Effect of calcination temperature on the catalytic activity of Pd/Ce_(0.8)La_(0.2)O_δ/cordierite monolithic catalyst for toluene combustion

摘要

The effect of calcination temperature of the Pd/Ce_(0.8)La_(0.2)O_δ/cordierite monolithic catalysts, prepared by impregnation method, on the catalytic activity for toluene combustion has been investigated. The catalyst calcined at 500 °C exhibits the highest activity, with toluene conversion up to 90 % at 210 °C All samples are characterized by XRD, BET, Raman, and H2-TPR techniques. The characterization results match the behavior of the catalytic activity well. The catalysts present high thermal stability due to the formation of CeO2-La2O3 solid solution. The PdO phase is stable at 1000 °C