Role of CeO2-ZrO2 in diesel soot oxidation and thermal stability of potassium catalyst

被引：67

作者：

Wu, Xiaodong ^{[1
]}

Liu, Dongxu ^{[1
]}

Li, Kai ^{[1
]}

Li, Jia ^{[1
]}

Weng, Duan ^{[1
]}

机构：

[1] Tsing Hua Univ, Adv Mat Lab, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 08期

基金：

中国国家自然科学基金;

关键词：

CeO2-ZrO2 mixed oxides; soot; catalytic combustion; ageing treatment;

D O I：

10.1016/j.catcom.2006.11.022

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：

Potassium nitrate catalysts supported on different oxides (CeO2, Ce0.5Zr0.5O2 and ZrO2) were prepared for diesel soot combustion. The ageing treatment was performed at 800 degrees C for 24 h and the catalytic activity was evaluated by a temperature-programmed oxidation technique. The results demonstrated that, compared with CeO2 and ZrO2, Ce0.5Zr0.5O2 presented good redox properties, a high surface area and available potassium-holding capacity at an elevated temperature. For aged K/Ce0.5Zr0.5O2, the combustion temperature of soot particle was 359 degrees C under tight contact conditions and 455 degrees C under loose contact conditions. Thus, ceria-zirconia mixed oxides were considered as good candidate supports for diesel soot oxidation catalysis. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：1274 / 1278

页数：5

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