Activity Enhancement of Pt/Ba/Al2O3 Mixed with Mn/Ba/Al2O3 for NOx Storage-reduction by Hydrogen

被引：0
|
作者：
Jian Hua XIAO
机构：
来源：
Chinese Chemical Letters | 2006年 / 10期
关键词：
Nitrogen oxides; storage-reduction; lean burn; Pt/Ba/Al2O3; Mn/Ba/Al2O3;
D O I：
暂无
中图分类号：
O643.36 [催化剂];
学科分类号：
081705 ;
摘要：
Mn/Ba/Al2O3 catalyst for NO oxidation-storage and Pt/Ba/Al2O3 catalyst mixed with Mn/Ba/Al2O3 for NOx storage-reduction by hydrogen were investigated. The results showed that Mn/Ba/Al2O3 had large nitrogen oxides storage capacity (397.9 μmolg-1) under lean burn condition. When Pt/Ba/Al2O3 catalyst was mixed with Mn/Ba/Al2O3 in equal weight proportion, the NOx conversion increased between 250 ℃ and 500 ℃ under the dynamic lean-rich burn conditions, and the maximum NOx conversion increased from 95.4% to 98.2%. Mn/Ba/Al2O3 has promoted NOx storing in the lean stage and improved NOx reduction efficiency in the rich stage, these might result in higher NOx conversion over the low Pt loading content catalyst.
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收藏
页码：1357 / 1360
页数：4
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