FeTiO3: A low-cost and efficient photocatalytic mineral for sustainable NOx abatement
This study investigates the potential of FeTiO3 as a photocatalyst for the removal of nitrogen oxides (NOx) from gas streams, a critical environmental and health concern. The photocatalytic activity of FeTiO3 was evaluated across a range of operational parameters, with initial NO concentrations set...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/715996 |
| Acceso en línea: | http://hdl.handle.net/10486/715996 https://dx.doi.org/10.1016/j.seppur.2024.130217 |
| Access Level: | acceso abierto |
| Palabra clave: | NOx Air Pollution Photocatalysis Ilmenite DFT Calculations Química |
| Sumario: | This study investigates the potential of FeTiO3 as a photocatalyst for the removal of nitrogen oxides (NOx) from gas streams, a critical environmental and health concern. The photocatalytic activity of FeTiO3 was evaluated across a range of operational parameters, with initial NO concentrations set from 5 to 50 ppmv and gas hourly space velocity (GHSV) values of 18, 36, and 54 h 1. The findings demonstrate that FeTiO3 effectively converts NOx, even at room temperature and under saturated atmosphere, with a clear correlation between the photocatalytic removal efficiency and both the initial NO concentration and GHSV. A rigorous mechanism for the photooxidation of NO to nitrate via NO2 was proposed based on these experimental results and the surface characterization of raw and used ilmenite, corroborated by DFT calculations. These outcomes would allow widening the application of air pollution control strategies to flue gas with relatively low NOx concentration and low temperature, where other NOx control techniques show severe drawbacks. Therefore, this research contributes to the development of efficient and sustainable approaches for air quality improvement using photocatalytic systems |
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