Impinging-jet ozone bubble column modeling: Hydrodynamics, gas hold-up, bubble characteristics, and ozone mass transfer

Mahad S. Baawain, Mohamed Gamal El-Din, Katie Clarke, Daniel W. Smith

Research output: Contribution to journalArticle

6 Citations (Scopus)


A transient back flow cell model was used to model the hydrodynamic behaviour of an impinging-jet ozone bubble column. A steady-state back flow cell model was developed to analyze the dissolved ozone concentration profiles measured in the bubble column. The column-average overall mass transfer coefficient, kLa (s-1), was found to be dependent on the superficial gas and liquid velocities, uG (m.s-1) and uL (m.s-1), respectively, as follows: kLa = 55.58·uG1.26·uL0.08. The specific interfacial area, a (m-1), was determined as a = 3.61 × 103·uG0.902·uL -0.038 by measuring the gas hold-up (εG = 4.67·uG1.11·uL -0.05) and Sauter mean diameter, dS (mm), of the bubbles (dS = 7.78·uG0.207·uL - 0.008). The local mass transfer coefficient, kL (m.s-1), was then determined to be: kL = 15.40·uG0.354·uL0.118.

Original languageEnglish
Pages (from-to)245-259
Number of pages15
JournalOzone: Science and Engineering
Issue number4
Publication statusPublished - Jul 2007



  • Back Flow Cell Model
  • Backmixing
  • Bubble Characteristics
  • Gas Hold-up
  • Hydrodynamics
  • Impinging-Jet Bubble Column
  • Overall Mass Transfer Coefficient
  • Ozone
  • Specific Bubble Interfacial Area

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry

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