| Al2O3为载体的催化剂净化贫燃汽车尾气研究 |
| 摘要点击 2583 全文点击 1927 投稿时间：2003-08-26 修订日期：2003-11-18 |
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| 中文关键词 贫燃 汽车尾气 Al2O3 催化还原 C3H6 C2H5OH |
| 英文关键词 lean-burn automobile exhaust catalytic reduction C3H6 C3H5OH |
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| 中文摘要 |
| 在富氧条件下,考察了C3H6和C2H5OH在Ag/Al2O3、In/Al2O3、Sn/Al2O3、Co/Al2O3、Pt/Al2O3和Ag/Al2O3+Pt/Al2O3组合催化剂上选择性还原NO的性能.结果表明,Ag/Al2O3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/Al2O3催化剂.串联组合Ag/Al2O3+Pt/Al2O3催化剂可显著拓宽活性温度范围,促进HC和CO氧化,降低N2O和CH3CHO生成量. |
| 英文摘要 |
| Catalytic properties of Ag/Al2O3、In/Al2O3、Sn/Al2O3、Co/Al2O3、Pt/Al2O3 and a two-stage catalyst composed of Ag/Al2O3 and Pt/Al2O3 were investigated for the selective reduction of NO by C3H6 or C2H5OH in excess oxygen. The Ag/Al2O3 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/Al2O3 occurred in relatively low temperatures, compared with the other catalysts. The sequential use of Ag/Al2O3 and Pt/Al2O3 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 N2O and CH3CHO. |
