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Design of Photocatalytic Reactor Suspended with Semiconductor Powder.

半导体粉末悬浮光催化反应器的设计。

基本信息

批准号：
06650890
负责人：
FUNAYAMA Hitoshi
金额：
$ 1.09万
依托单位：
Akita National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

The main object of this research project is to obtain fundamental information for design of suspended photocatalytic reactor. So, the light intensity distributions in this reactors and the photocatalytic oxidation rate were investigated in a suspension of titanium-dioxide powder.The following conclusions were obtained.(1) The local light intensity distribution in a rectangular photoreactor suspended with titanium-dioxide was detected with a photo-probe. The light intensity slowly decreased at low titanium-dioxide concentration area, but rapidly increased first and gradually decreased later at high concentration area.(2) According to the three-dimensional six-flux model proposed in this research project, the local light intensity distribution could be simulated.(3) For an annular photoreactor suspended with titanium-dioxide, the average light intensity and local light intensity distribution was decided with a DPOF chemical actinometer system and a photo-probe, respectively. The former gradually decreased first and rapidly decreased later with increase of titanium-dioxide concentration, the later was almost the same as the distribution in a rectangular photoreactor suspended with titanium-dioxide.(4) The photocatalytic oxidation rate of NADH was affected by the relative concentration ratio of catalyst and reactant. Addition of a rutile type titanium-dioxide was not useful for photocatalytic oxidation rate because of absorption by anatase type titanium-dioxide.

本研究项目的主要目的是获得悬浮式光催化反应器设计的基础信息。因此,对二氧化钛粉末悬浮液中反应器内的光强分布和光催化氧化速率进行了研究。得到以下结论:(1)用光探针检测了悬浮二氧化钛的矩形光反应器内的局部光强分布。在低二氧化钛浓度区域光强缓慢下降，但在高浓度区域先快速增加，后逐渐下降。(2)根据本研究项目提出的三维六通量模型，可以模拟局部光强分布。(3)对于悬浮有二氧化钛的环形光反应器，通过DPOF化学光量计系统确定平均光强和局部光强分布，分别是一个光探针。随着二氧化钛浓度的增加，前者先逐渐下降，后迅速下降，后者与悬浮二氧化钛的矩形光反应器中的分布几乎相同。(4)NADH的光催化氧化速率受催化剂与反应物相对浓度比的影响。由于锐钛矿型二氧化钛的吸收，金红石型二氧化钛的添加对于光催化氧化速率没有用处。