Enhanced xylene removal by photocatalytic oxidation using fiber-illuminated honeycomb reactor at ppb level

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• 作者：Yi-Ting Wu ; Yi-Hui Yu ; Van-Huy Nguyen ; Kung-Te Lu ; Jeffrey Chi-Sheng Wu ; Luh-Maan Chang ; Chi-Wen Kuo
• 关键词：Volatile organic compounds (VOCs) ; Photocatalytic oxidation (PCO) ; Ceramic honeycomb ; Optical fibers
• 刊名：Journal of Hazardous Materials
• 出版年：15 November, 2013
• 年：2013
• 卷：262
• 期：Complete
• 页码：717-725
• 全文大小：2348 K

文摘

The removal of volatile organic compounds (VOCs) at ppb level is one of the most critical challenges in clean rooms for the semiconductor industry. Photocatalytic oxidation is an innovative and promising technology for ppb-level VOCs degradation. We have designed a fiber-illuminated honeycomb reactor (FIHR) in which the removal efficiency of m-xylene is significantly enhanced to 96.5% as compared to 22.0% for UV irradiation only. The results indicate that photocatalysts not only play the role to substantially oxidize m-xylene, but also alter the chemical properties of xylene under UV illumination. Using the FIHR with Mn-TiO₂ photocatalyst not only increased the m-xylene removal efficiency, but also increased the CO₂ selectivity. Interestingly, Mn-TiO₂ in FIHR also showed a very good reusability, 93% removal efficiency was still achieved in 72-h in reaction. Thus, the FIHR gave very high removal efficiency for xylene at ppb level under room temperature. The FIHR has great potential application in the clean room for the air purification system in the future.