Removal of N-Methyl-2-pyrrolidone by Photocatalytic Degradation in a Batch Reactor

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• 作者：Alireza Zolfaghari ; Hamid Reza Mortaheb ; Fatemeh Meshkini
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：August 17, 2011
• 年：2011
• 卷：50
• 期：16
• 页码：9569-9576
• 全文大小：994K
• 年卷期：v.50,no.16(August 17, 2011)
• ISSN：1520-5045

文摘

Photocatalytic degradation of N-methyl-2-pyrrolidone (NMP) was investigated in an aerated UV/TiO₂ batch system. The effects of TiO₂ photocatalyst loading, temperature, pH, initial concentration, and the type of gas phase on the reaction rate were ascertained, and the optimum conditions for the maximum degradation rate were determined. The results showed that photocatalytic degradation of NMP is strongly influenced by these parameters. The optimum TiO₂ loading, which provides enough surface area for reaction without irradiation loss due to scattering of UV light, was found to be 0.1 wt %. It was revealed that due to bilateral effect of temperature on the process, the maximum oxidation rate (0.22 min^鈥?) is obtained at 45 掳C. The highest photodegradation reaction rate is obtained in neutral or slightly acidic condition rather than in extreme acidic or alkaline range. The pseudo-first-order reaction rate expression based on Langmuir鈥揌inshelwood model can reasonably simulate the photocatalytic degradation process. The optimum values for TiO₂ photocatalyst loading, temperature, and pH were confirmed by economic factor analysis based on electrical energy consumption.