Oxidation of carbon black over various Pt/MOx/SiC catalysts

被引：70
|
作者：
Oi-Uchisawa, J [1 ]
Obuchi, A [1 ]
Enomoto, R [1 ]
Xu, JY [1 ]
Nanba, T [1 ]
Liu, ST [1 ]
Kushiyama, S [1 ]
机构：
[1] Natl Inst Resources & Environm, Atmospher Environm Protect Dept, Tsukuba, Ibaraki 3058569, Japan
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2001年 / 32卷 / 04期
关键词：
Pt catalyst; SiC; carbon black; soot; diesel exhaust; TiO2; diesel particulate filter;
D O I：
10.1016/S0926-3373(01)00150-3
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：
Catalytic activities of various Pt/MOx/SiC systems for carbon oxidation under simulated diesel exhaust gas were investigated in temperature-programmed reactions. When Pt/MOx (MOx = TiO2, ZrO2, Al2O3) was loaded onto silicon carbide (SiC), the oxidation activities became higher than those of Pt/MOx alone or other Pt/MOx/SiC systems (MOx = Ta2O5, WO3, Nb2O5, SnO2, SiO2, CeO2, MoO3, V2O5). Among them, Pt/TiO2/SiC exhibited the highest activity. We discuss the activity of MOx = TiO2, ZrO2, and Al2O3 in connection with NO oxidation activity, adsorption of sulfate onto the support, Pt dispersion, and specific surface area of the catalyst. Furthermore, we investigated the catalytic performance of Pt/TiO2/SiC in more detail under isothermal conditions and in a staged arrangement. (C) 2001 Elsevier Science B.V All rights reserved.
引用
收藏
页码：257 / 268
页数：12
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