University of Oulu

Pasi Karinkanta, Ari Ämmälä, Mirja Illikainen, Jouko Niinimäki, Fine grinding of wood – Overview from wood breakage to applications, Biomass and Bioenergy, Volume 113, June 2018, Pages 31-44, ISSN 0961-9534,

Fine grinding of wood : overview from wood breakage to applications

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Author: Karinkanta, Pasi1; Ämmälä, Ari1; Illikainen, Mirja1;
Organizations: 1Fiber and Particle Engineering, P. O. Box 4300, FIN-90014 University of Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.4 MB)
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Language: English
Published: Elsevier, 2018
Publish Date: 2018-03-26


Due to its abundance, wood is the pre-eminent lignocellulosic raw material for a sustainable bioeconomy based society. Wood is widely used as fuel, construction material, and raw material in cellulose and lignocellulose based products. Besides the established uses of wood powder, like co-firing with coal and biofuel production, there are also novel uses and process applications, e.g., advanced wood-plastic composites and biochemical production are emerging for which the pulverization or fine grinding of wood is an essential pre-treatment step. Due to the tenacious nature of the wood matrix, size reduction is an energy intensive process and thermal or chemical pre-treatment may be needed to improve economy.

This paper provides a broad overview of the fine grinding of wood. First, wood breakage mechanisms and the mechanisms of size reduction are presented, followed by fine grinding techniques and wood pre-treatment methods. A comparison of the specific energy consumption of wood fine grinding in both a gaseous and liquid environment is illustrated. Additionally, examples are given of the role played by pre-treatment methods in decreasing energy consumption. The particle aspect ratio is discussed briefly. Finally, the use and requirements of wood powders in various applications are discussed.

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Series: Biomass & bioenergy
ISSN: 0961-9534
ISSN-E: 1873-2909
ISSN-L: 0961-9534
Volume: 113
Pages: 31 - 44
DOI: 10.1016/j.biombioe.2018.03.007
Type of Publication: A2 Review article in a scientific journal
Field of Science: 215 Chemical engineering
Copyright information: © 2018 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (