Direct decomposition of nitrogen monoxide over Cu-MFI containing rare-earth elements: Sm and Gd as promoter

被引：13

作者：

Yahiro, Hidenori ^{[1
]}

Nagano, Tatsuya ^{[1
]}

Yamaura, Hiroyuki ^{[1
]}

机构：

[1] Ehime Univ, Fac Engn, Dept Appl Chem, Matsuyama, Ehime 7908577, Japan

来源：

CATALYSIS TODAY | 2007年 / 126卷 / 3-4期

关键词：

Cu-ZSM-5; NO decomposition; rare-earth metal; samarium; gadolinium; temperature-programmed reduction;

D O I：

10.1016/j.cattod.2007.06.003

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The decomposition activities of nitrogen monoxide (NO) were investigated for the copper ion-exchanged ZSM-5 zeolites (Cu-MFI) containing the rare-earth elements: La, Ce, Pr, Nd, Sm, and Gd. It was found that Sm and Gd acted as promoter for NO decomposition over Cu-MFI with 60-70% of the exchange level of copper ion, while the addition of the other rare-earth elements to Cu-MFI showed no positive effect on NO decomposition activity. The introduction of Sm and Gd to Cu-MFI had little influence on the effectiveness of each copper ion for NO adsorption in the MFI zeolite. The presence of Sm and Gd stabilized Cu+ as an active center. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：284 / 289

页数：6

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