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Bed agglomeration characteristics of wood-derived fuels in FBC
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics, Energy Technology and Thermal Process Chemistry.
Umeå University, Faculty of Science and Technology, Department of Applied Physics and Electronics, Energy Technology and Thermal Process Chemistry. Åbo Akademi University.
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2006 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 20, no 2, 818-824 p.Article in journal (Refereed) PublishedText
Abstract [en]

The agglomeration tendency of five Scandinavian forest-derived biomass fuels was studied using an advanced fuel analysis, i.e., a combination of chemical fractionation analysis, controlled bed defluidization tests, and SEM/EDX analysis of bed samples. It is shown that all five fuels have a tendency to form bed agglomerates when fired in a fluidized bed with silica sand as the bed material. The agglomeration appeared to proceed by formation of a sticky layer on bed particles gluing them together. The layers on the bed particles contained Si, Ca, and K, and, in some cases, P. The combination of advanced fuel analysis by SEM/EDX showed that the soluble fraction of Ca and K (i.e., leachable from the fuel with water and acetate) may be responsible for the formation of the layer. Silicon may mainly come from the bed particles.

Place, publisher, year, edition, pages
Washington: American Chemical Society (ACS), 2006. Vol. 20, no 2, 818-824 p.
Keyword [en]
ash chemistry, biomass fuels, gasification, prediction, behavior
National Category
Chemical Engineering Bioenergy
Identifiers
URN: urn:nbn:se:umu:diva-119407DOI: 10.1021/ef050349dISI: 000236168700054OAI: oai:DiVA.org:umu-119407DiVA: diva2:926937
Available from: 2016-05-10 Created: 2016-04-18 Last updated: 2016-05-10Bibliographically approved

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Öhman, MarcusBackman, RainerNordin, Anders
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