Catalytic ozone decomposition in a high density circulating fluidized bed riser

Chengxiu Wang, Gang Wang, Chunyi Li, Shahzad Barghi, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

18 Citations (Scopus)

Abstract

Reactor performance of a high density circulating fluidized bed (CFB) riser is studied using ozone decomposition with extremely high solids circulation rates up to 800 kg/m2s and superficial gas velocities ranging from 5 to 9 m/s. Results show that the axial and radial distributions of the ozone concentration are consistent with those of the solids holdup. Higher solids flux and/or lower gas velocity lead to higher reaction conversion in the riser. Solids holdup is the dominant factor affecting reaction conversion. Effects of solids holdup on overall ozone conversion are more significant under high superficial gas velocity and/or low solids circulation rate. Overall conversion in the high density riser is not only less than that of plug flow reactor but also less than that of completely stirred tank reactor indicating that, due to the two-phase nature inside the riser, a CFB riser is still far from an ideal plug flow reactor.

Original languageEnglish
Pages (from-to)6613-6623
Number of pages11
JournalIndustrial & Engineering Chemistry Research
Volume53
Issue number16
DOIs
Publication statusPublished - 23 Apr 2014
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Industrial and Manufacturing Engineering

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