Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10242913 | Catalysis Communications | 2005 | 6 Pages |
Abstract
Activity test and in situ DRIFTS experiments were carried out on the selective catalytic reduction of NOx by propene over Ag (5Â wt%)-Pd (0.01Â wt%)/Al2O3 and Ag (5Â wt%)-Pd (0.01Â wt%)/Al2O3-SiO2. The activity test results showed that the Ag-Pd/Al2O3-SiO2 had a higher NOx conversion than Ag-Pd/Al2O3 in the presence of SO2. The in situ DRIFTS results showed the SO2 poisoned Ag-Pd (0.01Â wt%)/Al2O3 surface inhibited the formation of enolic species and NO3-, which are reactive intermediates to form -NCO species. However, the SO2 poisoned Ag-Pd (0.01Â wt%)/Al2O3-SiO2 surface can hardly affect the formation of enolic species, NO3- and -NCO species. The reaction mechanism of NOx reduction and the effect of adding SiO2 are discussed based on these results.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Jin Wang, Hong He, Shuxia Xie, Yunbo Yu,