Mn-Ce/beta "bifunctional" catalyst for the selective catalytic reduction of nitrogen oxides with ammonia

被引：15
|
作者：
Krivoruchenko, D. S. [1 ]
Telegina, N. S. [1 ]
Bokarev, D. A. [1 ]
Stakheev, A. Yu. [1 ]
机构：
[1] Russian Acad Sci, Zelinsky Inst Organ Chem, Moscow 119991, Russia
来源：
KINETICS AND CATALYSIS | 2015年 / 56卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
bimetallic catalysts; Mn; Ce; SCR; zeolite catalyst; LOW-TEMPERATURE SCR; NO REDUCTION; COMPLETE OXIDATION; SUPERIOR CATALYST; MANGANESE OXIDES; MNOX-CEO2; NH3; COMBUSTION; MECHANISM; KINETICS;
D O I：
10.1134/S0023158415060051
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 properties of the Mn-Ce/Beta zeolite catalyst in the selective catalytic reduction (SCR) of NOx have been investigated. The introduction of Ce leads to a marked increase in the NO (x) conversion at 100-250 degrees C. The data of this study are consistent with the "bifunctional" pathway of SCR suggested for Mn/Beta, which consists of two stages-NO oxidation to NO2 over the oxide component and "fast" SCR over the zeolite. The increased activity of Mn-Ce/Beta at the NO-to-NO2 oxidation stage is due to the formation of MnCeO (x) mixed oxides enhancing the mobility of lattice oxygen. The determining role is played by the activity of the zeolite component in the "fast" SCR reaction.
引用
收藏
页码：741 / 746
页数：6
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