光觸媒反應器對於丙酮及氨氣降解效率之探討

Photocatalytic Reactors for Air Treatment: Photodegradation of Acetone and Ammonia

梁婉婧(Yun-Ching Leong) ； 黃振康(Chen-Kang Huang)

《台灣農學會報》 16卷3期 (2015/09) Pp. 279-292

https://doi.org/10.6730/JAAT.201509_16(3).0006

摘要

本研究以二氧化鈦P25混合活性碳粉末以含浸法製作光觸媒並塗佈於基材上，分別使用壓克力製之直立式清淨裝置及旋風筒兩種光觸媒反應器於較大空間測試對丙酮及氨氣之殘留率。以150ppm為丙酮起始濃度時，反應四小時後，壓克力製之直立式清淨裝置光觸媒反應器殘留率最低達0.0367，而旋風筒殘留率則可達0.0；起始濃度較低(9-51ppm)時，實驗結果顯示在130分鐘以後都有將近0.0之殘留率。另外，以金屬鋁板作為基材時，將鋁板接地導出過剩電子，殘留率較無接地時平均降低了3.625%。氨氣降解實驗結果顯示，實驗七小時後實驗重複三次之殘留率分別可達0.1149、0.000及0.2278。實驗結果證明本研究之光觸媒材料與清淨裝置能有效去除丙酮、氨氣及NO_x副產物。

關鍵字

室內空氣品質 ； 光觸媒反應 ； 有機揮發物質之降解

並列摘要

In this study, titanium dioxide P25 mixed with activated carbon was coated on glass and aluminum sheets, respectively, to determine the photodegradation rate of acetone and ammonia in a 725 L chamber. A cyclone and acrylic straight box were used as photocatalytic reactors. In the cyclone photocatalytic reactor, the photodegradation rate of acetone was almost 0.0 in both high initial condition of 150 ppm and low C_i (9-51 ppm), where there were 0.1149, 0.0, and 0.2278 for NH_3 after 7 hours. Besides, the side products NO_x could be adsorbed on activated carbon. Photodegradation rate in the acrylic straight photocatalytic reactor was 0.0367. It was not so efficient when using an aluminum sheet with ground. The results showed the cyclone photocatalytic reactor had higher photodegradation efficiency than the acrylic straight photocatalytic reactor due to the long gas retention time.

並列關鍵字

Indoor air quality ； Photocatalytic ； Photodegradation of VOCs