Enhanced fluidized bed desulfurization by pre-treated limestone particles. (Contributo in atti di convegno)

Type
Label
  • Enhanced fluidized bed desulfurization by pre-treated limestone particles. (Contributo in atti di convegno) (literal)
Anno
  • 2011-01-01T00:00:00+01:00 (literal)
Alternative label
  • F. Scala, R. Chirone, P. Meloni, G. Carcangiu, M. Manca, G. Mulas, A. Mulas (2011)
    Enhanced fluidized bed desulfurization by pre-treated limestone particles.
    in 7th Mediterranean Combustion Symposium, Chia Laguna (Ca)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • F. Scala, R. Chirone, P. Meloni, G. Carcangiu, M. Manca, G. Mulas, A. Mulas (literal)
Pagina inizio
  • SFWCG-17 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 7 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Ricerche sulla Combustione - CNR, P.le Tecchio 80, 80125 Napoli (Italy) Università di Cagliari, Dip. di Ingegneria Chimica e Materiali, Piazza d'Armi 1, 09127 - Cagliari (Italy) Istituto di Geoingegneria e Tecnologie Ambientali - CNR, Piazza d'Armi 1, 09127 - Cagliari (Italy) Calcidrata S.p.A - Via Valsugana 6, 09123 - Cagliari (Italy) (literal)
Titolo
  • Enhanced fluidized bed desulfurization by pre-treated limestone particles. (literal)
Abstract
  • In this work we have tested the fluidized bed desulfurization performance of lime particles obtained by means of a proprietary limestone slow calcination pre-treatment technique. This performance was compared with that of the parent untreated limestone particles. The occurrence of particle fragmentation and attrition during the fluidized bed operation was also investigated with a specific test protocol for both limestone and pre-treated lime sorbents. Two particle size ranges were tested under typical fluidized bed coal combustion conditions (T = 850°C; SO2 = 1800 ppm). The experiments were complemented by porosimetric and morphological (SEM) analyses of the sorbent. Results showed that limestone pre-treatment was able to preserve the high mechanical strength of the parent particles as opposed to the fast in situ calcination typically active in fluidized beds. In addition, a high calcium reactivity and final conversion were observed for the pre-treated lime particles, leading to a SO2 capture capacity per unit mass of sorbent much higher than that obtained with the untreated limestone. Simple economic evaluations suggest that the use of the pre-treated lime in place of limestone can involve significant economies for fluidized bed coal combustor operators. (literal)
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