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자료유형
학술저널
저자정보
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제24권 제1호
발행연도
2008.2
수록면
91 - 99 (9page)

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A multilayer tower-type photoreactor, in which TiO₂ vapor-phase BTEX removal efficiencies by ozone oxidation (O₃/UV), photocatalytic oxidation (TiO₂/UV) and the combination of ozone and photocatalytic oxidation (O₃/TiO₂/UV) process, respectively. The experiments were conducted under various relative humidities, temperatures, ozone concentrations, gas flow rates and BTEX concentrations. As a result, the BTEX removal efficiency and the oxidaion rate by O₃/TiO₂/UV system were highest, compared to O₃/UV and TiO₂/UV system. The O₃/TiO₂/UV system accelerated the low oxidation rate of low-concentration organic compounds and removed organic compounds to a large extent in a fixed volume of reactor in a short time. Therefore, O₃/TiO₂/UV system as a superimposed oxidation technology was developed to efficiently and economically treat refractory VOCs. Also, this study demonstrated feasibility of a technology to scale up a photoreactor from lab-scale to pilot-scale, which uses (ⅰ) a separated light-source chamber and a light distribution system, (ⅱ) catalyst fixing to glass-tube media, and (ⅲ) unit connection in series and/or parallel. The experimental results from O₃ obtained under relative humidity ranging from 50 to 55% and temperature ranging from 40 to 50℃, and (ii) the removal efficiencies linearly increased with ozone dosage and decreased with gas flow rate. When applying Langmuir-Hinshelwood model to TiO₂/UV and O₃/TiO₂/UV system, reaction rate constant for O₃/TiO₂/UV system was larger than that for TiO₂/UV system, however, it was found that adsorption constant for O₃/TiO₂/UV system was smaller than that for TiO₂/UV system due to competitive adsorption between organics and ozone.

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Abstract
1. 서론
2. 실험장치 및 방법
3. 결과 및 고찰
4. 결론
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UCI(KEPA) : I410-ECN-0101-2009-539-016415311