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… that can be produced. New functions have been developed that estimate the biomass of branches and needles from stand variables. The new functions have been applied on a selection from Sveaskog´s inventory together with a model that estimates the amount of fuel collected in …
Storage of biomass is associated with problems like heat development, biomasslosses, and reduction of the fuel quality. Certain processes such as biological- andchemical degradation are responsible for these storage problems. This master?sthesis was carried out at Vattenfall …
… from soils with high clay content are most likely to cause deposit growth in biomass fired boilers, because of their rich content of nouris hment such as for example potassium. To confirm or reject this hypothesis, samples of soil, bio fuel and deposits where gathered and …
a comparative and kinetic study of thermal decomposition for Norway spruce stump, poplar and fuel tree chips
Stump biomass is energy rich and stump harvesting for use as fuel become more and more interesting in Sweden. Swedish Forest Agency (2009) has estimated that stump harvesting in Sweden would respond to an annual energy supply of 57 TWh/year. However, stump has not been …
… It is, however, possible that there will be an increased competition for biomass in the long run, because of new and expanded application areas for biomass, such as transportation fuel, bio plastic material, etc. The district heating sector is completely dependent on …
… is, in a scientific point of view, lacking when it comes to harvesting for biomass energy. Within the next decades it is expected that 280 000 hectares of lodgepole pine will have reached thinning age on the domains of Svenska Cellulosa Aktiebolaget (SCA). Due to this the …
Storage of biomass is often associated with problems such as heat development, dry matter losses and reduction of fuel quality. The rise in temperature can potentially cause a risk of self-ignition in the fuel storage. Moreover, emissions from storage piles can cause health …
Summary Today energy prices are rising. As a result biomass fuel is getting more and more interesting. Wood chips is very popular, but also straw from grain production is on the table. Lunds Energi AB project a combined power and heating plant in Örtofta out of Lund. Wood chips …
Fast pyrolysis is a method for converting biomass into three energy rich products: char, gas and bio-oil, where the latter is most interesting. Pyrolysis is an endothermic process where biomass is heated in an anaerobic environment and, with the right operating conditions, up to …
a study of producers using forestry- or agricultural sector feedstock
… resources in Sweden than the production of synthetic diesel of cellulosic biomass. The firms using forestry sector feedstock were otherwise facing similar difficulties and mostly with the authorities. As they were getting more established they were expecting competition …
… with many benefits, for example its ability to establish a large quantity of biomass in one year. Hemp is easy to grow and out-competes unwanted weeds through its aggressive growth pattern without the need for pesticides. Interest in growing hemp and other energy crops is …
en tidsstudie av Vimek 608 BioCombi i contortabestånd
… demands for forest fuels increases in Sweden. At present, large unutilized biomass resources is found in young, dense forests from which about five million oven-dry tonnes (ODt) (23 TWh) could annually be extracted as forest fuel. But harvesting small trees give high logging …
… fuel-data, resulted in the amount of fuel required.Since the energy content of biomass fuel is far less than that of uranium, massive amounts offuel have to be used to be able to produce the same amount of electricity.As a consequence, the logistics and handling costs for …
… stands of lodge pole pine in Norrbotten with respect on stem volume and total biomass. Further questions to answer is if there is stand characteristics that make the stands more suitable for pulpwood in early thinning, or if it is better to apply whole tree harvest. The study …
… production was compared to the effects of refined starch addition. The bulk biomass fuel raw material, to which the additive was added, was a blend of spruce and pine sawdust. An experimental design in the factors cassava/starch content, moisture content and material temperature …
