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Influence on off-gassing during storage of Scots pine wood pellets produced from sawdust with different extractive contents

Siwale, Workson and Frodeson, Stefan and Berghel, Jonas and Henriksson, Gunnar and Finell, Michael and Arshadi, Mehrdad and Jonsson, Carina (2022). Influence on off-gassing during storage of Scots pine wood pellets produced from sawdust with different extractive contents. Biomass and Bioenergy. 156 , 106325
[Research article]

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Abstract

Off-gassing and self-heating are the major challenges when it comes to transportation and storage of wood pellets. The heat generated due to self-heating poses a fire risk while off-gassing of toxic gasses such as carbon monoxide (CO) and some volatile organic compounds (VOCs) is an environmental and human health risk. With the increase in production volumes of wood pellets which has subsequently increased the amounts of wood pellets in transportation and storage, there is need to find lasting solutions to off-gassing and self-heating of wood pellets. The objective of this study was to test the off-gassing abilities of Scots pine wood pellets produced from sawdust with varying amounts of extractives. The aim is to come up with raw material pre-treatment measures so as to produce wood pellets that are not liable to off-gassing. Six (6) types of sawdust raw materials namely; fresh pine sawdust (FPS), stored pine sawdust (SPS), sawdust plus pine rosin (PRS), sawdust plus linseed oil (LOS), sawdust plus tall oil (TOS) and acetone extracted sawdust (AES) were used to produce the pellets. The produced pellets were then subjected to off-gassing tests under controlled conditions using the ECOM J2KN analyser. The concentrations of carbon monoxide, carbon dioxide and methane increased with storage time but slowed down towards the end of the nine days test period. The formation of these gasses were largely dependent on the type of extractives present in the raw material and not the total extractive content. The formation of methane started later than the other gases and coincided with the time when residual oxygen was depleted.

Authors/Creators:Siwale, Workson and Frodeson, Stefan and Berghel, Jonas and Henriksson, Gunnar and Finell, Michael and Arshadi, Mehrdad and Jonsson, Carina
Title:Influence on off-gassing during storage of Scots pine wood pellets produced from sawdust with different extractive contents
Series Name/Journal:Biomass and Bioenergy
Year of publishing :2022
Volume:156
Article number:106325
Number of Pages:7
ISSN:0961-9534
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 2 Engineering and Technology > 209 Industrial Biotechnology > Bioenergy
Keywords:Off-gassing, Carbon monoxide, Carbon dioxide, Methane, Wood extractives, Wood pellets
URN:NBN:urn:nbn:se:slu:epsilon-p-116277
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-116277
Additional ID:
Type of IDID
DOI10.1016/j.biombioe.2021.106325
ID Code:27271
Faculty:S - Faculty of Forest Sciences
Department:(S) > Department of Forest Biomaterials and Technology
Deposited By: SLUpub Connector
Deposited On:08 Mar 2022 06:25
Metadata Last Modified:08 Mar 2022 06:31

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