Article (Scientific journals)
VOCs catalytic removal over hierarchical porous zeolite NaY supporting Pt or Pd nanoparticles
El Khawaja, Rebecca; Sonar, Shilpa; Barakat, Tarek et al.
2022In Catalysis Today
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Keywords :
General Chemistry; Catalysis
Abstract :
[en] The present work reports the impregnation of palladium (Pd) or platinum (Pt) on hierarchical porous zeolite catalysts for Volatile Organic Compounds (VOCs) oxidation. The hierarchical porous zeolite (NaYmod) was synthesized via a top-down approach to incorporate mesoporosity into the microporous zeolite NaY. This process was achieved through a three steps synthesis: dealumination, desilication and alkaline treatment. 0.5 wt% of Pd and Pt precursors were then added to NaY and NaYmod supports by wet impregnation in order to elaborate efficient catalysts for the total oxidation of two types of VOCs, ethanol and toluene, which are probe molecules for oxygenated VOCs and BTEX compounds respectively. The supported and unsupported samples were char- acterized by X-Ray Diffraction (XRD), N2-physisorption, Transmission Electron Microscopy (TEM), and X-Ray Photoelectron Spectroscopy (XPS). The modified mesostructured support ensures a better dispersion of the active phases and led to a partial presence of highly reactive Pt(II) species in the case of platinum-based samples. Whatever the oxidation reaction, these latter demonstrate higher conversions compared to palladium-based ones. The presence of Pt(II) species provided a high catalytic performance, with a total degradation of both VOC probe molecules at temperatures lower than 170 ◦ C. Such temperatures have not been recorded before for NaY sup- ported materials.
Disciplines :
Chemical engineering
Chemistry
Energy
Author, co-author :
El Khawaja, Rebecca
Sonar, Shilpa
Barakat, Tarek
Heymans, Nicolas  ;  Université de Mons - UMONS > Faculté Polytechnique > Service de Thermodynamique, Physique mathématiques
Su, Bao-Lian
Löfberg, Axel
Lamonier, Jean-François
Giraudon, Jean-Marc
De Weireld, Guy ;  Université de Mons - UMONS > Faculté Polytechnique > Service de Thermodynamique, Physique mathématiques
Poupin, Christophe
Cousin, Renaud
Siffert, Stéphane
Language :
English
Title :
VOCs catalytic removal over hierarchical porous zeolite NaY supporting Pt or Pd nanoparticles
Publication date :
16 May 2022
Journal title :
Catalysis Today
ISSN :
0920-5861
eISSN :
1873-4308
Publisher :
Elsevier BV
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
13. Climate action
Research unit :
Thermodynamics and Mathematical Physics
Research institute :
Energie
Name of the research project :
3145 - DepollutAir - Couplages innovants de techniques de traitement des Composés Organiques Volatils - Sources publiques européennes
Funders :
Interreg France-Wallonie-Vlaanderen [BE]
Funding number :
1.1.18
Funding text :
The “DepollutAir” project (grant number 1.1.18) of the European Program INTERREG V France-Wallonie-Vlaanderen (European Regional Development Fund (ERDF), Europe), R ́egion Wallone (Belgium) and R ́egion Hauts-de-France (France) are acknowledged for the funding and their support for this work.
Available on ORBi UMONS :
since 25 May 2022

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