Examination of dispersed liquid-phase three-phase fluidized beds Part 1. Non-porous, uniform particle systems

Phillip C. Wright, Judy A. Raper

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This paper, first in a series, examines the effect of thin liquid films on the behaviour of gas-solid fluidized beds. The beds studied represent a limiting case of the broader area of three-phase fluidization, with this regime having potential applications in a number of areas, not least biotechnology. A number of non-volatile silicone oils ranging in viscosity from 0.0196 to 1.04 Ns/m2 have been examined on glass ballotini ranging in size from 2 to 5 mm in a conventional gas-solid fluidized bed. Oil loadings of up to 3% (wet basis) have been trialed. Liquid addition in this particle mass range tends to initially increase the minimum fluidization velocity above that of the non-wetted bed. However, the fluidization point falls below the dry bed at higher oil loadings. Increased viscosity of the liquid has only a small impact on the minimum fluidization velocity, and a stronger influence on the retardation of bed motion. The results obtained have been explained by a combination of static and dynamic bridge forces.

Original languageEnglish
Pages (from-to)208-226
Number of pages19
JournalPowder Technology
Volume97
Issue number3
DOIs
Publication statusPublished - 1 Jul 1998

Keywords

  • Agglomeration
  • Cohesive
  • Defluidization
  • Fluidization
  • Interparticle forces

Fingerprint Dive into the research topics of 'Examination of dispersed liquid-phase three-phase fluidized beds Part 1. Non-porous, uniform particle systems'. Together they form a unique fingerprint.

Cite this