Transient behaviour of Cu-overexchanged ZSM-5 catalyst in NO decomposition

被引：19

作者：

Pirone, R

Garufi, E

Ciambelli, P

Moretti, G

Russo, G

机构：

[1] UNIV SALERNO, DIPARTIMENTO INGN CHIM & ALIMENTARE, I-84084 FISCIANO, SA, ITALY

[2] UNIV ROMA LA SAPIENZA, DIPARTIMENTO CHIM, CNR, CTR STUDIO SACSO, I-00185 ROME, ITALY

[3] UNIV NAPLES FEDERICO II, DIPARTIMENTO INGN CHIM, I-80125 NAPLES, ITALY

来源：

CATALYSIS LETTERS | 1997年 / 43卷 / 3-4期

关键词：

unsteady-state adsorption; NO adsorption; Cu-ZSM-5; overexchange; redox properties;

D O I：

10.1023/A:1018967328681

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：

The adsorption of NO at 80 degrees C on Cu-overexchanged ZSM-5 (Si/Al = 80) has been investigated in a flow apparatus. The formation of N2O during a transient phase was observed after He pretreatment of the zeolite at 550 degrees C. A negligible amount of N2O was detected, in contrast, from Oz pretreated zeolite. The formation of N2O has been associated to the reoxidation from Cu+ to Cu2+ Of a fraction (about 40%) of copper in the zeolite. The redox chemistry in NO adsorption at low temperature can be related to the activity of Cu-ZSM-5 zeolite in NO decomposition.

引用

页码：255 / 259

页数：5

共 37 条

[1] COADSORPTION OF NITROGEN MONOXIDE AND NITROGEN-DIOXIDE IN ZEOLITIC DE-NOX CATALYSTS [J].