Nanosized Pt-perovskite catalyst for the regeneration of a wall-flow filter for soot removal from diesel exhaust gases

被引：22

作者：

Cauda, E ^{[1
]}

Fino, D ^{[1
]}

Saracco, G ^{[1
]}

Specchia, V ^{[1
]}

机构：

[1] Politecn Torino, Dept Mat Sci & Chem Engn, I-10129 Turin, Italy

来源：

TOPICS IN CATALYSIS | 2004年 / 30-1卷 / 1-4期

关键词：

diesel particulate combustion; wall-flow monolith; Pt-La-K-Cr catalyst; perovskite;

D O I：

10.1023/B:TOCA.0000029766.91816.d2

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Perovskite-type catalysts have been investigated for diesel soot combustion: (i) the LaCr0.9O3-delta substoichiometric perovskite, (ii) K-La partially substituted chromites; (iii) Pt added ii-type perovskites. The catalysts prepared showed a progressively higher activity and potential for practical application in diesel particulate traps. Engine bench tests performed on a SiC wall-flow trap (Ibiden) lined with the La0.9K0.1Cr0.9O3-delta + 1 wt%Pt catalyst showed that the catalyst not only speeds up soot combustion On occasional trap heating (regeneration phase) but also prolongs the trap loading phase (soot accumulation during normal operation) as Pt active sites promote NO-NO2 oxidation, followed by the non-catalytic reaction of NO2 with the trapped soot.

引用

页码：299 / 303

页数：5

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