weight and the ratio of aliphatic versus phenolic hydroxyl groups, among others. This review particularly focuses on these influencing factors and establishes a trend analysis between the variation of the process parameters and the effect on lignin structure. Especially when larger data sets are available, as for process temperature and time, correlations between the distribution of depolymerization and condensation reactions are found, which allow direct conclusions on the proportion of lignin's structural features, independent of the diversity of the biomass used. The newfound insights gained from this review can be used to tailor organosolv lignins isolated for a specific application.

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Document Type:Article
Author:Jonas Bergrath, Jessica Rumpf, René Burger, Xuan Tung Do, Michaela Wirtz, Margit Schulze
Parent Title (English):Macromolecular Materials and Engineering
Article Number:2300093
Number of pages:18
Place of publication:Weinheim
Publishing Institution:Hochschule Bonn-Rhein-Sieg
Date of first publication:2023/05/12
Copyright:© 2023 The Authors. Macromolecular Materials and Engineering published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License.
Funding:Financial support was given by the BMBF (grant no. 13FH102PX8) and EFRE/NRW (grant no. EFRE 0500035). J.R. gratefully acknowledges a scholarship given by the Graduate Institute of the Bonn-Rhein-Sieg University of Applied Sciences. Open access funding enabled and organized by Projekt DEAL.
Keyword:acidic ethanosolv; autohydrolysis; condensation; depolymerization; lignin structure analysis; organosolv lignin; process parameters
Departments, institutes and facilities:Fachbereich Angewandte Naturwissenschaften
Institut für Technik, Ressourcenschonung und Energieeffizienz (TREE)
Projects:BiopolymerModell - FHprofUnt 2018: Neuer Zugang zur Analyse von Biopolymeren: Kombination experimenteller Methoden mit chemometrischer Modellierung (DE/BMBF/13FH102PX8)
Biobasierte Produkte (EFRE/0500035)
Dewey Decimal Classification (DDC):5 Naturwissenschaften und Mathematik / 57 Biowissenschaften; Biologie / 570 Biowissenschaften; Biologie
Open access funding:Hochschule Bonn-Rhein-Sieg / Graduierteninstitut
Hochschule Bonn-Rhein-Sieg / Publikationsfonds / 2022 ff
Deutsche Forschungsgemeinschaft / DFG Förderung Open Access Publikationskosten 2023 - 2025
Entry in this database:2023/05/16
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International