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Photocatalytic oxidation of ketone group volatile organic compounds in an intensified fluidized bed reactor using nano-TiO2/UV process: An experimental and modeling study
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2021-01-29 , DOI: 10.1016/j.cep.2021.108312
Hamid Assadi , Fatemeh Armaghan , Ramezan Ali Taheri

The present study compares the photocatalytic oxidation (PCO) of the ketone group volatile organic compounds (VOCs) in an annular fluidized bed photo-reactor (AFBPR). For this aim, acetone, methyl ethyl ketone (MEK) and methyl isobutyl ketone (MIBK) were chosen as model pollutants. The influences of initial concentration, superficial gas velocity and relative humidity (RH) were studied on both the conversion and mineralization of ketones. The findings showed that the degradation of the studied pollutants in the AFBPR was in a similar range. In contrast to VOC conversion, the mineralization of MIBK was lower than the two other ketones. In the simulation part, an integrated modeling procedure was applied in order to simulate the AFBPR. Simple two-phase (STP), dynamic two-phase (DTP) and generalized bubbling/turbulent (GBT) models were chosen as the hydrodynamic sub-models. These hydrodynamic models were integrated and combined with the desired reaction kinetic sub-models to describe the reactor behaviors. The accuracy of the models was evaluated by the experimental results obtained from this study and the data collected from the literature.



中文翻译:

纳米TiO 2 / UV法强化流化床反应器中酮基挥发性有机物的光催化氧化:实验与模型研究

本研究比较了环形流化床光反应器(AFBPR)中酮基团挥发性有机化合物(VOC)的光催化氧化(PCO)。为此,选择了丙酮,甲乙酮(MEK)和甲基异丁基酮(MIBK)作为模型污染物。研究了初始浓度,表面气体流速和相对湿度(RH)对酮的转化和矿化的影响。研究结果表明,AFBPR中研究的污染物的降解在相似的范围内。与VOC转化相反,MIBK的矿化度低于其他两种酮。在模拟部分中,应用了集成建模过程以模拟AFBPR。简单两相(STP)选择动态两相(DTP)模型和广义冒泡/湍流(GBT)模型作为流体力学子模型。将这些流体动力学模型进行了整合,并与所需的反应动力学子模型进行了组合,以描述反应堆的行为。通过从这项研究中获得的实验结果以及从文献中收集的数据来评估模型的准确性。

更新日期:2021-02-04
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