Gas‐liquid photoreactions are increasingly implemented in microreactors. Taylor flows containing an inert dispersed phase were previously used to increase the conversion of photochemical reactions in comparison to using a single liquid phase. However, identifying the optimal flow conditions requires an extensive experimental effort. This work aims to understand the photon transport and hydrodynamics in a Taylor flow photo microreactor so that the reactor behavior can be understood and predicted. Chemical actinometry, flow imaging and residence time distribution experiments were used to develop a multi‐region photochemical reaction model. This model shows that the conversion is significantly affected by the liquid distribution, and not by the light scattering or liquid mixing. Moreover, an empirical relation was proposed to predict the optical pathlength in gas‐liquid flows. The knowledge gained in this study helps to optimize the performance of Taylor flow photo microreactors, but also to design improved multiphase flow photochemical systems.

中文翻译：

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气液流动中的光子输运和流体动力学第1部分：光微反应器中泰勒流的表征

气液光反应越来越多地在微反应器中实现。与使用单一液相相比，先前使用包含惰性分散相的泰勒流来提高光化学反应的转化率。但是，确定最佳流动条件需要大量的实验工作。这项工作旨在了解泰勒流动光微反应器中的光子传输和流体动力学，以便可以理解和预测反应器的行为。使用化学光度法，流动成像和停留时间分布实验来建立多区域光化学反应模型。该模型表明，转化率受液体分布的影响很大，而不受光散射或液体混合的影响。此外，提出了一种经验关系来预测气液流中的光程。在这项研究中获得的知识有助于优化泰勒流式微反应器的性能，还有助于设计改进的多相流光化学系统。