Reduction of nitrogen oxides with hydrocarbons catalyzed by bifunctional catalysts

被引:88
作者
Misono, M
Hirao, Y
Yokoyama, C
机构
[1] Department of Applied Chemistry, Graduate School of Engineering, University of Tokyo, Tokyo 113, Bunkyo-ku
关键词
nitrogen oxide; reduction of NOx; bifunctional catalysis; Mn2O3; Sn-zeolite;
D O I
10.1016/S0920-5861(97)00060-6
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Usefulness of the concept of bi- or multifunctional catalysis in the catalyst design for the reduction of dilute nitrogen oxides by hydrocarbons in the presence of excess oxygen (so-called HC-SCR) is demonstrated. First, it is shown that the complex reaction of HC-SCR can be divided into (i) the oxidation of NO to NO2 and (ii) the subsequent reactions between NO2 and hydrocarbons. Further, two examples, where significant improvement of catalytic performance was obtained, based on the idea of bifunctional catalysis are presented: (a) NO-C3H6-O-2 catalyzed by mechanical mixtures of Mn2O3 and M-ZSM-5 (metal loaded ZSM-5), and (b) NO-CH4-O-2 by Pd/H-ZSM-5 (Pd loaded H-ZSM-5).
引用
收藏
页码:157 / 162
页数:6
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