Comprehensive Description of the Interactions between Silicate Bed Materials and Biomass Ash during DFB gasification
Licentiatavhandling, 2020
The bed material samples were analyzed with multiple analysis methods after their use in the Chalmers DFB gasifier (such as SEM-EDS, XRD and TEM). The interaction of biomass ash and bed material led to the accumulation of ash-derived elements on the surface of the bed particles. For all three materials, the development of a three layered structure was observed. Common for all materials was that a Mg-rich layer was found on the surface and a Ca-rich layer underneath. The layers between the particles’ core and the Ca-rich layer were different for the three materials and is therefore dependent on the utilized bed material. The accumulation of ash-derived elements led to an increase in activity towards tar reduction while at the same time depolymerization of the silicate network of the minerals could be observed.
Författare
Robin Faust
Chalmers, Kemi och kemiteknik, Energi och material
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Faust, R., Berdugo Vilches, T., Malmberg, P., Knutsson, P., Comparison of Ash Layer Formation Mechanisms on Si-containing Bed Material during Dual Fluidized Bed Gasification of Woody Biomass
Ämneskategorier
Kemiska processer
Bioenergi
Annan materialteknik
Utgivare
Chalmers