Lean NOx catalysis over alumina-supported catalysts

被引：53

作者：

Kung, MC ^{[1
]}

Kung, HH ^{[1
]}

机构：

[1] Northwestern Univ, Dept Chem Engn, Evanston, IL 60208 USA

来源：

TOPICS IN CATALYSIS | 2000年 / 10卷 / 1-2期

关键词：

NOx reduction; gamma-alumina; lean NOx; hydrocarbon SCR; SnO2; cobalt oxide; silver;

D O I：

10.1023/A:1019147630269

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

gamma-alumina-supported catalysts show promise as lean NOx catalysts. The role of alumina in influencing the structural and chemical properties of the active phase supported on it is discussed using some effective alumina-based lean NOx catalysts. These include Ag/gamma-Al2O3, CoOx/gamma-Al2O3 and SnO2/gamma-Al2O3. Alumina plays an important role in stabilizing Ag in the oxidic phase and cobalt in the 2+ oxidation state. For SnO2/gamma-Al2O3, alumina increases the SnO2 surface area. On both Ag/gamma-Al2O3 and SnO2/gamma-Al2O3, alumina also participates actively in the NOx reduction reaction. An active organic intermediate is formed on Ag or Sn oxide which reacts with NOx subsequently on alumina to form N-2.

引用

页码：21 / 26

页数：6

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