Effect of gas properties and wall materials on particle charging in gas–solid fluidized beds

Jiangtian Hou, Xiaoyu Liu, M. Hafizur Rahman, Haisheng Li, Sankaran Sundaresan, John R. Grace, Xiaotao Bi

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The charges acquired by polyethylene and glass particles fluidized by argon, nitrogen, and air at different humidity levels in acrylic and steel columns have been measured. Increased bed expansion at higher fluidization gas velocities lowered the space charge effect, allowing the particles to acquire more charges. The low dielectric strength of argon limits the extent of charging when the particles are fluidized in argon. The effect of the humidity of the air on particle charge differed appreciably between the two columns. The charge densities acquired by the particles in several experiments appear to have been limited by the dielectric strength of the fluidization gas.

Original languageEnglish (US)
Pages (from-to)244-255
Number of pages12
JournalCanadian Journal of Chemical Engineering
Volume101
Issue number1
DOIs
StatePublished - Jan 2023

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering

Keywords

  • charge relaxation
  • dielectric breakdown
  • electrostatics
  • fluidized bed
  • tribocharging

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