A study of the behaviour of Pt supported on CeO2-ZrO2/Al2O3-BaO as NOx storage-reduction catalyst for the treatment of lean burn engine emissions

被引：61

作者：

Liotta, LF

Macaluso, A

Arena, GE

Livi, M

Centi, G

Deganello, G

机构：

[1] CNR, ISMN, I-90146 Palermo, Italy

[2] Univ Palermo, Dipartimento Chim Inorgan, I-90128 Palermo, Italy

[3] Univ Messina, Dipartimento Chim Ind & Ingn Mat, I-98166 Messina, Italy

[4] Univ Bologna, Dipartimento Chim Ind, I-40136 Bologna, Italy

来源：

CATALYSIS TODAY | 2002年 / 75卷 / 1-4期

关键词：

Pt supported catalyst; storage-reduction catalyst; lean burn engine emissions;

D O I：

10.1016/S0920-5861(02)00094-9

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The behaviour of a Pt(1 wt.%) supported on CeO(2)-ZrO(2)(20 wt.%)/Al(2)O(3)(64 wt.%)-BaO(16 wt.%) as a novel NO, storage-reduction catalyst is studied by reactivity tests and DRIFT experiments and compared with that of Pt(1%)-BaO(15 wt.%) on alumina. The former catalyst, designed as a hydrothermally stable sample, is composed of an alumina modified with Ba ions and an overlayer of ceria-zirconia. The results pointed out that during the calcination barium ions migrates over the surface of the catalyst which thus show a good NO, storage-reduction behaviour comparable with that of Pt-BaO on alumina, although Ba ions result much better dispersed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：439 / 449

页数：11

共 18 条

[1] Influence of CO2 on storage and release of NOx on barium-containing catalyst [J].