The role of NO2 in the reduction of NO by hydrocarbon over Cu-ZrO2 and Cu-ZSM-5 catalysts |
| |
| Authors: | K. A. Bethke C. Li M. C. Kung B. Yang H. H. Kung |
| |
| Affiliation: | (1) Center for Catalysis and Surface Science and Ipatieff Laboratory, USA;(2) Department of Chemistry, Northwestern University, 60208 Evanston, IL, USA;(3) Chemical Engineering, Northwestern University, 60208 Evanston, IL, USA |
| |
| Abstract: | The reduction of NO
x
with propene or propane in the presence of 1 or 4% O2 was studied at low conversions over a 7.4 wt% Cu-ZrO2 and a 3.2 wt% Cu-ZSM-5 catalyst. The rates of N2 production were compared in experiments using only NO or a mixture of NO and NO2 in the feed. They were also compared with the rates of NO2 reduction to NO under the same conditions, and of NO oxidation to NO2 in the absence of hydrocarbon. It was found that the reduction of NO2 to NO was very fast, consistent with literature data. The data were best explained by a reaction scheme in which the hydrocarbon was activated primarily by reaction with adsorbed NO2 to form an adsorbed oxidized N-containing hydrocarbon intermediate, the reaction of which with NO was the principal route to produce N2 under lean NO
x
conditions.On leave from State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, PR China. |
| |
| Keywords: | NO
x
reduction, NO2 in Cu-ZSM-5, lean NO
x
reduction on Cu-ZrO2, lean NO
x
reduction on NO oxidation |
| 本文献已被 SpringerLink 等数据库收录！ |
|
