摘要
在富氧条件下 ,考察了C3 H6和C2 H5OH在Ag/Al2 O3 、In/Al2 O3 、Sn/Al2 O3 、Co/Al2 O3 、Pt/Al2 O3 和Ag/Al2 O3 +Pt/Al2 O3组合催化剂上选择性还原NO的性能 .结果表明 ,Ag/Al2 O3 具有最高的NO还原活性 .在负载型过渡金属氧化物催化剂上 ,会生成显著量的CO ,其HC和CO氧化转化温度也远远高于Pt/Al2 O3 催化剂 .串联组合Ag/Al2 O3 +Pt/Al2 O3 催化剂可显著拓宽活性温度范围 ,促进HC和CO氧化 ,降低N2 O和CH3 CHO生成量 .
Catalytic properties of Ag/Al 2O 3、In/Al 2O 3、Sn/Al 2O 3、Co/Al 2O 3、Pt/Al 2O 3 and a two-stage catalyst composed of Ag/Al 2O 3 and Pt/Al 2O 3 were investigated for the selective reduction of NO by C 3H 6 or C 2H 5OH in excess oxygen. The Ag/Al 2O 3 showed the highest NO reduction activity among the catalysts studied. A substantial amount of CO was formed over alumina-based transient metal oxides. HC and CO oxidations over Pt/Al 2O 3 occurred in relatively low temperatures, compared with the other catalysts. The sequential use of Ag/Al 2O 3 and Pt/Al 2O 3 was effective to broaden the temperature window for the reduction of NO, to improve oxidation of HC and CO and to inhibit the formation of N 2O and CH 3CHO.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2004年第3期26-29,共4页
Environmental Science
基金
国家 8 63计划课题 ( 2 0 0 1AA64 3 0 3 0 )
