Promotion effect of surface Lanthanum in soot oxidation over ceria-based catalysts

被引：24

作者：

Aneggi, Eleonora ^{[1
]}

de Leitenburg, Carla ^{[1
]}

Dolcetti, Giuliano ^{[1
]}

Trovarelli, Alessandro ^{[1
]}

机构：

[1] Univ Udine, Dipartimento Sci & Tecnol Chim, I-33100 Udine, Italy

来源：

TOPICS IN CATALYSIS | 2007年 / 42-43卷 / 1-4期

关键词：

ceria; zirconia; alumina; lanthana; oxygen storage; soot oxidation; diesel; combustion;

D O I：

10.1007/s11244-007-0198-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In the present work the soot combustion activity of CeO2 doped with lanthanum hydroxide, as surface promoter, has been investigated. TGA experiments, run under different conditions, show that, in the presence of lanthana, the reaction of soot starts at low temperature (579 K) due to the possibility to form carbonate species. The emission of CO2 is delayed due to the strong interaction with lanthana. A mechanism of reaction involving a carbonate route is proposed.

引用

页码：319 / 322

页数：4

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