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Green Milling of Biomass and Implications for Conversion Processes
SLU Swedish University of Agricultural Sciences, Sweden.ORCID iD: 0000-0003-2661-7802
Swedish University of Agricultural Sciences, Sweden.ORCID iD: 0000-0002-5900-9806
Swedish University of Agricultural Sciences, Sweden.
Swedish University of Agricultural Sciences, Sweden.
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2021 (English)In: 2021 PEERS Conference (21PEE04), 2021Conference paper, Published paper (Refereed)
Abstract [en]

The quality of biomass powders depends on the size reduction technology used to produce them. Attritional mills (e.g. hammer mills) require biomass that is chipped and pre-dried. These processes degrade the green chemical profile of biomass and complicate handling and storage. A multi-blade shaft mill (MBSM) produces fine powders in a single step from green biomass. This enhances utilisation in downstream biorefining processes. Investigations have evaluated the powder quality and the energy requirements of MBSM milling using pinewood at a range of moisture contents. The shape and size properties of powders were analysed using two-dimensional image analysis and surface features investigated by scanning electron microscopy. A higher fraction (55 to 80 %) of finer powders (< 0.5 mm) was observed through multi-blade milling in comparison to hammer milling (41 %). There were also significant differences in particle (MBSM powders produced from green logs) aspect ratios (0.54 to 0.58 vs. 0.36 to 0.43) and specific surface (33 to 56 mm-1 vs. 29 to 38 mm-1). The MBSM specific milling energy ranged from 99 to 232 kWh t−1 (dry mass (DM)). These results are promising for the conversion of biomass powders into value added products (e.g. bio-based chemicals and nanocellulose) and indicate that MBSM technology may have a niche application in biorefining.

Place, publisher, year, edition, pages
2021.
National Category
Bioenergy
Identifiers
URN: urn:nbn:se:ri:diva-74566OAI: oai:DiVA.org:ri-74566DiVA, id: diva2:1881749
Conference
2021 PEERS Conference (21PEE04)
Available from: 2024-07-03 Created: 2024-07-03 Last updated: 2024-08-15Bibliographically approved

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https://imisrise.tappi.org/TAPPI/Products/21/PEE/21PEE04.aspx

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Das, Atanu Kumar

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CiteExportLink to record
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Citation style
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