Influence of BaO on Pd/Al2O3-based catalysts in C2H4 and CO oxidation as well as in NO reduction

被引：8

作者：

Kolli, T

Rahkamaa-Tolonen, K

Lassi, U

Savimäki, A

Keiski, RL

机构：

[1] Oulu Univ, Dept Proc & Environm Engn, FIN-90014 Oulu, Finland

[2] ECOCAT Oy, Catalyst Res, FIN-90650 Oulu, Finland

[3] Cent Ostrobothnia Polytech, Dept Technol, FIN-67100 Kokkola, Finland

来源：

CATALYSIS TODAY | 2005年 / 100卷 / 3-4期

关键词：

barium oxide (BaO); carbon monoxide; ethene; nitrogen oxides; palladium;

D O I：

10.1016/j.cattod.2004.09.065

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this study, Pd/Al2O3 and Pd/BaO/Al2O3 metallic monoliths were used to investigate the effect of BaO in C2H4 and CO oxidation as well as in NO reduction. A FT-IR gas analyser was used to study the activity of the catalysts. Several activity experiments carried out with dissimilar feedstreams revealed that BaO enhances CO and C2H4 oxidation as well as NO reduction reactions in rich conditions. This effect is due to BaO, which causes a decrease in the ethene poisoning of palladium. In lean conditions BaO is present in the form of Ba(OH)(2) which reacts with oxidised NO releasing water. Therefore, NO was stored during the lean reaction. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：303 / 307

页数：5

共 14 条

[1] A transient kinetic study of the mechanism of the NO/C3H6/O2 reaction over Pt-SiO2 catalysts -: Part I:: Non-steady-state transient switching experiments [J].