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Effect of raw material composition in woody biomass pellets on combustion characteristics
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics, Energy Technology and Thermal Process Chemistry.
2007 (English)In: Biomass and Bioenergy, ISSN 0961-9534, E-ISSN 1873-2909, Vol. 31, no 1, 66-72 p.Article in journal (Refereed) PublishedText
Abstract [en]

Char yield, char combustion time and char combustion rate of pellets made from different tree parts of Norway spruce and industrially made stem wood pellets of Norway spruce and Scots pine were studied. The pellets were incinerated in a laboratory scale oven at various temperatures, gas flows and oxygen concentrations. It was found that the combustion time for a single pellet mostly depended on the raw material composition and to a minor extent on the density. Pellets made of bark had up to a 50% longer char combustion time compared to that of stem wood pellets, due to differences in char yield. Industrially made stem wood pellets of pine and spruce sawdust were found to have small differences in combustion characteristics. The variations in combustion characteristics of pellets are discussed in relation to composition of raw material.

Place, publisher, year, edition, pages
Oxford: Pergamon Press, 2007. Vol. 31, no 1, 66-72 p.
Keyword [en]
bark, branches, char yield, forest residues, Norway spruce, pyrolysis, Scots pine
National Category
Energy Engineering Environmental Biotechnology
Identifiers
URN: urn:nbn:se:umu:diva-118226DOI: 10.1016/j.biombioe.2006.06.016ISI: 000243709700007OAI: oai:DiVA.org:umu-118226DiVA: diva2:913540
Available from: 2016-03-21 Created: 2016-03-14 Last updated: 2016-03-21Bibliographically approved

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Öhman, Marcus
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