University of Oulu

Yue Dong, Jasmiina Haverinen, Tero Tuuttila, Mari Jaakkola, Jana Holm, Jean Marc Leveque, Ulla Lassi, Rapid one-step solvent-free acid-catalyzed mechanical depolymerization of pine sawdust to high-yield water-soluble sugars, Biomass and Bioenergy, Volume 102, July 2017, Pages 23-30, ISSN 0961-9534, (

Rapid one-step solvent-free acid-catalyzed mechanical depolymerization of pine sawdust to high-yield water-soluble sugars

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Author: Dong, Yue1,2; Haverinen, Jasmiina3; Tuuttila, Tero4,2;
Organizations: 1University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FI-90014 Oulu, Finland
2Centria University of Applied Sciences, FI-67100, Kokkola, Finland
3University of Oulu, Unit of Measurement Technology, P.O. Box 127, FIN-87400, Kajaani, Finland
4University of Jyvaskyla, Kokkola University Consortium Chydenius, FI-67100 Kokkola, Finland
5Univ. Savoie Mont Blanc, LCME, F-73000 Chambéry, France
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.2 MB)
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Language: English
Published: Elsevier, 2017
Publish Date: 2019-07-02


One-step absolute solvent-free acid-catalyzed mechanical depolymerization of pine sawdust (PSD) and commercially available α-cellulose to water-soluble sugars was carried out using ball milling. For comparison purposes, the commonly reported “solvent-free” mechanocatalytic depolymerization of lignocellulose method, which normally involves three steps (acid impregnation in solvent, vacuum drying, and mechanical depolymerization of lignocellulose), was performed. The 3,5-dinitrosalicylic acid (DNS) method was used to measure the total reducing sugar (TRS) of the obtained sugar solution, and major monosaccharides in the solution were analyzed by capillary electrophoresis (CE). More than 90% of the PSD became water-soluble through milling. Furthermore, most of the PSD was converted into TRS in approximately 30 min, and the highest TRS yield obtained was 31%, based on the dry mass. Interestingly, the TRS solutions obtained from the processed PSD were much darker than those obtained from α-cellulose due to the chromophores that formed during the depolymerization of lignin.

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Series: Biomass & bioenergy
ISSN: 0961-9534
ISSN-E: 1873-2909
ISSN-L: 0961-9534
Volume: 102
Pages: 23 - 30
DOI: 10.1016/j.biombioe.2017.03.026
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: This research work was financially supported by the PREBIO project (EU, regional fund A70594). Yue Dong gratefully acknowledges the Finnish Central Ostrobothnia Regional Fund (0116947-3) for a personal grant.
Copyright information: © 2017 Elsevier Ltd. All rights reserved. Published in this repository with the kind permission of the publisher.