The analysis of radiative transfer in photoreactors is often crucial for operating efficient photoreactions. This article aims to present a complete experimental and theoretical coupled approach allowing radiative transfer analysis of photoreactors containing particulate media. TiO₂ powder, widely used in photocatalysis, was selected as a case study material for this work. First, Mie theory was used and adapted to assess the effective properties of heterogenous powders. A home-made experimental bench allowing normal-hemispheric transmittance measurement was settled. Theoretical and experimental evaluations of the radiative properties were compared and appear to match each other. The second part of the work consisted in both transmittance and local radiant energy modeling through Monte Carlo and Two Flux models using the previously defined radiative properties as entry parameters. The comparison of experimental and modeled transmittance highlighted the consistence of these models which were then used to describe the radiant energy evolution inside a parallel-plane photoreactor.

光反应器中辐射传递的分析通常对于有效运行光反应至关重要。本文旨在介绍一种完整的实验和理论耦合方法，可以对包含颗粒介质的光反应器进行辐射转移分析。二氧化钛₂选择广泛用于光催化的粉末作为这项工作的案例研究材料。首先，使用米氏理论并将其应用于评估异质粉末的有效性能。安置了允许进行正常半球透射率测量的自制实验台。对辐射特性的理论和实验评估进行了比较，并且看起来相互匹配。工作的第二部分包括使用先前定义的辐射特性作为输入参数，通过蒙特卡洛和两个通量模型对透射率和局部辐射能进行建模。实验透射率和建模透射率的比较突出了这些模型的一致性，然后将这些模型用于描述平行平面光反应器内部的辐射能演化。