Photocatalytic degradation of organic compounds in aqueous solution by a TiO2-coated rotating-drum reactor using solar light |
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Authors: | Lianfeng Zhang Tatsuo Kanki Noriaki Sano Atsushi Toyoda |
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Affiliation: | * Department of Chemical Engineering, Himeji Institute of Technology, 2167 Shosha, Himeji 671-2201, Japan;** Research and Development Division, Envisys Ltd, 2-121 Tegara, Himeji 670-0972, Japan |
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Abstract: | This paper deals with the degradation of aqueous phenol by a newly proposed rotating-drum reactor coated with a TiO2 photocatalyst, in which TiO2 powders loaded with Pt are immobilized on the outer surface of a glass-drum. The reactor can receive solar light and oxygen from the atmosphere effectively. It was shown experimentally that phenol can be decomposed rapidly by this reactor under solar light: with our experimental conditions the phenol with an initial concentration of 22.0 mg/dm3 was decomposed within 60 min and was completely mineralized through intermediate products within 100 min. The photonic efficiency under solar light was shown to take the value 0.00742 mol-C/Einstein. The photocatalytic decomposition processes of phenol by this reactor were also discussed on the basis of the Langmuir–Hinshelwood kinetic model. |
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