Puupolttoaineiden esikäsittelyn kemialliset vaikutukset - PUUT37

Translated title of the contribution: Chemical effects of the pretreatment of wood fuels

Leena Fagernäs, Paterson McKeough, Markku Kallio

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


The aim was to determine the effects of different wood fuels and their drying on the quality of wood pellets and pyrolysis oil. In addition, an aim was to determine emissions from drying and to evolve a dryer model based on the emissions. In another VTT project funded by the Finnish Work Environment Fund and linked with the Tekes project, the quality of wood fuels was studied with regard to occupational health problems. The research was carried out in co-operation with Åbo Akademi University, Swedish University of Agricultural Sciences and Kuopio Regional Institute of Occupational Health. The research included laboratory fixed-bed drying tests, modelling of drying emissions, pelletisation tests with flat die and ring die presses, and co-operation with the Swedish bark project. As raw materials, fresh sawdust, fresh and stored forest chips, and fresh pine and spruce barks, were used. The effects of feedstock, storage, particle size, temperature and final moisture content, on the emissions of drying were determined. The model obtained could be used in the integration of drying in different conversion processes. With forest chips and wood barks, it was possible to get high-quality pellets with the flat die press. The results related to pyrolysis oil were obtained in the VTT pyrolysis projects, funded by Tekes and EU. On the basis of the results, optimization of wood fuels and their pretreatment in regard to the quality of pellets and oils was carried out.
Translated title of the contributionChemical effects of the pretreatment of wood fuels
Original languageFinnish
Title of host publicationPuuenergian teknologiaohjelman vuosikirja 2003
Subtitle of host publicationPuuenergian teknologiaohjelman vuosiseminaari
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
ISBN (Electronic)951-38-6288-7
ISBN (Print)951-38-6287-9
Publication statusPublished - 2004
MoE publication typeB3 Non-refereed article in conference proceedings
EventPuuenergian teknologiaohjelman vuosiseminaari - Jyväskylä, Finland
Duration: 17 Mar 200418 Mar 2004

Publication series

SeriesVTT Symposium


SeminarPuuenergian teknologiaohjelman vuosiseminaari


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