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摘要: 利用傅里叶变换红外光谱仪(FT-IR)，在间歇式反应器中研究了高浓度乙醇的低温光催化氧化特性。研究结果表明，FT-IR技术能够用来研究气态有机物的光催化降解特性；在乙醇的光催化降解过程中，有乙醛等中间产物生成，乙醇先被氧化为乙醛，再被氧化为二氧化碳；在间歇式反应器中，乙醇的循环流量对乙醇的瞬时降解速率影响不大；高浓度乙醇的低温光催化氧化过程可以用单步Langmuir-Hinshelwood 方程来描述；温度对乙醇光催化氧化的初始反应速率的影响十分显著，高浓度乙醇的初始反应速率随温度的升高而迅速提高。Abstract: Ethanol degradation at room temperature was investigated on a homemade batch reactor using Fourier Transform-Infrared Radiation (FTIR). It was found that FTIR could be used to track the degradation of ethanol. When ethanol molecules were degraded in the batch reactor, they were converted to CO2 via intermediates. One of the intermediates was gaseous acetaldehyde. In the batch reactor, the flux of the mixture had little effect on ethanol degradation rate. The Langmuir-Hinshelwood (L-H) kinetics could be successfully applied to describe the degradation of high concentrate ethanol. The effect of temperature on the degradation of ethanol was significant. With increasing temperature the initial reaction rate of ethanol was increased remarkably.
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Key words:
- photocatalysis /
- ethanol /
- low temperatrue oxidation
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