Green Milling of Biomass and Implications for Conversion Processes, 2021 PEERS Conference (21PEE04)

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.

TAPPI conference proceedings and presentations, technical papers, and publication articles provide technical and management data and solutions on topics covering the Pulp, Paper, Tissue, Corrugated Packaging, Flexible Packaging, Nanotechnology and Converting Industries.

Simply select the quantity, add to your cart and your conference paper, presentation or article will be available for immediate download.

Author: Atanu Kumar Das; David A. Agar; Mikael Thyrel; Sylvia H. Larsson; and Magnus Rudolfsson
Green Milling of Biomass and Implications for Conversion Pro
Green Milling of Biomass and Implications for Conversion Processes, 2021 PEERS Conference (21PEE04)

New Releases

TAPPI PRESS Catalog eBook 2024

Experience the Power of Publications in the 2024 TAPPI Press Catalog



Kraft Recovery Boilers, Third Edition  

Sponsored by the Recovery Boiler Program R&D Subcommittee of the American Forest & Paper Association (AF&PA) and published by TAPPI Press.



Handbook For Pulp and Paper Technologists (The SMOOK Book), Fourth Edition

The best-selling text to introduce the entire technology of pulp and paper manufacture.



Guidelines for Safe Assessment and Operation of Yankee Dryers  

A project of the Yankee Dryer Safety & Reliability Committee.



Check our newest additions.

TAPPI Press offers some of the most in-depth resources and references for the forest products and related industries. 

See More


Available for Purchase – Conference Proceedings

TAPPI maintains a record of key conference papers, presentations, and other conference publications, available for purchase in a variety of formats.

See More