Print Email Facebook Twitter Alkali Activation–Granulation of Hazardous Fluidized Bed Combustion Fly Ashes Title Alkali Activation–Granulation of Hazardous Fluidized Bed Combustion Fly Ashes Author Yliniemi, J.H. (University of Oulu) Pesonen, Janne (University of Oulu) Tanskanen, Pekka (University of Oulu) Peltosaari, Olli (University of Oulu) Tiainen, Minna (Center for Molecular Materials) Nugteren, H.W. (TU Delft ChemE/Product and Process Engineering) Illikainen, Mirja (University of Oulu) Date 2017 Abstract Abstract: The increasing amount of fluidized bed combustion (FBC) ash is putting pressure on researchers to invent novel methods for utilizing the ash. The low reactivity and heavy metal content constrict the use of FBC ash in the same way as coal ash from pulverized combustion. Four FBC fly ashes from different power plants were granulated with sodium silicate solution in order to produce artificial aggregates. All aggregates matched the definition for lightweight aggregate according to the EN 13055-1 standard. The strongest aggregates were produced from fly ashes that had the highest X-ray amorphous material content and the highest amount of selectively soluble SiO2 and Al2O3. However, the same leaching problem (leaching of the anionic species) as with coal fly ashes was observed with the FBC fly ashes. The simultaneous high shear granulation and alkali activation of FBC ashes showed that artificial aggregates with satisfactory physical properties, such as density and strength, can be obtained even from low-reactive fly ashes that contain heavy metals. Graphical Abstract: [Figure not available: see fulltext.] Subject Alkali activationFluidised bed combustionFly ashGranulationHeavy metalLightweight aggregate To reference this document use: http://resolver.tudelft.nl/uuid:2cd19c0e-b44c-4ed8-a6cd-abcc801cbfc7 DOI https://doi.org/10.1007/s12649-016-9580-7 Embargo date 2017-05-26 ISSN 1877-2641 Source Waste and Biomass Valorization, 1-10 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2017 J.H. Yliniemi, Janne Pesonen, Pekka Tanskanen, Olli Peltosaari, Minna Tiainen, H.W. Nugteren, Mirja Illikainen Files PDF Alkali_Activation_Granula ... dfinal.pdf 973.47 KB Close viewer /islandora/object/uuid:2cd19c0e-b44c-4ed8-a6cd-abcc801cbfc7/datastream/OBJ/view