Effect of rhodium on the properties of bifunctional MxOy/ZrO2 catalysts in the reduction of nitrogen oxides by hydrocarbons

被引：13
|
作者：
Mironyuk, Tatyana V. [1 ]
Orlyk, Svetlana N. [1 ]
机构：
[1] Natl Acad Sci Ukraine, LV Pisarzhevsky Phys Chem Inst, UA-03028 Kiev, Ukraine
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2007年 / 70卷 / 1-4期
关键词：
nitrogen oxides; reduction; hydrocarbons; zirconia; transition metal oxides; rhodium; acidity; bifunctionality;
D O I：
10.1016/j.apcatb.2005.11.024
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 catalytic proper-ties of transition metal oxides (Cr, Ce, and Co) supported on ZrO2 synthesized by various methods, as well as the effect of rhodium on the performance of the MxOy/ZrO2 Oxide systems in NO reduction with hydrocarbons (methane, propane-butane mixture, and propene) were studied. Scanning electron microscopy, ammonia thermoprogrammed desorption (NH3-TPD), XPS, and IR spectroscopy were used to study the physicochemical indices of rhodium-promoted MxOy/ZrO2 oxide catalysts. The enhancement of the redox properties of the oxide catalysts upon the introduction of rhodium does not alter their bifunctional nature in SCR activity: these catalysts have both redox and strong acid Bronsted-sites. (c) 2006 Elsevier B.V. All rights reserved.
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页码：58 / 64
页数：7
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