Experimental Analysis of Mass Loss Kinetics During Heat Treatment of Wood
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F20%3A43918173" target="_blank" >RIV/62156489:43410/20:43918173 - isvavai.cz</a>
Result on the web
<a href="http://www.swst.org/wp/wp-content/uploads/2020/07/SWST-2020-Proceedings-Final-final-final.pdf" target="_blank" >http://www.swst.org/wp/wp-content/uploads/2020/07/SWST-2020-Proceedings-Final-final-final.pdf</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Experimental Analysis of Mass Loss Kinetics During Heat Treatment of Wood
Original language description
The mass loss kinetics during heat treatment of selected wood species was experimentally analyzed. European beech (Fagus sylvatica L.), English oak (Quercus robur L.), Norwegian spruce (Picea abies L. Karst.) and Scots pine (Pinus sylvestris L.) wood specimens were heat treated at 140oC, 160oC, 180oC, 200oC and 220oC for 1 to 6 hours using atmospheric pressure and superheated steam environment. The process intensity was determined by mass loss (ML), based on oven-dry mass before and after the heat treatment. Furthermore, the equilibrium moisture content (EMC) was determined before and after heat treatment to analyze the effect of mass loss on the sorption properties. For the studied wood species, the ML was found to be less than 1-1.5% when temperature of 140oC and 160oC was applied. Differences between studied species were more significant at temperatures higher than 160oC. At higher temperature (220oC) a mass loss attained of 13.5% (beech), 18.8% (oak), 6.7% (spruce) and 13.5% (pine). The EMC was reduced after heat treatment within the range of 4 - 48%, 0.4 - 47%, 1 - 32% and 0.7 - 40% for beech, oak, spruce and pine, respectively. The reason for the decrease of the EMC is that less water is absorbed by the cell wall after the heat treatment as a result of chemical compounds degradation with a decrease of hydroxyl (OH-) groups. Further, the EMC correlates exponentially (R2=0.91-0.95) with the decrease of specimens' mass depending on the used wood species and modification temperature applied. This study provides experimental mass loss results of various heat treated wood species and obtained data can be used for heat treatment process optimization as well as for the modeling and prediction of the mass loss and required material properties (EMC) for designed wooden products.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20502 - Paper and wood
Result continuities
Project
<a href="/en/project/GJ19-25171Y" target="_blank" >GJ19-25171Y: Multi-scale Hygro-thermo-mechanical Behavior of Modified Wood-based Materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 2020 Society of Wood Science and Technology International Convention
ISBN
978-1-73404-850-6
ISSN
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e-ISSN
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Number of pages
7
Pages from-to
516-522
Publisher name
Society of Wood Science and Technology
Place of publication
Monona
Event location
Portorož
Event date
Jul 12, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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