cff-version: 1.2.0 abstract: "

The principles and application of heterogeneous photocatalytic processes have gained wide attention, especially to the effectiveness of the process. In this work, a mono and a multi-LED lamp are used to study the impact of the UV light intensity and distribution on the semiconductor surface during the degradation of organic compounds in water. A well-defined scan of the electromagnetic radiation profile on the surface of the membrane was obtained and evaluated. Comparing two lamp configurations with a total photon flux of 210 W.m-2 and using a filtration rate of 9.7 L.m-2.h-1, resulted in 20 % more degradation for the most homogeneous light distribution. Furthermore, the reaction rate relation to the photon flux was also studied, with a surface reaction model that includes possible mass transfer limitations. The surface reaction constant increased linearly with the irradiation intensity for the complete studied range [50 to 550 W.m-2] for the most homogeneous illumination distribution. A less uniform distribution resulted in a less than proportional reaction rate constant with respect to the incident photon flux between 100 and 210 W.m-2. This work adds valuable information to the photocatalysis field to improve the light efficiency in a photoreactor to enhance the degradation of pollutants. 

" authors: - family-names: Heredia Deba given-names: Shuyana orcid: "https://orcid.org/0000-0002-4782-6171" - family-names: Lammertink given-names: Rob orcid: "https://orcid.org/0000-0002-0827-2946" - family-names: Wols given-names: B.A. (Bas) orcid: "https://orcid.org/0000-0002-9264-3673" - family-names: Yntema given-names: Doekle orcid: "https://orcid.org/0000-0002-4432-6577" title: "Data underlying the publication: Photocatalytic ceramic membrane: Effect of the illumination intensity and distribution" keywords: version: 1 identifiers: - type: doi value: 10.4121/21670541.v1 license: CC BY 4.0 date-released: 2022-12-06