BaFeO3-x与Cu-ZSM-5耦合催化剂的NOx储存还原性能

doi:10.3866/PKU.WHXB201406031

Abstract

Abstract:

A BaFeO_3-x+Cu-ZSM-5 coupled catalyst was designed and synthesized to eliminate the NO_x emitted from lean-burn exhausts, providing an alternative to the traditional noble-metal-based NO_x storage reduction (NSR) catalysts. During the lean-burn period, the NO oxidation and storage processes mainly occurred over the BaFeO_3-x catalyst. During the fuel-rich period, the released NO_x from the BaFeO_3-x catalyst was further reduced over the Cu-ZSM-5 catalyst. Our results show that, compared with the BaFeO_3-x and Cu-ZSM-5 catalyst alone, the operating temperature window of the coupled BaFeO_3-x+Cu-ZSM-5 catalyst is extended from 250 to 400 ℃, and its NO_x elimination performance is significantly improved. The maximum NO_x conversion of the coupled catalyst was 98%, while the N₂ selectivity was close to 100%.

Key words: Lean-burn, Coupled catalyst, NO_x, Storage, Reduction

Lü Jiao-Long, LI Feng-Li, LI Xin-Gang. NO_x Storage Reduction Performance of Coupled BaFeO_3-x+Cu-ZSM-5 Catalyst[J]. Acta Phys. -Chim. Sin. 2014, 30(8), 1550-1558. doi: 10.3866/PKU.WHXB201406031

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NO_x Storage Reduction Performance of Coupled BaFeO_3-x+Cu-ZSM-5 Catalyst

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NO_x Storage Reduction Performance of Coupled BaFeO_3-x+Cu-ZSM-5 Catalyst