in this study, cerarnics honeycomb-supported ABO_3 perovskite type oxides were preparedby changing the composition of A and B site cations, and observed their activities for lean CH.oxidation. In the case of change in...in this study, cerarnics honeycomb-supported ABO_3 perovskite type oxides were preparedby changing the composition of A and B site cations, and observed their activities for lean CH.oxidation. In the case of change in A site composition La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_3MnO_3 is the mostactive catalysts for 1 v% CH_4 and 2 v% CH_4 respectively. But LaMn_(0.5)Co_(0.5)O_3 oxide is the best ac-tive catalyst for 1-2v% CH_4 among the oxides by changing B site compositions of LaBO_3 and su-perior to La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_(0.4)MnO_3 catalysts.Adding trace Pd improved the activity and characteristics of space velocity for LaMn_(0.5)CO_(0.5)O_3and La_(0.3)Sr_(0.2)MnO_3 Although LaMn_(0.5)Co_(0.5)O_3 +Pd (0.03 wt%) was less active than the Pd catalyst,the activity was more than Pt catalyst at a conversion level below 90%.展开更多
文摘in this study, cerarnics honeycomb-supported ABO_3 perovskite type oxides were preparedby changing the composition of A and B site cations, and observed their activities for lean CH.oxidation. In the case of change in A site composition La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_3MnO_3 is the mostactive catalysts for 1 v% CH_4 and 2 v% CH_4 respectively. But LaMn_(0.5)Co_(0.5)O_3 oxide is the best ac-tive catalyst for 1-2v% CH_4 among the oxides by changing B site compositions of LaBO_3 and su-perior to La_(0.3)Sr_(0.2)MnO_3 and La_(0.6)Sr_(0.4)MnO_3 catalysts.Adding trace Pd improved the activity and characteristics of space velocity for LaMn_(0.5)CO_(0.5)O_3and La_(0.3)Sr_(0.2)MnO_3 Although LaMn_(0.5)Co_(0.5)O_3 +Pd (0.03 wt%) was less active than the Pd catalyst,the activity was more than Pt catalyst at a conversion level below 90%.
