NH3-Selective Catalytic Reduction of NOx to N2 over Ceria Supported WOx Based Catalysts: Influence of Tungsten Content
| Autor: | Cuirong Chen, Mostafa Taoufik, Imane El Arrouji, Jamil Toyir, Kai C. Szeto, Abdallah Oulmekki, Aimery De Mallmann, Cherif Larabi |
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| Přispěvatelé: | Catalyse, Polymérisation, Procédés et Matériaux (CP2M), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie, Catalyse, Polymères et Procédés, R 5265 (C2P2) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
12-tungstophosphoric acid chemistry.chemical_element 02 engineering and technology TP1-1185 [CHIM.INOR]Chemical Sciences/Inorganic chemistry Tungsten 010402 general chemistry 01 natural sciences Catalysis chemistry.chemical_compound symbols.namesake Tungstate Physisorption [CHIM.COOR]Chemical Sciences/Coordination chemistry Physical and Theoretical Chemistry tungsten monomeric QD1-999 NOx Chemical technology Selective catalytic reduction [CHIM.CATA]Chemical Sciences/Catalysis [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences ceria [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry Chemistry [CHIM.POLY]Chemical Sciences/Polymers chemistry DeNOx symbols 0210 nano-technology Selectivity Raman spectroscopy Nuclear chemistry |
| Zdroj: | Catalysts, Vol 11, Iss 950, p 950 (2021) Catalysts Catalysts, MDPI, 2021, 11 (8), pp.950. ⟨10.3390/catal11080950⟩ Volume 11 Issue 8 |
| ISSN: | 2073-4344 |
| DOI: | 10.3390/catal11080950⟩ |
| Popis: | A series of HPW/CeO2 catalysts generated from 12-tungstophosphoric acid, H3PW12O40 (HPW), supported on ceria and presenting different tungsten loadings (2, 4.5, 9, 16, and 40 wt% W) were prepared and characterized by N2 physisorption, XRD, IR, Raman, and UV-Vis. The different characterization techniques suggested that low loading of tungsten resulted in mainly isolated sites, while high tungsten loading produced polymeric or tungsten clusters. Those materials exhibited high activity in NH3-SCR of NOx into N2. Moreover, the series of experiments indicated that low loading in tungsten (2% HPW/CeO2) displayed the highest activity with a remarkable N2 selectivity (99%) at medium-high temperature (300–515 °C), owing to the high amount of monomeric tungstate coverage on the catalyst surface. |
| Databáze: | OpenAIRE |
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