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Agglomeration characteristics using alternative bed materials for combustion of biomass
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2005 (English)In: Biomass for energy, industry and climate protection: 14th European Biomass Conference & Exhibition ; proceedings of the international conference held in Paris, France, 17 - 21 October 2005, Florence: ETA - Renewable Energies , 2005, 1343-1346 p.Conference paper, Published paper (Refereed)
Abstract [en]

The objective of the work was to evaluate differences in agglomeration characteristics between commercially available alternative bed materials and quartz-based bed materials, commonly used in fluidised bed combustion. Pure quartz bed materials. Magnesium oxide and foundry sand (natural sand with a clay coating) were used as alternative bed aterials. Carefully controlled bench-scale fluidised bed agglomeration experiments were performed, using calcium-rich bark and potassium-rich olive residue as model fuels with significantly different ash compositions, typical for forestry and griculture residues respectively. The resulting bed material particles and agglomerates were analysed with SEM/EDS. Analysis of bed material and agglomerates suggested that Mg and Al in the bed materials affect the agglomeration temperature positively for calcium-rich fuels. Al-rich foundry sand was found to decrease the agglomeration temperature in (Si, K)-rich systems. For combustion of olive residue in MgO bed, no attack layer was formed and agglomeration probably occurred via direct adhesion by partly melted alkali-silicates. The results suggest that the choice of bed material should take the intended fuel use into consideration.

Place, publisher, year, edition, pages
Florence: ETA - Renewable Energies , 2005. 1343-1346 p.
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-34528Local ID: 8bfe1170-b88f-11dc-b7e3-000ea68e967bISBN: 88-89407-07-7 (print)OAI: oai:DiVA.org:ltu-34528DiVA: diva2:1007779
Conference
European Biomass Conference & Exhibition : 17/10/2005 - 21/10/2005
Note
Upprättat; 2005; Bibliografisk uppgift: CD-ROM; 20080101 (ohmmar)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-11-25Bibliographically approved

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Öhman, Marcus
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