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Heating values of mature trees.

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dc.contributor.author Nurmi, Juha
dc.date.accessioned 2011-07-28T13:27:01Z
dc.date.available 2011-07-28T13:27:01Z
dc.date.issued 1997
dc.identifier.citation Acta Forestalia Fennica. 1997. 256: 1-28. fi
dc.identifier.isbn 951-40-1561-4
dc.identifier.issn 0001-5636
dc.identifier.uri http://hdl.handle.net/10138/27295
dc.description.abstract The effective heating values of the above and below ground biomass components of mature Scots pine (Pinus sylvestris), Norway spruce (Picea abies), downy birch (Betula pubescens), silver birch (Betula pendula), grey alder (Alnus incana), black alder (Alnus glutinosa) and trembling aspen (Populus tremula) were studied. Each sample tree was divided into wood, bark and foliage components. Bomb calorimetry was used to determine the calorimetric heating values. The species is a significant factor in the heating value of individual tree components. The heating value of the wood proper is highest in conifers. Broad-leaved species have a higher heating value of bark than conifers. The species factor diminishes when the weighted heating value of crown, whole stems or stump-root-system are considered. The crown material has a higher heating value per unit weight in comparison with fuelwood from small-sized stems or wholetrees. The additional advantages of coniferous crown material are that it is a non-industrial biomass resource and is readily available. The variability of both the chemical composition and the heating value is small in any given tree component of any species. However, lignin, carbohydrate and extractive content were found to vary from one part of the tree to another and to correlate with the heating value. fi
dc.language.iso en fi
dc.publisher The Society of Forestry in Finland en
dc.publisher Finnish Forest Research Institute en
dc.subject lämpöarvo fi
dc.subject puulajit fi
dc.subject mänty fi
dc.subject kuusi fi
dc.subject hieskoivu fi
dc.subject rauduskoivu fi
dc.subject harmaaleppä fi
dc.subject tervaleppä fi
dc.subject haapa fi
dc.subject biomassa fi
dc.subject biomass en
dc.subject calorific value en
dc.subject logging wastes en
dc.subject lignins en
dc.subject carbohydrates en
dc.subject hydrogen en
dc.subject carbon en
dc.subject wood extracts en
dc.subject biomass, heating value, logging residue, lignin, carbohydrates, extractives, hydrogen, carbon fi
dc.title Heating values of mature trees. en
dc.type Artikkeli fi
dc.identifier.laitoskoodi SMS fi
dc.creator.corporateName Finnish Forest Research Institute. Kannus Research Station en
dc.date.accepted 1997-05-14

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