Photocatalysis of Phenol Using a Spinning Disc Photoreactor Immobilized with TiO sub(2) Nanoparticles: Hydrodynamic Modeling and Reactor Optimization

A spinning disc photoreactor using immobilized TiO sub(2) on a stainless steel disc is employed to study the degradation of phenol in aqueous solutions. The characterizations of the immobilized TiO sub(2) film are carried out by scanning electron microscopy, field emission scanning electron microsco...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2017-02, Vol.56 (7), p.1739-1749
Main Authors: Mirzaei, Mahboubeh, Dabir, Bahram, Dadvar, Mitra, Jafarikojour, Morteza
Format: Article
Language:English
Subjects:
Degradation
Disks
Hydrodynamics
Mathematical models
Optimization
Phenol
Spinning
Titanium dioxide
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Summary:A spinning disc photoreactor using immobilized TiO sub(2) on a stainless steel disc is employed to study the degradation of phenol in aqueous solutions. The characterizations of the immobilized TiO sub(2) film are carried out by scanning electron microscopy, field emission scanning electron microscopy, X-ray diffraction, Brunauer-Emmett-Teller analysis, and tensile adhesion test. The Box-Behnken design method is employed to identify the effects of three key operational parameters. The maximum predicted nanophotocatalytic degradation percent of phenol was 100% at the optimum processing condition (rotational speed, 290 rpm; flow rate, 2000 mL/min; and disc diameter, 22 cm). For a description of the flow pattern, the residence time distribution analysis is performed. By using a tanks-in-series model the equivalent number of continuous stirred tanks reactors at the obtained optimum condition was four. Hydrodynamic and kinetic models were combined to predict the degradation of phenol. Good agreement between the experimental and predicted results is shown.
ISSN:0888-5885
1520-5045
DOI:10.1021/acs.iecr.6b03204