Characteristics of the photocatalytic reactor with an annular array of glass tubes surrounding a light source(1)Selection of a light source and photocatalyst support
Characteristics of the photocatalytic reactor with an annular array of glass tubes surrounding a light source(1)Selection of a light source and photocatalyst support
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光源周围玻璃管环形阵列光催化反应器的特点(1)光源和光催化剂载体的选择
DOI：
10.11450/seitaikogaku1989.13.2_1
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
K. Nakano
中科院分区：
文献类型：
--
作者：
Satoru Fukinbara;F. Shiraishi;K. Nakano
在一系列的两篇论文中，人们对光催化反应器的性能进行了实验和理论研究，其中光源被 19 个透明玻璃管的环形阵列包围，整体上形成锯齿形流动路径。在第一篇论文中，基于间歇再循环和连续流动模式下 2, 4-二硝基苯酚 (DNP) 的光催化分解，研究了此类反应器的光源和玻璃材料的种类。研究发现，黑光荧光灯的紫外线不仅可以透过石英玻璃管，还可以透过派热克斯玻璃管，而不会降低其光强度。使用白色荧光灯也获得了相同的结果。同样，杀菌灯发出的紫外线透过石英玻璃时不会降低其光强度，但它不会透过派热克斯玻璃，导致DNP分解率显着降低。当 Pyrex 玻璃管用作支撑时，黑光荧光灯给出了最大的反应器活性。然而，使用杀菌灯导致DNP分解率显着降低，因为Pyrex玻璃管完全阻挡了波长254 nm的紫外线。在使用石英玻璃管作为支撑的光催化反应器中，杀菌灯比其他光源发生更快的DNP分解。由于紫外光含量低，白色荧光灯使 DNP 分解较慢。此外，当涂有二氧化钛的玻璃珠填充在 Pyrex 玻璃管中时，使用三种光源可以更快地分解 DNP。从实际使用的角度来看，得出的结论是，黑光荧光灯与 Pyrex 玻璃管的组合对于本文研究的光催化反应器类型是合理的。
In a series of two papers, the performance of a photocatalytic reactor, where a light source is surrounded by an annular array of 19 transparent glass tubes, giving a zigzag-flow path as a whole, has been studied both experimentally and theoretically. In this first paper, the kinds of light source and glass material for such a reactor have been investigated based on the photocatalytic decomposion of 2, 4-dinitrophenol (DNP) in batch-recirculation and continuous-flow modes. The UV light of a blacklight fluorescent lamp was found to permeate through not only a quartz glass tube but also a Pyrex glass tube without reducing its light intensity. The same result was obtained with a white fluorescent lamp. Similarly, the UV light emitted from a germicidal lamp permeated through a quartz glass without reducing its light intensity, but it did not permeate through a Pyrex glass, which resulted in a remarkable reduction in the rate of DNP decomposition. When Pyrex glass tubes were used as a support, the blacklight fluorescent lamp gave a maximum reactor activity. However, the use of the germicidal lamp caused a marked reduction in the rate of DNP decomposition because the Pyrex glass tube completely blocked off the UV light with a wavelength of 254 nm. In the photocatalytic reactor using quartz glass tubes as a support, a rapid DNP decomposition occurred with the germicidal lamp than with other light sources. The white fluorescent lamp gave a slower decomposition of DNP because of a low content of the UV light. Furthermore, when glass beads coated with titanium oxide were packed in Pyrex glass tubes, DNP was more rapidly decomposed using three kinds of the light sources. From the standpoint of the practical use, it is concluded that a combination of the blacklight fluorescent lamp with Pyrex glass tubes is reasonable for the type of the photocatalytic reactor investigated here.