CATALYTIC COMBUSTION OF METHANE OVER UNSUPPORTED AND γ-Al_2O_3 SUPPORTED Sr_2FeTaO_6 and Sr_2Fe_(0.7)Co_(0.3)TaO_6 DOUBLE PEROVSKITES

摘要

Sr_2FeTaO_6 and Sr_2Fe_(0.7)Co_(0.3)TaO_6 double perovskites, unsupported and supported on γ-Al_2O_3 were prepared, characterized and studied in the catalytic combustion of methane, as a test reaction for volatile organic compounds (VOCs) destruction. These mixed oxides, with double perovskite structure, present good catalytic activities, and after their dispersion-5 % (wt.)-on γ-Al_2O_3 support, the reaction rates increased compared with the unsupported samples.