The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering
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May 13-17, 2007
A theoretical study has been performed in order to investigate the interaction between fluidized bed (FB) temperature and original size of coal, and the pressure rise within a large coal particle during the initial phases of the combustion process. A mathematical model, describing the devolatilization process, has included the internal and external heat transfer, primary decomposition reactions and mass transfer. The model has shown how the FB temperature and original size of coal reflect on the pressure profile of the coal particle during the devolatilization. One of the major consequences of coal devolatilization in the fluidized bed is the primary fragmentation; hence, the special attention has been paid to this process. On the basis of the devolatilization model results, a physical model of the primary fragmentation in FB is proposed.
Milijana Paprika, Mirko Komatina, Franz Winter, and Dragoljub Dakic, "Influence of FB Conditions on Processes Within a Large Fuel Particle During Initial Phases of Conversion" in "The 12th International Conference on Fluidization - New Horizons in Fluidization Engineering", Franco Berruti, The University of Western Ontario, London, Canada; Xiaotao (Tony) Bi, The University of British Columbia, Vancouver, Canada; Todd Pugsley, University of Saskatchewan, Saskatoon, Saskatchewan, Canada Eds, ECI Symposium Series, (2007). http://dc.engconfintl.org/fluidization_xii/121