Abstract
Selective reduction of NO with C3H6 under an oxidizing atmosphere was studied over various Cu ion-exchanged molecular sieves. All examined Cu ion-exchanged catalysts are active for NO reduction with C3H6 in a large excess of O2; however, the temperature at the maximum NO conversion depends on the kind of molecular sieves. In particular, it was found that Cu-SAPO-34 is sometimes more active than Cu-ZSM-5. Thermal stability of SAPO-34 was extremely high, and consequently, decrease in the activity to NO selective reduction on Cu-SAPO-34 was negligible over 60 h at 673 K in an atmosphere containing 15 vol % H2O. After thermal treatment at 1073 K in a humidified atmosphere, decrease in the activity to NO reduction was also small. Although the activity of Cu-SAPO-34 to NO reduction was decreased slightly with the coexistence of SO2, it is expected that the activity of Cu-SAPO-34 is sustained over a long period.
Original language | English |
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Pages (from-to) | 17-22 |
Number of pages | 6 |
Journal | Industrial and Engineering Chemistry Research |
Volume | 36 |
Issue number | 1 |
DOIs | |
Publication status | Published - Jan 1997 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering