The effect of layering of functionally different catalysts for the selective reduction of NOx with hydrocarbons

被引：18

作者：

Obuchi, A ^{[1
]}

Kaneko, I ^{[1
]}

Uchisawa, J ^{[1
]}

Ohi, A ^{[1
]}

Ogata, A ^{[1
]}

Bamwenda, GR ^{[1
]}

Kushiyama, S ^{[1
]}

机构：

[1] Natl Inst Resources & Environm, Tsukuba, Ibaraki 3058569, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1998年 / 19卷 / 02期

关键词：

NOx; selective reduction; Pt; zeolites; alumina; combination; honeycomb; diesel;

D O I：

10.1016/S0926-3373(98)00064-2

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 performance of double-layered catalysts composed of a layer of Pt/SiO2 and a layer of H-ZSM-5 or Al2O3 wash-coated over the Pt/SiO2 layer for the selective reduction of NOx with hydrocarbons, was examined. Under synthetic gas conditions, the double-layered catalysts showed higher activity than did Pt/SiO2 without the secondary layer, the performance of H-ZSM-5 as an upper layer being better than that of Al2O3. Under practical, diesel exhaust-gas conditions, the combination of Pt/SiO2 with H-ZSM-5 was superior to a single layer of Pt-ZSM-5. The reaction scheme for the double-layered catalysts and factors affecting performance are discussed. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：127 / 135

页数：9

共 39 条

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