Role of organic nitro compounds in selective reduction of NOx with ethanol over different supported silver catalysts

被引：51

作者：

Kameoka, S ^{[1
]}

Chafik, T ^{[1
]}

Ukisu, Y ^{[1
]}

Miyadera, T ^{[1
]}

机构：

[1] Natl Inst Resources & Environm, Thermal Energy & Combust Engn Dept, Tsukuba, Ibaraki 3058569, Japan

来源：

CATALYSIS LETTERS | 1998年 / 51卷 / 1-2期

关键词：

selective reduction of NOx; supported silver catalyst; support effect; nitromethane; nitroethane;

D O I：

10.1023/A:1019041118880

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 organic nitro compounds such as nitromethane and nitroethane on different supported silver catalysts (Ag/Al2O3, Ag/TiO2, Ag/SiO2) has been studied using infrared spectroscopy. The adsorbed NCO species formation was strongly influenced by the catalyst support and therefore clearly detected on Ag/Al2O3 and Ag/TiO2 catalysts by thermal decomposition of nitromethane and nitroethane at temperatures higher than 150 degrees C. With the Ag/SiO2 catalyst, very little NCO formation was observed at 350 degrees C. On the other hand, the catalyst support was found to affect the N-2 formation in the selective reduction of NOx on supported silver catalysts. On the basis of these findings, the role of adsorbed nitromethane, nitroethane and isocyanate species in the selective reduction of NOx is discussed with respect to the catalyst support effect and the catalytic activity.

引用

页码：11 / 14

页数：4

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