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Received December 21, 2004
Accepted February 14, 2005
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Photocatalytic Degradation of Toluene with Ozone Addition
Department of Environmental Engineering, Pukyong National University, 599-1, Daeyon-Dong, Nam-Gu, Busan 608-737, Korea
Korean Journal of Chemical Engineering, May 2005, 22(3), 364-369(6), 10.1007/BF02719412
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Abstract
The main goal of this study is to analyze the characteristics of photodegradation and photocatalytic activation experimentally with the major parameters such as air flow rate, inlet toluene concentration, ozone concentration, UV light and bead material, etc.. In particular, the effects of transmissivity of UV radiation with TiO2 coated supporter (bead material) and void fraction (bead size) on the photocatalytic degradation are estimated for TiO2/UV and O3/TiO2/UV process. In results, the experiment shows that the UV light transmissivity of 5mm glass bead becomes much higher than that of 6.5 mm alumina bead in spite of lower void fraction inducing the higher photoactivation. The conversion of toluene represents about 96% during reaction time 420 min at the toluene concentration of 100 ppm and ozone concentration of 2.5 ppm, showing a conversion rate of ozone of 95% for O3/TiO2/UV process.
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