1. Influence of the exchanged cation in Pd/BEA and Pd/FAU zeolites for catalytic oxidation of VOCs
- Author
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Giraudon, Jean-Marc, Leclercq, Ginette, Tidahy, H., Siffert, Stéphane, Lamonier, Jean-François, Zhilinskaya, E., Aboukaïs, Antoine, Zuang, Z.-Y., Vantomme, Aurélien, Su, Bao-Lian, Canet, Xavier, de Weireld, Guy, Nguyen, Thanh, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Catalyse et Environnement (LCE), MREI, Université du Littoral Côte d'Opale (ULCO)-Université du Littoral Côte d'Opale (ULCO)-Université du Littoral Côte d'Opale (ULCO), Laboratoire de Chimie des Matériaux Inorganiques (LCMI), Facultés Universitaires Notre Dame de la Paix (FUNDP), Laboratoire de Thermodynamique Physique-Mathématique (LTPM), Faculté polytechnique de Mons, Université de Mons (UMons)-Université de Mons (UMons), FEDER, Interreg3, projet Retrai, and Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille
- Subjects
Inorganic chemistry ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Catalysis ,Exchanged zeolite ,Propene ,chemistry.chemical_compound ,Adsorption ,Zeolite ,General Environmental Science ,Chemistry ,Total oxidation of VOC ,Process Chemistry and Technology ,[CHIM.CATA]Chemical Sciences/Catalysis ,021001 nanoscience & nanotechnology ,Toluene ,Toluene oxidation ,0104 chemical sciences ,Catalytic oxidation ,0210 nano-technology ,Palladium - Abstract
0.5 wt% palladium supported on exchanged BEA and FAU zeolites were prepared, characterized and tested in the total oxidation of volatile organic compounds (VOCs). The BEA and FAU zeolites were exchanged with different cations to study the influence of alkali metal cations (Na+, Cs+) and H+ in Pd-based catalysts on propene and toluene total oxidation. The exchange with different cations (Na+, Cs+) and H+ led to a decrease of the surface area and the micropore volume. All Pd/BEA and Pd/FAU zeolites were found to be powerful catalysts for the total oxidation of VOCs. They were active at low temperature and totally selective for CO2 and H2O. However, their activity depends significantly on the type of zeolite and on the nature of the charge-compensating cation. The activity order for propene and toluene oxidation on FAU catalysts, Pd/CsFAU > Pd/NaFAU > Pd/HFAU, is the reverse of the activity order on BEA catalysts: Pd/HBEA > Pd/NaBEA > Pd/CsBEA. The catalytic activities can be rationalized in terms of the influence of the electronegativity of the charge-compensating cation on the Pd particles, the Pd dispersion, the PdO reducibility and the adsorption energies for VOCs.
- Published
- 2007