On the origin of the optimum loading of Ag on Al2O3 in the C3H6-SCR of NOx - Sorbonne Université Access content directly
Journal Articles Applied Catalysis B: Environmental Year : 2013

On the origin of the optimum loading of Ag on Al2O3 in the C3H6-SCR of NOx

Abstract

Ag/Al2O3 catalysts synthesized by the common impregnation technique with various Ag loadings were characterized by the NOx-Temperature-Programmed Desorption (TPD) method and their catalytic performances were evaluated in the selective catalytic reduction of NOx by propene (C3H6-SCR). It was found that the NOx uptake decreased linearly as the Ag surface density increased up to about View the MathML source and then leveled off. This behavior was attributed to the formation of a pseudo monolayer of Ag2O clusters, i.e. to the maximum loading of silver per unit surface area of Al2O3View the MathML source for which highly dispersed Ag2O clusters are preserved on freshly calcined samples. It was also found that this optimum Ag surface density could be correlated to the catalytic performances in the C3H6-SCR of NOx. The concept of Ag surface density allowed rationalizing some of the earlier results on C3H6-SCR of NOx.

Domains

Catalysis

Dates and versions

hal-00907584 , version 1 (21-11-2013)

Identifiers

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Tesnim Chaieb, Laurent Delannoy, Catherine Louis, Cyril Thomas. On the origin of the optimum loading of Ag on Al2O3 in the C3H6-SCR of NOx. Applied Catalysis B: Environmental, 2013, 142-143, pp.780-784. ⟨10.1016/j.apcatb.2013.06.010⟩. ⟨hal-00907584⟩
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