Reduced VOC Emissions from Birch Sawdust Dried in a Steam Dryer
2003 (English)Conference paper (Other (popular science, discussion, etc.))
Large amounts of sawdust are dried for production of particleboard and pellets. During drying of wood, volatile organic compounds (VOC) are emitted. VOC emissions contribute in the presence of nitrogen oxides and sunlight to the formation of ground level ozone and other harmful photo-oxidants.
While several studies have been made on the amount and composition of emissions from softwoods during drying, hardwoods have been given less attention. Hardwoods have different wood structure and also differ in the chemical composition of volatiles.
In this study emissions of VOC from birch sawdust during drying in a steam dryer at atmospheric pressure were investigated. The drier was a pilot scale continuous spouted bed. Both the amount and the composition of emissions were determined. The sawdust was dried to different moisture contents in two drying medium temperatures (170 °C and 200 °C).
The results are compared to the emissions from softwoods dried in similar conditions. The results of this study should help to reduce emissions of volatile hydrocarbons during drying of hardwood sawdust and wood chips.
Place, publisher, year, edition, pages
VOC, birch, fluidised bed, spouted bed, drying, sawdust, wood
Research subject Environmental and Energy Systems
IdentifiersURN: urn:nbn:se:kau:diva-22923OAI: oai:DiVA.org:kau-22923DiVA: diva2:596677
CSChE 2003 - 53rd Canadian Chemical Engineering Conference, Hamilton, Ontario, Canada, 26-29 October 2003