Experimental study of gas and particle behavior in the grid zone of a jetting fluidized bed cold model

T. Kimura*, K. Horiuchi, T. Watanabe, M. Matsukata, T. Kojima

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


The local behavior of gas and solids in a grid zone was investigated using a jetting fluidized bed cold model. Spherical alumina particles (440 μm, 1500 kg/m3) were used as bed material. A pair of optical fiber sensors, an A D converter and a personal computer were used to measure particle velocity in the jet, jet diameter and jet height. Tracer gas introduced from a center nozzle was sampled from various points in the grid zone and its concentration was measured by gas chromatography to investigate gas interchange between the jet and the annulus, and the gas dispersion in the annulus region. The effects of operational conditions, i.e., the shape of the gas distributor, nozzle diameter and gas flow rates, on the gas and particle behavior are discussed. It was considered that many more particles entered into the jet when a cone-shaped distributor rather than a flat distributor was employed. Employment of a narrower nozzle caused an increase in particle velocity at the bottom of the bed.

Original languageEnglish
Pages (from-to)135-143
Number of pages9
JournalPowder Technology
Issue number2
Publication statusPublished - 1995 Feb
Externally publishedYes


  • Fluidized bed
  • Gas concentration profile
  • Grid zone
  • Jet height
  • Model
  • Optical fiber sensor
  • Particle velocity

ASJC Scopus subject areas

  • Chemical Engineering(all)


Dive into the research topics of 'Experimental study of gas and particle behavior in the grid zone of a jetting fluidized bed cold model'. Together they form a unique fingerprint.

Cite this