Low-temperature SCR of NO with NH3 over noble metal promoted Fe-ZSM-5 catalysts

被引：21

作者：

Qi, GS ^{[1
]}

Yang, RT ^{[1
]}

机构：

[1] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

来源：

CATALYSIS LETTERS | 2005年 / 100卷 / 3-4期

关键词：

low-temperature SCR; Fe-ZSM-5; noble metal promoted Fe-ZSM-5; SCR; ammonia-SCR;

D O I：

10.1007/s10562-004-3462-5

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：

We have reported previously the excellent performance of Fe-exchanged ZSM-5 for selective catalytic reduction (SCR) of NO with ammonia at high temperatures ( 300 - 400 degrees C). In this work, we found that the reaction temperature could be decreased to 200 300 degrees C when a small amount of noble metal (Pt, Rh, or Pd) was added to the Fe-ZSM-5. The SCR activity follows the order Pt/Fe-ZSM-5 > Rh/Fe-ZSM- 5 > Pd/Fe-ZSM-5 at 250 degrees C. On the Pt promoted Fe-ZSM-5, 90% NO conversion was obtained at 250 degrees C at GHSV = 1.1 x 10(5) h(-1). Moreover, the noble metal improved the resistance to H2O and SO2. The presence of H2O and SO2 decreased the SCR performance only very slightly.

引用

页码：243 / 246

页数：4

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