Ultraviolet photocatalytic oxidation (UV-PCO) is a promising gaseous volatile organic compounds (VOCs) elimination method, of which the PCO kinetics are closely related to the radiation and airflow (contaminants) fields. Mathematical models have been developed in extensive studies to demonstrate the PCO kinetic reactions. Computational fluid dynamics (CFD) simulation was also carried out to display the irradiance and flow fields in the reactor. However, it still lacks an in-depth understanding of the light and mass transfer within the porous film coating where the microscopic structures dominate. To close this gap, this paper concentrates on the development of mathematical models for describing the light propagation, mass transfer, and reaction kinetics within the porous film coating. Incorporated with a CFD model for solving the mass, momentum and energy conservation, the sophisticated PCO process in the reactor can be accurately reproduced. The developed models have been validated by the experimental data, and are comparable with other models in the literature. The developed numerical models provide the implications of mass transfer for film coating UV-PCO reactor design.

中文翻译：

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用于空气净化的UV-PCO反应器的改进数值模型

紫外线光催化氧化（UV-PCO）是一种很有前途的气态挥发性有机化合物（VOC）消除方法，其PCO动力学与辐射和气流（污染物）领域密切相关。在广泛的研究中已经开发出数学模型以证明PCO动力学反应。还进行了计算流体动力学（CFD）模拟，以显示反应堆中的辐照度和流场。然而，它仍然缺乏对微观结构占主导的多孔膜涂层内的光和质量传递的深入了解。为了弥合这一差距，本文集中在数学模型的开发上，以描述多孔膜涂层内的光传播，传质和反应动力学。结合了CFD模型来解决质量问题，动量和能源节约，可以精确地复制反应堆中复杂的PCO工艺。所开发的模型已经通过实验数据进行了验证，并且可以与文献中的其他模型进行比较。所开发的数值模型为膜涂层UV-PCO反应器设计提供了传质的含义。