Bed flow photoreactor experiments to assess the photocatalytic nitrogen oxides abatement under simulated atmospheric conditions
| Autor: | Christian George, Antoinette Boreave, M. Gallus, S. Ifang, Benjamin Golly, F. Mothes, Ralf Kurtenbach, J. Kleffmann, Hartmut Herrmann |
|---|---|
| Přispěvatelé: | IRCELYON-Catalytic and Atmospheric Reactivity for the Environment (CARE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
010504 meteorology & atmospheric sciences NOx 010501 environmental sciences 01 natural sciences Catalysis Heterogeneous photocatalysis chemistry.chemical_compound Nitrate 11. Sustainability Mixing ratio Relative humidity 0105 earth and related environmental sciences General Environmental Science Pollutant Bed flow reactor Process Chemistry and Technology [CHIM.CATA]Chemical Sciences/Catalysis [SDE.ES]Environmental Sciences/Environmental and Society Volumetric flow rate Light intensity chemistry Chemical engineering 13. Climate action Photocatalysis Cement-based material Titanium dioxide |
| Zdroj: | Applied Catalysis B: Environmental Applied Catalysis B: Environmental, Elsevier, 2018, 231 (---), pp.161-172. ⟨10.1016/j.apcatb.2018.03.010⟩ |
| ISSN: | 0926-3373 |
| DOI: | 10.1016/j.apcatb.2018.03.010⟩ |
| Popis: | Small scale bed flow photoreactor experiments were performed to assess the photocatalytic performance of cement-based TiO2-containing materials for NOx reduction through the determination of kinetic parameters under variation of the experimental conditions (relative humidity, flow rate, mixing ratio and light intensity) and monitoring of potential reaction products in the gas phase and the aqueous extract of the surface. The results clearly demonstrated the general potential of the tested material to photocatalytically remediate gas phase NOx by conversion into nitrite and nitrate as identified reaction products at the surface. The measured uptake coefficients for NO and NO2 under atmospheric relevant conditions were in the range of 5 × 10−5 with a corresponding surface deposition velocity of about 0.5 cm s−1. However, it became also clear that the photocatalytic activity is in part significantly dependent on the experimental conditions. The relative humidity and the mixing ratio of the air pollutant were identified as the most important parameters. In addition, under certain conditions, a renoxification process can occur. The comprehensive results of the present study are discussed in detail to develop recommendations for a possible future application of this technique to improve urban air quality. |
| Databáze: | OpenAIRE |
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