University of Oulu

Laura Schneider, Jasmiina Haverinen, Mari Jaakkola, Ulla Lassi, Pretreatment and fractionation of lignocellulosic barley straw by mechanocatalysis, Chemical Engineering Journal, Volume 327, 2017, Pages 898-905, ISSN 1385-8947,

Pretreatment and fractionation of lignocellulosic barley straw by mechanocatalysis

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Author: Schneider, Laura1,2; Haverinen, Jasmiina3; Jaakkola, Mari3;
Organizations: 1University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FIN-90014 Oulu, Finland
2University of Jyvaskyla, Kokkola University Consortium Chydenius, Talonpojankatu 2B, 67100 Kokkola, Finland
3University of Oulu, Kajaani University Consortium, Unit of Measurement Technology, FI–87400 Kajaani, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.1 MB)
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Language: English
Published: Elsevier, 2017
Publish Date: 2019-11-01


This study focuses on the mechanocatalytical process combining dilute acid pretreatment and mechanical processing driven by ball milling. Milled and hydrolyzed barley straw samples are subject to reducing sugar analysis by DNS assay and capillary electrophoresis. Optimization of the saccharification conditions was carried out with two different sulfuric acid concentrations, 0.5 mol kg⁻¹ and 1.0 mol kg⁻¹, and compared. A significant yield of total reducing sugar (53.4%) was obtained from barley straw impregnated with sulfuric acid (1.0 mol kg⁻¹) after milling for only 20 min. Glucose and xylose concentrations accounted for 3.5% and 11.3%, respectively. Strikingly, the present study indicates a significant impact of the internal milling vessel temperature in the mechanocatalytical conversion process of barley straw in addition to the mechanical parameters and the catalyst concentration.

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Series: Chemical engineering journal
ISSN: 1385-8947
ISSN-E: 1873-3212
ISSN-L: 1385-8947
Volume: 327
Pages: 898 - 905
DOI: 10.1016/j.cej.2017.06.175
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: This work was financially supported by the Fortum Foundation, Helsinki, Finland [grant number 201400052].
Copyright information: © 2017 Elsevier B.V. All rights reserved.