University of Oulu

Sirviö, J. A., Mikola, M., Ahola, J., Heiskanen, J. P., Filonenko, S., & Ämmälä, A. (2023). Highly effective fractionation chemistry to overcome the recalcitrance of softwood lignocellulose. Carbohydrate Polymers, 312, 120815. https://doi.org/10.1016/j.carbpol.2023.120815

Highly effective fractionation chemistry to overcome the recalcitrance of softwood lignocellulose

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Author: Sirviö, Juho Antti1; Mikola, Marja2; Ahola, Juha2;
Organizations: 1Fibre and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
2Chemical Process Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
3Research Unit of Sustainable Chemistry, University of Oulu, P.O. Box 4300, FI-90014 Oulu, Finland
4Max Planck Institute of Colloids and Interfaces, 14424 Potsdam, Germany
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 5.3 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe20230922136183
Language: English
Published: Elsevier, 2023
Publish Date: 2023-09-22
Description:

Abstract

The efficient fractionation and thus production of individual biomass components are pivotal processes in the biorefinery concept. However, the recalcitrant nature of lignocellulose biomass, especially in the case of softwood, is one of the main obstacles to the wider application of biomass-based chemicals and materials. In this study, the use of aqueous acidic systems in the presence of thiourea was studied for the fractionation of softwood in mild conditions. Despite relatively low temperature (100 °C) and treatment times (30–90 min), notable high lignin removal efficiency (approximately 90 %) was obtained. Chemical characterization and the isolation of minor fraction of cationic, water-soluble lignin indicated that the fractionation proceed via nucleophilic addition of thiourea to lignin, resulting in dissolution of lignin in acidic water in relatively mild conditions. Besides high fractionation efficiency, both fiber and lignin fractions were obtained with bright color, significantly elevating their usability in material applications.

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Series: Carbohydrate polymers
ISSN: 0144-8617
ISSN-E: 1879-1344
ISSN-L: 0144-8617
Volume: 312
Article number: 120815
DOI: 10.1016/j.carbpol.2023.120815
OADOI: https://oadoi.org/10.1016/j.carbpol.2023.120815
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
116 Chemical sciences
Subjects:
Copyright information: © 2023 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
  https://creativecommons.org/licenses/by/4.0/