A1 Journal article (refereed)
Acid-catalyzed mechanocatalytic pretreatment to improve sugar release from birch sawdust : Structural and chemical aspects (2022)

Lempiäinen, H., Lappalainen, K., Mikola, M., Tuuttila, T., Hu, T., & Lassi, U. (2022). Acid-catalyzed mechanocatalytic pretreatment to improve sugar release from birch sawdust : Structural and chemical aspects. Catalysis Today, 397-399(550-561). https://doi.org/10.1016/j.cattod.2021.06.015

JYU authors or editors

Publication details

All authors or editors: Lempiäinen, Henna; Lappalainen, Katja; Mikola, Marja; Tuuttila, Tero; Hu, Tao; Lassi, Ulla

Journal or series: Catalysis Today

ISSN: 0920-5861

eISSN: 1873-4308

Publication year: 2022

Volume: 397-399

Issue number: 550-561

Publisher: Elsevier BV

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.cattod.2021.06.015

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/77505

Abstract

This study examined acid-catalyzed mechanocatalytic pretreatment of birch sawdust without a separate impregnation step. Catalyst amount and pretreatment time were the key variables. Pretreated material was mixed with water for hydrolysis (100 °C, 60 min). The efficient release of total reducing sugars from birch sawdust is significant to the path towards biofuels and biochemicals. Based on the results, the structure and surface of birch sawdust changed as a function of mechanocatalytic pretreatment. Milling time caused significant transformations in birch structure and also increased the yields of reducing sugars. The highest yield of total reducing sugar from pretreated sawdust was 23.0% after 30 min of hydrolysis with 1.0 mmol/g acid catalyst, whereas the highest glucose yield was 23.8 g/kg (1.5 mmol/g catalyst, 60 min) and the highest xylose yield was 37.5 g/kg (1.0 mmol/catalyst, 30 min). Overall, acid-catalyzed mechanocatalytic treatment seems to improve sugar yields from birch.

Keywords: biomass (industry); biorefineries; sugars; sawdust; birches; preliminary treatment; grinding; catalysis; catalysts; sulphuric acid

Free keywords: birch; mechanocatalytic pretreatment; ball milling; sulfuric acid; catalyst; sawdust

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Ministry reporting: Yes

VIRTA submission year: 2022

JUFO rating: 1