Hydrodynamics and reactor performance evaluation of a high flux gas-solids circulating fluidized bed downer: Experimental study

Chengxiu Wang, Shahzad Barghi, Jesse Zhu

Research output: Journal PublicationArticlepeer-review

13 Citations (Scopus)

Abstract

Reactor performance of a high flux circulating fluidized bed (CFB) downer is studied under superficial gas velocities of 3-7 m/s with solids circulation rate up to 300 kg/m2s using ozone decomposition reaction. Results show that the reactant conversion in the downer is closely related to the hydrodynamics, with solids holdup being the most influential parameter on ozone decomposition. High degree of conversion is achieved at the downer entrance region due to strong gas-solids interaction as well as higher solids holdup and reactant concentration. Ozone conversion increases with the increase of solids circulation rate and/or the decrease of superficial gas velocity. Overall conversion in the CFB downer is less than but very close to that in an ideal plug flow reactor indicating a good reactor performance in the downer because of the nearly "ideal" hydrodynamics in downer reactors.

Original languageEnglish
Pages (from-to)3412-3423
Number of pages12
JournalAICHE Journal
Volume60
Issue number10
DOIs
Publication statusPublished - Oct 2014
Externally publishedYes

Keywords

  • Circulating fluidized bed
  • Downer
  • High flux
  • Hydrodynamics
  • Ozone decomposition
  • Reactor performance

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • General Chemical Engineering

Fingerprint

Dive into the research topics of 'Hydrodynamics and reactor performance evaluation of a high flux gas-solids circulating fluidized bed downer: Experimental study'. Together they form a unique fingerprint.

Cite this