Activity enhancement of Pt/Ba/Al2O3 mixed with Mn/Ba/Al2O3 for NOx storage-reduction by hydrogen

作者：Xiao Jian Hua^*; Li Xue Hui; Deng Sha; Wang Fu Rong; Wang Le Fu

来源：Chinese Chemical Letters, 2006, 17(10): 1357-1360.

• nitrogen oxides
• storage-reduction
• lean burn
• Pt/Ba/Al2O3
• Mn/Ba/Al2O3

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 mu molg(-1)) under lean burn condition. When PL/Ba/Al2O3 catalyst was mixed with Mn/Ba/Al2O3 in equal weight proportion, the NO,, conversion increased between 250 degrees C and 500 degrees C under the dynamic lean-rich burn conditions, and the maximum NO, 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.

• 出版日期2006-10
• 单位华南理工大学