Photocatalytic oxidation of toluene and isopropanol by LaFeO3/Black-TiO2
| Autor: | Yun-En Lee, 李昀恩 |
|---|---|
| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 Volatile organic compounds (VOCs) are important air pollutants emitted from industrial, domestic and natural sources. Toluene and isopropanol (IPA) are VOCs which are commonly used in industrial manufacture. Typical technologies including adsorption, absorption, and combustion have been employed to eliminate VOCs from gas streams. Recently, photocatalysis is regarded as a potential way for the removal of VOCs. TiO2 is the most common photocatalyst in the photocatalysis field and also the most likely to be applied in industrial scale, due to its non-toxicity, abundance and photo/chemical stability. However, TiO2 has some limits including it has fast recombination rate of electron-hole pair and only absorbs UV light. Therefore, in this study, removal of toluene and IPA were investigated using black-TiO2 catalyst. Black-TiO2 can absorb visible light and has more defects on the catalyst surface. In this study, we discuss the conversion rate of VOCs by black-TiO2. The results, indicate that 98% and 89% conversion rate can be achieved for IPA and toluene, respectively. As the oxygen content is increased, the conversion rate also increases. As flow rate and hydrogen concentrations are increased, the conversion rate decreases. The results indicate higher removal efficiencies can be achieved with black-TiO2 when compared with TiO2 and LFO/black-TiO2. Overall, the preliminary results indicate that black-TiO2 can enhance the performance of photocatalysis system for toluene and IPA removal. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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