This contribution aims at developing engineering approaches to characterize radiative transfer and kinetics of a catalyst to be activated by electromagnetic radiation, one of the main bottlenecks when evaluating materials in heterogeneous photocatalytic processes. A specialized LED‐based photoreactor is engineered to obtain reliable information on the aforementioned mechanisms. The radiative transfer approach serves as a criterion to elucidate the capability of a catalyst to be activated or not by visible light or UV‐A light. When the catalyst favours the absorption of photons rather than their scattering or transmission, the experimental methodology allows the determination of intrinsic optical information being independent of fluid dynamics, and catalyst concentration. Radiative characterization, along with a mass transfer analysis, guides the proposal of the operational design of the photoreactor to carry out intrinsic kinetic studies. Thus, the operation of the photoreactor under pseudo‐isoactinic and differential reaction conditions leads to the determination of intrinsic initial reaction rates, enabling the understanding of the complex interaction among the optical properties of the catalyst, the reaction rate for the production of hydroxyl radicals (^•OH), and the oxidation of a recalcitrant organic pollutant. The procedures assessed are worthy of being used for evaluating other materials, activated at different wavelength ranges or designed for different photocatalytic applications, paving the way for the scale‐up of the reactor, another of the main challenges in photocatalysis.

中文翻译：

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关于用于辐射和动力学研究的实验室基于LED的光催化反应器的工程设计

该贡献旨在开发工程方法，以表征通过电磁辐射活化的催化剂的辐射传递和动力学，这是在非均相光催化过程中评估材料时的主要瓶颈之一。经过专门设计的基于LED的光反应器，旨在获得有关上述机制的可靠信息。辐射转移方法可作为一种标准，以阐明催化剂被可见光或UV-A光活化或不活化的能力。当催化剂促进光子的吸收而不是光子的散射或透射时，实验方法可以确定固有的光学信息，而与流体动力学和催化剂浓度无关。辐射表征以及传质分析，指导光反应器操作设计的建议以进行内在动力学研究。因此，光反应器在假等规和差异反应条件下的操作导致确定固有的初始反应速率，从而使人们能够理解催化剂的光学性质之间的复杂相互作用，产生羟基自由基的反应速率（^• OH），以及顽固性有机污染物的氧化。评估的程序值得用于评估其他材料，在不同波长范围内激活或针对不同的光催化应用而设计，这为扩大反应器规模铺平了道路，这是光催化的另一个主要挑战。