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Study on catalysts for combustion of lean CH_4

Study on catalysts for combustion of lean CH_4
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摘要 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%. 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%.
出处 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 1994年第1期62-68,共7页 环境科学学报(英文版)
关键词 CATALYSTS ABO_3 structure oxides catalytic combustion lean CH. oxidation. catalysts, ABO_3 structure oxides, catalytic combustion, lean CH. oxidation.
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