Advanced Pd/CexZr(1-x)O2/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Imen Ben Saïd; Khouloud Sadouki; Sylvie Masse; Thibaud Coradin; Leila Samia Smiri; Shemseddine Fessi

doi:10.1016/j.micromeso.2016.10.044

Advanced Pd/Ce_xZr_(1-x)O₂/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings

Imen Ben Saïd ^{1, *} Khouloud Sadouki ² Sylvie Masse ^{3, *} Thibaud Coradin ³ Leila Samia Smiri ¹ Shemseddine Fessi ⁴

* Corresponding author

1 Université de Carthage - University of Carthage

2 Laboratoire de Chimie des Matériaux et Catalyse

3 MATBIO - Matériaux et Biologie

LCMCP - Laboratoire de Chimie de la Matière Condensée de Paris

4 UTM - Université Tunis El Manar

Abstract : Pd/(Ce x Zr (1-x) O 2)/MCM-41 catalysts containing variable loadings of Ce and Zr with fixed molar ratio Ce/Zr=1/2 are prepared by impregnation. Synthesized MCM-41, Pd(acac) 2 , Ce(NO 3) 3 .6H 2 O and Zr(acac) 4 are used as chemicals. The effect of Ce and Zr contents on the textural, structural and catalytic properties of the prepared catalyst is studied. N 2-physisorption, H 2-chimisorption, XRD, TEM-EDX and TPR are the main techniques used to characterize these catalysts. The obtained results show that Ce and Zr addition impacts differently the surface area, porosity and particle sizes of the Pd/(Ce x Zr (1-x) O 2)/MCM-41 catalysts, depending on the variable amount of Ce and Zr. A huge enhancement in the methane combustion activity is obtained.

Keywords : Pd/(Ce x Zr (1-x) O 2 )/MCM-41 catalysts Catalytic activity Methane combustion

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Chemical Sciences / Catalysis

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Advanced Pd/Ce_xZr_(1-x)O₂/MCM-41 catalysts for methane combustion: Effect of the zirconium and cerium loadings