One pot synthesis of supported perovskytes to induce energy effects in catalytic VOCs combustion
Résumé
Environmental protection standards with respect to air pollutants such as volatile organic compounds (VOCs) are becoming increasingly stringent [1] a) D1999/13/CE European Council (March 11, 1999) b) D1882/2003 European Council (September 29, 2003) ; c) D 2004/42/CE European Council (April 21, 2004). . Also, even at low concentrations, VOCs can adversely affect biological systems and create major dysfunctions. Various technologies exist for eliminating VOCs: either (i) recovery processes that allow VOC reclamation, such as adsorption, absorption or separation; or (ii) destruction processes such as thermal or catalytic oxidation. This last method presents numerous advantages when the VOCs are present in very low quantities and when research is constantly devoted to the formulation of inexpensive catalytic systems that are effective at low temperature. The literature is an abundant source of basic research studies that have made it possible to understand the factors that govern catalytic properties [2]. Above and beyond the intrinsic properties of the elements of the periodic table, the combination of different phases can induce synergy effects that can activate these reactions at lower temperatures. Direct syntheses of active phases on supports that facilitate the migration of surface oxygens can very significantly increase the exchange kinetics at the surface of these solid catalysts. Perspectives in this direction will allow the discovery of new catalysts for the special case of the complete oxidation of organic compounds. Therefore, the aim of this work was to develop supported perovskites over different oxides and mixed oxides supports with different conductive properties, in order to compare their catalytic performance in the toluene total oxidation.