TY - JOUR
T1 - Impinging-jet ozone bubble column modeling
T2 - Hydrodynamics, gas hold-up, bubble characteristics, and ozone mass transfer
AU - Baawain, Mahad S.
AU - El-Din, Mohamed Gamal
AU - Clarke, Katie
AU - Smith, Daniel W.
PY - 2007/7
Y1 - 2007/7
N2 - 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.
AB - 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.
KW - Back Flow Cell Model
KW - Backmixing
KW - Bubble Characteristics
KW - Gas Hold-up
KW - Hydrodynamics
KW - Impinging-Jet Bubble Column
KW - Overall Mass Transfer Coefficient
KW - Ozone
KW - Specific Bubble Interfacial Area
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U2 - 10.1080/01919510701451441
DO - 10.1080/01919510701451441
M3 - Article
AN - SCOPUS:34547735611
SN - 0191-9512
VL - 29
SP - 245
EP - 259
JO - Ozone: Science and Engineering
JF - Ozone: Science and Engineering
IS - 4
ER -