An in situ infrared study of NO reduction by C3H8 over Fe-ZSM-5

被引：108

作者：

Lobree, LJ ^{[1
]}

Hwang, IC

Reimer, JA

Bell, AT

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA

来源：

CATALYSIS LETTERS | 1999年 / 63卷 / 3-4期

关键词：

selective catalytic reduction; SCR; Fe-ZSM-5; zeolites; NOx reduction with propane;

D O I：

10.1023/A:1019033508479

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 interactions of NO, O-2 and NO2 with Fe-ZSM-5, as well as the reduction of NO by C3H8 in the presence of O-2, have been investigated using in situ infrared spectroscopy. The sample of Fe-ZSM-5 (Fe/Al = 0.56) was prepared by solid-state ion exchange. NO adsorption in the absence of O-2 produces only mono- and dinitrosyl species associated with Fe2+ cations. Adsorbed NO2/NO3 species are formed via the reaction of adsorbed O-2 with gas-phase NO or by the adsorption of gas-phase NO2. The reduction of NO in the presence of O-2 begins with the reaction of gas-phase C3H8 with adsorbed NO2/NO3 species to form a nitrogen-containing polymeric species. A reaction pathway is proposed for the catalyzed reduction of NO by C3H8 in the presence of O-2.

引用

页码：233 / 240

页数：8

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