Remarkable enhancement in durability of Pd/H-ZSM-5 zeolite catalysts for CH4-SCR

被引：32

作者：

Ogura, M ^{[1
]}

Kage, S ^{[1
]}

Hayashi, M ^{[1
]}

Matsukata, M ^{[1
]}

Kikuchi, E ^{[1
]}

机构：

[1] Waseda Univ, Dept Appl Chem, Shinjuku Ku, Tokyo 1698555, Japan

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2000年 / 27卷 / 04期

关键词：

CH4-SCR; Pd/H-ZSM-5; durability; Co/Pd/H-ZSM-5;

D O I：

10.1016/S0926-3373(00)00136-3

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：

Effect of second components on the catalytic performance of Pd/H-ZSM-5 zeolite (Pd: 0.4 wt.%) was evaluated by a durability test of NO reduction with CH4 at a relatively high temperature of 500 degrees C in the presence of water vapor for a prolonged period. The Pd/H-ZSM-5 showed high stable activity for this reaction without H2O in the reactant feed, while immediate and irreversible deactivation was observed in the presence of H2O, resulting in no activity after 7 h. The second components such as Co, Rh, Ag, Ce, and Fe introduced individually to the Pd/H-ZSM-5 enhanced the durability, and in particular the addition of 3.3 wt.% Co led to a stable NO conversion for more than 40 h in the presence of H2O. (C) 2000 Published by Elsevier Science B.V.

引用

页码：L213 / L216

页数：4

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