Co-Mg-Al Hydrotalcite Precursors for Catalytic Total Oxidation of Volatile Organic Compounds

Co-Mg-Al hydrotalcite type solids were synthesized as precursors of catalysts for the total oxidation of toluene. After calcination at 500 A degrees C, different mesoporous mixed oxides were obtained with high specific surfaces. The comparison of the catalytic activities of the calcined hydrotalcites with those of calcined hydroxides evidenced the superiority of the first oxides explained meanly by higher specific surfaces and more easily reducible particles. DRIFT operando allowed to follow the oxidation reaction and the formation of light coke and carbonate species.