Lean-DeNOx titania based monolithic catalysts

被引：12

作者：

Blanco, J

Odenbrand, CUI

Avila, P

Knapp, C

机构：

[1] CSIC, Inst Catalisis & Petr Quim, E-28049 Madrid, Spain

[2] Lund Inst Technol, Dept Chem Engn 2, S-22100 Lund, Sweden

来源：

CATALYSIS TODAY | 1998年 / 45卷 / 1-4期

关键词：

NOx reduction; monolith; hydrocarbon; diesel; platinum; copper oxide;

D O I：

10.1016/S0920-5861(98)00255-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The activity of titania based copper and platinum monolithic catalysts in the reduction of nitrogen oxides was studied with exhaust gases from a Diesel engine injecting fuel as reductant. Combining both catalysts, a two-stage system was designed, studying the influence of the copper catalysts composition on its performance with synthetic gas mixtures. The influence of reactants concentration and operating conditions was also investigated. Taking into account these results, a double-bed system with a cell density of 33 cell cm(-2) (210 c.p.s.i.) was prepared. Linear velocity had a strong influence on the performance of the Pt catalyst and of the double-bed. Two NOx conversion maxima were observed with Pt/TiO2 at 225 degrees C and 350 degrees C operating at 6.6 m s(-1). Promising NOx conversions were achieved in the temperature range 200-450 degrees C. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：103 / 108

页数：6

共 31 条

[1]

Avila P, 1998, STUD SURF SCI CATAL, V116, P233

[2] NO REDUCTION BY HYDROCARBONS IN AN OXIDIZING ATMOSPHERE OVER TRANSITION METAL-ZIRCONIUM MIXED OXIDES [J].