Catalytic combustion of diesel soot over metal oxide catalysts

被引：103

作者：

Neri, G ^{[1
]}

Bonaccorsi, L ^{[1
]}

Donato, A ^{[1
]}

Milone, C ^{[1
]}

Musolino, MG ^{[1
]}

Visco, AM ^{[1
]}

机构：

[1] UNIV MESSINA,DIPARTIMENTO CHIM IND,I-98166 SANT AGATA MESSIN,ITALY

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1997年 / 11卷 / 02期

关键词：

diesel soot; catalytic combustion; metal oxide;

D O I：

10.1016/S0926-3373(96)00045-8

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：

The activity of different metal oxides in the catalytic combustion of a diesel soot having a high amount of adsorbed hydrocarbons has been investigated and tested in a TPO apparatus. Two different steps have been observed. The first is related to the combustion of hydrocarbons adsorbed on soot and the second one to the combustion of the graphitic solid fraction. A high surface area Fe2O3 was found to be the most active catalyst for the oxidation of hydrocarbons, whereas V2O5 was also able to promote the combustion of graphitic carbon. The oxidation of the hydrocarbon fraction has been correlated with the surface area and the strength of the metal-oxygen bond of the metal oxide. The combustion of graphitic carbon is favoured instead on metal oxides having a low melting point. The effect of platinum addition to gamma-alumina has been also investigated. Spillover of activated oxygen from Pt to the support has been postulated to take into account the promotion of the oxidation of graphitic carbon.

引用

页码：217 / 231

页数：15

共 27 条

[1]

ABDERRAHIM H, 1908, STUD SURF SCI CATAL, V30, P359

[2] COMBUSTION OF SOOT DEPOSITS FROM DIESEL-ENGINES ON MIXED OXIDES OF VANADIUM PENTOXIDE AND CUPRIC OXIDE [J].