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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received May 16, 2016
Accepted August 29, 2016

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Photocatalytic degradation of toluene in a staged fluidized bed reactor using TiO2/silica gel

Hsiu-Po Kuo^{1 2†} Shang-Wen Yao^{1 3} An-Ni Huang^{1 4} Wan-Yi Hsu^{1 3}

¹Department of Chemical and Materials Engineering, Chang Gung University, Taoyuan 33302, Taiwan ²Department of Otorhinolaryngology, Chang Gung Memorial Hospital, Linkou, Taoyuan 33305, Taiwan ³, Taiwan ⁴Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Hiroshima 739-8527, Japan

hpkuo@mail.cgu.edu.tw

Korean Journal of Chemical Engineering, January 2017, 34(1), 73-80(8), 10.1007/s11814-016-0248-6

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Abstract

Relatively high concentration toluene is photocatalytically degraded in a multi-stage fluidized bed reactor continuously. The fluidizing media are titanium dioxide deposited silica gel particles, which are prepared by the doping sol-gel method. The effects of the Ti/Si atomic ratio, the inlet gas flow rates, and the number of the stages on the toluene removal efficiency were evaluated. The highest toluene removal efficiency is obtained when the fluidizing media are with the Ti/Si atomic ratio of 1.25. The apparent reaction orders are 0.4-0.5 for the single-stage system and 0.7 for the two-stage system, respectively. With an inlet toluene concentration of 1,000 ppm, a relative humidity of 30% and a volumetric flow rate of 10 L/min, the removal efficiency of toluene at the steady state is as high as 80% and is maintained in the 6-hr experimental time.

Keywords

Fluidized Bed Multi-stage Toluene Photocatalytic Degradation

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