Indoor air quality (IAQ) gained great attention in the last years as one of the foremost environmental concerns and it is therefore imperative that effective methods are developed to conserve IAQ. Currently, the novel technology photocatalytic oxidation (PCO) is a potential alternative. A photocatalyst can be applied to a wide range of building material and easily activated with visible light. Despite the possibilities, several issues require attention. First of all, the photocatalytic degradation of indoor pollutants can generate hazardous intermediates and, furthermore, the low efficiencies of the current PCO applications need to be improved. For the moment, research is focused on controlling, analyzing and improving PCO technology, through for example photocatalyst material development, degradation pathways and kinetics studies, reactor development, application development and PCO modeling. PCO modeling in the indoor environment can provide additional understanding of the performance of a photocatalyst in complex environments and can support in the optimization of indoor design, including lighting plans and ventilation strategies. This article focused on the simulation of radiation, since it highly defines the excited electron-hole pair amount that triggers pollutant oxidation. The radiation field in any system can be modeled either by a physical approach, based on electromagnetic wave theory, or by more conventional geometric optical methods. The geometric optical methods, including ray-tracing (forward or backward) or radiosity methods, are frequently employed for lighting design and energy simulation within the built environment and are likewise suitable for indoor PCO modeling. In this article, a previously developed kinetic model is improved through simulation of the experimental photoreactor setup (in line with ISO 22197-1 :2007), using the backward ray-tracing modeling method in the RADIANCE lighting simulation tool. During the kinetic model development, the radiation field behavior in the photoreactor setup was not considered. Consequently, a correction factor was derived from the computer simulations to correct for the behavior of the radiation field in the setup. The reflection of the glass cover and the testing sample influenced the amount of irradiance received by sample surface in the photoreactor setup. While in earlier work, the reflection of the sample limited the irradiance reduction of the glass cover to 1.4%, darker substrates could lead to an overestimation up to 9.8% when used in the same setup. This overestimation could introduce a considerable error into the kinetic model. The results from this study can be used to refine photocatalytic oxidation modeling. It is believed that method can be used to refine other kinetic models and may aid in making PCO models more accurate in future work. Also, RADIANCE may be used for PCO modeling in the indoor environment.
|Status||Gepubliceerd - 2013|
|Evenement||conference; The 3rd European Symposium on Photocatalysis; 2013-09-25; 2013-09-27 - |
Duur: 25 sep 2013 → 27 sep 2013
|Congres||conference; The 3rd European Symposium on Photocatalysis; 2013-09-25; 2013-09-27|
|Periode||25/09/13 → 27/09/13|
|Ander||The 3rd European Symposium on Photocatalysis|
Bibliografische notaProceedings of JEP 2013 : the 3rd European Symposium on Photocatalysis, 25-27 September 2013, Portoroz, Slovenia
Pelzers, R. S., Yu, Q., Mangkuto, R. A., & Brouwers, H. J. H. (2013). Employing RADIANCE to refine indoor photocatalytic oxidation modeling. 3-30-. Postersessie gepresenteerd op conference; The 3rd European Symposium on Photocatalysis; 2013-09-25; 2013-09-27, .