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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

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&apos; 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

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

  • 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

  • e-ISSN

  • 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