Synergistic effect in lean NOx reduction by CH4 over Co/Al2O3 and H-zeolite catalysts

被引:95
作者
Yan, JY [1 ]
Kung, HH [1 ]
Sachtler, WMH [1 ]
Kung, MC [1 ]
机构
[1] Northwestern Univ, Ctr Catalysis & Surface Sci, VN Ipatieff Lab, Evanston, IL 60208 USA
关键词
D O I
10.1006/jcat.1998.2012
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
In the reduction of NO by CH4 in the presence of a large excess of oxygen, the conversion to N-2 over a physical mixture of Co/Al2O3 and H-zeolite catalysts was found to be twice as high as that expected if these components acted independently. This synergistic effect was observed with both H-ZSM-5 and H-USY. By comparing the activities of these catalysts for NO oxidation and CH4 reduction of NO2, it was concluded that the synergistic effect could be explained by the participation of Co ions and proton sites in the reaction. NO is oxidized to NO2 over the Co ions, and NO2 is reduced by CH4 to N-2 over the proton sites. (C) 1998 Academic Press.
引用
收藏
页码:294 / 301
页数:8
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