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
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
收藏
页码:L213 / L216
页数:4
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