The influence of temperature on limestone sulfation and attrition under fluidized (Contributo in atti di convegno)

Type
Label
  • The influence of temperature on limestone sulfation and attrition under fluidized (Contributo in atti di convegno) (literal)
Anno
  • 2009-01-01T00:00:00+01:00 (literal)
Alternative label
  • Scala F., Montagnaro F., Salatino P (2009)
    The influence of temperature on limestone sulfation and attrition under fluidized
    in Proc. of 6th Mediterranean Combustion Symposium, Ajaccio, France
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Scala F., Montagnaro F., Salatino P (literal)
Pagina inizio
  • 124 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Ricerche sulla Combustione - CNR Dipartimento di Chimica - Università degli Studi di Napoli Federico II Dipartimento di Ingegneria Chimica - Università degli Studi di Napoli Federico II (literal)
Titolo
  • The influence of temperature on limestone sulfation and attrition under fluidized (literal)
Abstract
  • The influence of temperature on attrition of two limestones during desulfurization in a fluidized bed reactor was investigated. Differences in the microstructure of the two limestones were reflected by a different thickness of the sulfate shell formed upon sulfation and by a different value of the ultimate calcium conversion degree. Particle attrition and fragmentation were fairly small under moderately bubbling fluidization conditions for both limestones. An increase of temperature from 850°C to 900°C led to an increase of the attrition rate, most likely because of a particle weakening effect caused by a faster CO2 evolution during calcination. This weakening effect, however, was not sufficiently strong to enhance particle fragmentation in the bed. The progress of sulfation, associated to the build-up of a hard sulfate shell around the particles, led in any case to a decrease of the extent of attrition. Sulfation at 900°C was less effective than at 850°C, and this was shown to be related to the porosimetric features of the different samples. (literal)
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