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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
Place of publication:Weinheim
Publishing Institution:Hochschule Bonn-Rhein-Sieg
Date of first publication:2023/05/12
Copyright:© 2023 The Authors.
Keyword:Organosolv lignin; acidic ethanosolv; autohydrolysis; condensation; depolymerization; lignin structure analysis; process parameters
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