Investigation of phenol degradation : True reaction kinetics on fixed film titanium dioxide photocatalyst

Vezzoli, Massimiliano, Martens, Wayde N., & Bell, John M. (2011) Investigation of phenol degradation : True reaction kinetics on fixed film titanium dioxide photocatalyst. Applied Catalysis A: General, 404(1-2), pp. 155-163.

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This study of photocatalytic oxidation of phenol over titanium dioxide films presents a method for the evaluation of true reaction kinetics. A flat plate reactor was designed for the specific purpose of investigating the influence of various reaction parameters, specifically photocatalytic film thickness, solution flow rate (1–8 l min−1), phenol concentration (20, 40 and 80 ppm), and irradiation intensity (70.6, 57.9, 37.1and 20.4 W m−2), in order to further understand their impact on the reaction kinetics. Special attention was given to the mass transfer phenomena and the influence of film thickness.

The kinetics of phenol degradation were investigated with different irradiation levels and initial pollutant concentration. Photocatalytic degradation experiments were performed to evaluate the influence of mass transfer on the reaction and, in addition, the benzoic acid method was applied for the evaluation of mass transfer coefficient.

For this study the reactor was modelled as a batch-recycle reactor. A system of equations that accounts for irradiation, mass transfer and reaction rate was developed to describe the photocatalytic process, to fit the experimental data and to obtain kinetic parameters. The rate of phenol photocatalytic oxidation was described by a Langmuir–Hinshelwood type law that included competitive adsorption and degradation of phenol and its by-products. The by-products were modelled through their additive effect on the solution total organic carbon.

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13 citations in Scopus
12 citations in Web of Science®
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ID Code: 46414
Item Type: Journal Article
Refereed: Yes
Keywords: Titanium Dioxide Photocatalysis, True Reaction Rate, Flat Plate Reactor, Phenol Degradation, Langmuir-Hinshelwood, Mass Transfer Coefficient
DOI: 10.1016/j.apcata.2011.07.025
ISSN: 1873-3875 (online) 0926-860X (print)
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 Elsevier BV
Deposited On: 12 Oct 2011 23:31
Last Modified: 24 Aug 2016 00:08

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