Attrition of wood pellets and chips during FB combustion and gasification. (Contributo in atti di convegno)

Type
Label
  • Attrition of wood pellets and chips during FB combustion and gasification. (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • P. Ammendola, R. Chirone, G. Ruoppolo, F. Scala (2011)
    Attrition of wood pellets and chips during FB combustion and gasification.
    in XXXIV Event of the Italian Section of the Combustion Institute, Roma
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • P. Ammendola, R. Chirone, G. Ruoppolo, F. Scala (literal)
Pagina inizio
  • paper III-3 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 34 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Ricerche sulla Combustione - CNR (literal)
Titolo
  • Attrition of wood pellets and chips during FB combustion and gasification. (literal)
Abstract
  • Fragmentation and attrition of two biomass fuels, namely wood chips and wood pellets, was investigated in a lab-scale fluidized bed apparatus under both combustion and gasification conditions. The aim was to study the effect of their different mechanical strength on fuel particle size distribution and overall carbon conversion. Primary fragmentation tests showed that for wood pellets limited fragmentation occurred during devolatilization, with a fragmentation probability around 30% and particle multiplication factor of 1.4. On the contrary, wood chips were subject to extensive fragmentation as witnessed by large values of the particle multiplication factor and of the fragmentation probability. Results of char attrition experiments carried out under inert, combustion and gasification conditions showed that the carbon loss by elutriation is only critical during gasification, especially for the wood chips char. A gasification-assisted attrition mechanism was proposed to explain the experimental results, similar to the combustion-assisted attrition already documented under oxidizing conditions. The higher mechanical strength of the wood pellets appears to be beneficial for reducing carbon elutriation and for obtaining a higher carbon conversion. (literal)
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