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題 名 | 利用TiO[feaf]光觸媒填充床處理室內揮發性有機物之研究=Study on the VOCs Removal with TiO[feaf] Photo-catalyst Packing Bed |
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作 者 | 蔡嘉緯; 張章堂; 邱求三; | 書刊名 | 宜蘭大學工程學刊 |
卷 期 | 3 2007.02[民96.02] |
頁 次 | 頁125-141 |
分類號 | 445.63 |
關鍵詞 | 光觸媒; 填充床; 二氧化鈦; 揮發性有機物; Photo-catalytic; Packing bed; UV/TiO[feaf]/glass; VOCs; |
語 文 | 中文(Chinese) |
中文摘要 | 因近幾年工商業的進步,加上人們居於室內時間頗多,因此室內揮發性有機物(VOCs)易對日常生活產生危害與困擾,亟需予以管制。雖處理室內VOCs技術頗多,仍以TiO₂光催化技術最具成效與應用性;又TiO₂活性主要受到污染物濃度、氣流流量、濕度及溫度等操作因子的影響。因此本研究目的乃評估TiO₂光觸媒對VOCs之處理效率,以瞭解TiO₂光觸媒反應特性。本實驗乃使用Degussa P-25商用TiO₂與石英砂為載體之自製TiO₂,藉填充床反應器處理甲苯、二甲苯及乙基苯等VOCs,並進行處理效率之評估。研究結果得知鈦玻璃填充床反應器於不照光下,甲苯經過20分鐘反應時間後,其去除率為12.3%;當照射365nm光線時,去除效率可高達99%。利用含鈦光觸媒處理VOCs時,以處理甲苯之處理效率為最高,高達90.5%,其次為乙基苯和二甲苯,處理效率皆為73.6%,並隨環境溼度之增加,處理效率相對提升;另廢氣通過填充床交換次數越多,對VOCs處理效率愈高。 |
英文摘要 | Volatile organic compounds (VOCs) are the typical indoor pollutants emitted from the furniture and clean agents in recent years of Taiwan. It is interesting that those VOCs could cause obvious effect on human health since human being stay in house for a long time. It is important to control those emitted VOCs and the understand the performance of control strategies, especially the most effective control techniques- TiO₂/UV control system. This study evaluated the performance of a photo-reactor packed with TiO₂/Glass that was initiated by the UV irradiation to decompose toluene and ethyl benzene and xylene (TEX) for indoor VOCs control. As a result, the degradation efficiency of TEX depended on packing materials and according to the sequence as follows: UV/ TiO₂/glass > UV/glass > TiO₂/glass. It is also important to understand the influence of operation parameters, such as species, concentration, temperature, humidity and flow rate etc., on the degradation efficiency. Therefore, the aim of this study is to assess the performance of TiO₂ photo-catalyst reactor under different conditions. This study compared the control efficiency of the commercial TiO₂ material, Degussa P-25, and the self-made TiO₂ material TiO₂/Quartz. The results showed that the control efficiency, up to 99%, of UV/ TiO₂ system was much larger than that, 12.3%, of TiO₂ system only. Furthermore, the toluene with the largest control efficiency, 90.5%, was the most easily controlled VOCs among the three species. The control efficiency of the other two kinds of VOCs, xylene and ethyl benzene, were only 73.6%. Additionally, the control efficiency of UV/ TiO₂ system increased with the increase of relative humidity and exchange rate of waste gas. |
本系統中英文摘要資訊取自各篇刊載內容。