Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10243076 | Catalysis Communications | 2005 | 5 Pages |
Abstract
Copper K-offretite catalysts prepared by ion exchange were characterized by XRD, H2-TPR and evaluated in the selective catalytic reduction of NO (NO-SCR) by ammonia. Despite several successive exchanges, the quantity of copper introduced remains low and the exchange ratio does not exceed 50%. The NO conversion profiles have a sigmoid curve shape. Full NO conversion in N2 is reached above 340 °C at a volume space velocity of 332,000 hâ1. N2O formation at low temperature is due to the presence of small oxide particles generated by the successive copper exchanges during the preparation. The presence of K ions “blocks” the cancrinite access to copper ions and maintains the deNOx efficiency over the whole range of temperature.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
W. Arous, H. Tounsi, S. Djemel, A. Ghorbel, G. Delahay,