Experimental study on reactor performance of gas–solids low-velocity fluidized beds

Jiangshan Liu, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

2 Citations (Scopus)

Abstract

Reactor performance of bubbling fluidized bed (BFB) and turbulent fluidized bed (TFB) was carefully examined and systematically compared using catalytic ozone decomposition as a model reaction, based on a complete mapping of local flow structures and spatial distributions of ozone conversion and solids holdup. TFB clearly has a higher conversion and shows better reactor performance than BFB as a result of the vigorously turbulent flow and the relatively homogeneous gas–solids mixing in TEB. Besides, the intensive interaction between gas and solids in TFB leads to greater gas–solids contact efficiency of TFB over that of BFB. Due to gas bypassing and backmixing caused by bubbling behaviours and two-phase structure, BFB deviates significantly from a plug flow reactor and sometimes from a continuously stirred tank reactor. The flow structures essentially dictate the reactor performance in the low-velocity fluidized beds.

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalParticuology
Volume66
DOIs
Publication statusPublished - Jul 2022
Externally publishedYes

Keywords

  • Bubbling fluidized bed
  • Conversion distribution
  • Flow structure
  • Gas–solids contact efficiency
  • Reactor performance
  • Turbulent fluidized bed

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Materials Science (all)

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