TY - JOUR
T1 - Photocatalytic ceramic membrane
T2 - Effect of the illumination intensity and distribution
AU - Heredia Deba, Shuyana A.
AU - Wols, Bas A.
AU - Yntema, Doekle R.
AU - Lammertink, Rob G.H.
N1 - Funding Information:
This work was performed in the cooperation framework of Wetsus, European Centre of Excellence for Sustainable Water Technology (www.wetsus.nl). Wetsus is cofunded by the Dutch Ministry of Economic Affairs and the Ministry of Infrastructure and Environment, the European Union Regional Development Fund, the Province of Fryslân, and the Northern Netherlands Provinces. This work is part of a project that has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement 665874. The authors thank the participants of the research theme “Priority compounds and Virus control” for fruitful discussions and financial support and Eva Portillo for her assistance in part of the experiments of the study.
Funding Information:
This work was performed in the cooperation framework of Wetsus, European Centre of Excellence for Sustainable Water Technology ( www.wetsus.nl ). Wetsus is cofunded by the Dutch Ministry of Economic Affairs and the Ministry of Infrastructure and Environment , the European Union Regional Development Fund , the Province of Fryslân , and the Northern Netherlands Provinces . This work is part of a project that has received funding from the European Union’s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement 665874 . The authors thank the participants of the research theme “Priority compounds and Virus control” for fruitful discussions and financial support and Eva Portillo for her assistance in part of the experiments of the study.
Publisher Copyright:
© 2022 The Author(s)
PY - 2023/3/1
Y1 - 2023/3/1
N2 - 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.
AB - 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.
KW - Irradiation intensities
KW - Mono and multi-LED lamps
KW - Photocatalytic membrane
KW - Spatial radiation distribution
KW - UT-Hybrid-D
UR - http://www.scopus.com/inward/record.url?scp=85145585043&partnerID=8YFLogxK
U2 - 10.1016/j.jphotochem.2022.114469
DO - 10.1016/j.jphotochem.2022.114469
M3 - Article
AN - SCOPUS:85145585043
SN - 1010-6030
VL - 437
JO - Journal of Photochemistry and Photobiology A: Chemistry
JF - Journal of Photochemistry and Photobiology A: Chemistry
M1 - 114469
ER -