Selective catalytic reduction of nitric oxide with ammonia on copper(II) ion-exchanged offretite

被引：13

作者：

Arous, W

Tounsi, H

Djemel, S

Ghorbel, A

Delahay, G

机构：

[1] ENSCM, CNRS, UMR 5618, Lab Mat Catalyt & Catalyse Chim Organ, F-34296 Montpellier, France

[2] Fac Sci Tunis, Dept Chim, Lab Chim Mat & Catalyse, Tunis 1060, Tunisia

来源：

CATALYSIS COMMUNICATIONS | 2005年 / 6卷 / 04期

关键词：

selective catalytic reduction; nitric oxide; ammonia; copper; zeolite; offretite;

D O I：

10.1016/j.catcom.2005.01.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Copper K-offretite catalysts prepared by ion exchange were characterized by XRD, H-2-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 N-2 is reached above 340 degrees C at a volume space velocity of 332,000 h(-1). 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 deNO(x) efficiency over the whole range of temperature. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：281 / 285

页数：5

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