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Vendredi 19 avril 2019

 
         
 

Conférence :

 

An overview on heterogeneous catalysis

Par M. Sébastien Royer

 

 
 

 

Abstract :

 

Several industrial processes involve the use of heterogeneous catalysts. However, different classes of catalysts exists, among them bulk catalysts and supported catalysts. Among the bulk catalysts, perovskite and hexaaluminate phases, having transition metal entering the composition, find extensive use in environmental processes, being proposed for oxidation (CO, CH4, VOCs) and reduction reaction (NOx). The redox character of the active element stabilized in the structure, being at the origin of the oxygen mobility, confers an activity to the catalyst. Recent approaches to produce material with stable porosities and consequently improved surface areas, in order to optimize activities, will be reviewed. For the supported catalysts, the key to reach active catalysts concerns the obtaining of stable divided phases (stabilization of supported NPs). Dispersion can be modulated using various strategies of synthesis, from classical incipient wetness impregnation (and controlled drying) to more recent approached as melt infiltration. Example of the impact of NPs dispersion and stabilization in porous supports will be given for hydrogenation reactions over metallic (Ni, Cu, Co) catalysts.

 

Sebastien Royer is currently Professor at the University of Lille, ́ France, and supervises the “Catalytic Material’ group in UCCS UMR CNRS 8181 laboratory. He has specialized in the preparation of catalytic materials, with original synthesis approaches developed to produce nanocrystalline mixed oxides and porous supports and to stabilize divided active phases. He obtained his Ph.D. in Chemical Engineering from Laval University in 2004 and subsequently held an Associate Professor position in the IC2MP UMR CNRS 7285 laboratory-University of Poitiers until 2015. He has coauthored over 100 scientific articles and 80 presentations in national and international conferences.

 

     
         
 

 

 

 

M. Sébastien Royer

 

Professeur, UMR 8181-UCCS-Unité de Catalyse et Chimie du Solide, Université de Lille, F-59000 Lille, France. F-59000 Lille, France.

 

Université Euromed de Fès , 10h00.

 

 


 
         
         
     
         
 
 
 
 
 
 
 
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