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

引用本文: Jian Hua XIAO, Xue Hui LI, Sha DENG, Fu Rong WANG, Le Fu WANG. Activity Enhancement of Pt/Ba/Al₂O₃ Mixed with Mn/Ba/Al₂O₃ for NO_x Storage-reduction by Hydrogen[J]. Chinese Chemical Letters, 2006, 17(10): 1357-1360. shu

Citation: Jian Hua XIAO, Xue Hui LI, Sha DENG, Fu Rong WANG, Le Fu WANG. Activity Enhancement of Pt/Ba/Al₂O₃ Mixed with Mn/Ba/Al₂O₃ for NO_x Storage-reduction by Hydrogen[J]. Chinese Chemical Letters, 2006, 17(10): 1357-1360. shu

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

School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640
基金项目:
The National Natural Science Foundation of China (No. 20476032) and Natural Science Foundation of Guangdong Province (No. 030951) are gratefully acknowledged for financial support for this project.

摘要: Mn/Ba/Al₂O₃ catalyst for NO oxidation-storage and Pt/Ba/Al₂O₃ catalyst mixed with Mn/Ba/Al₂O₃ for NO_x 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 bum condition.When Pt/Ba/Al₂O₃ catalyst was mixed with Mn/Ba/Al₂O₃ in equal weight proportion, the NO_x conversion increased between 250℃ and 500℃ under the dynamic lean-rich bum conditions, and the maximum NO_x conversion increased from 95.4% to 98.2%. Mn/Ba/Al₂O₃ has promoted NO_x storing in the lean stage and improved NO_xreduction efficiency in the rich stage, these might result in higher NO_x conversion over the low Pt loading content catalyst.

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English

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

School of Chemical and Energy Engineering, South China University of Technology, Guangzhou 510640
Received Date: 20 April 2006
Fund Project:
The National Natural Science Foundation of China (No. 20476032) and Natural Science Foundation of Guangdong Province (No. 030951) are gratefully acknowledged for financial support for this project.

Abstract: Mn/Ba/Al₂O₃ catalyst for NO oxidation-storage and Pt/Ba/Al₂O₃ catalyst mixed with Mn/Ba/Al₂O₃ for NO_x 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 bum condition.When Pt/Ba/Al₂O₃ catalyst was mixed with Mn/Ba/Al₂O₃ in equal weight proportion, the NO_x conversion increased between 250℃ and 500℃ under the dynamic lean-rich bum conditions, and the maximum NO_x conversion increased from 95.4% to 98.2%. Mn/Ba/Al₂O₃ has promoted NO_x storing in the lean stage and improved NO_xreduction efficiency in the rich stage, these might result in higher NO_x conversion over the low Pt loading content catalyst.

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

English

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

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