Low temperature NH3-SCR of NO over an unexpected Mn-based catalyst: Promotional effect of Mg doping

被引：58
作者：
Fang, De [1 ,2 ]
He, Feng [1 ,3 ]
Liu, Xiaoqing [2 ]
Qi, Kai [3 ]
Xie, Junlin [1 ,2 ,3 ]
Li, Fengxiang [3 ]
Yu, Chongqinq [4 ]
机构：
[1] Wuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R China
[2] Wuhan Univ Technol, Ctr Mat Res & Anal, Wuhan 430070, Hubei, Peoples R China
[3] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Hubei, Peoples R China
[4] Med Device Supervising & Testing Ctr Hangzhou, Hangzhou 310009, Zhejiang, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2018年 / 427卷
关键词：
Mg doping; MnOx/TiO2; Low temperature; NH3-SCR; Reaction route; SUPPORTED MANGANESE OXIDE; IN-SITU DRIFTS; MN/TIO2; CATALYST; SELECTIVE REDUCTION; MNOX/TIO2; CATALYSTS; TRANSITION-METALS; CE/TIO2; NH3; MECHANISM; SCR;
D O I：
10.1016/j.apsusc.2017.08.088
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：
MnOx/TiO2 catalysts doped with Mg have been prepared with the impregnation method. Surprisingly, 7% Mg-MnOx/TiO2 catalyst containing more Mn3+ ions showed superior low-temperature SCR activity and stability. Mg doping resulted in some adverse effects on the phases, BET surface areas, reducibility, NH3 adsorption, and morphology structures. However, according to the SCR performance, these effects were thought to be rather limited in comparison with the catalytic properties of MgMn2O4 which might stem from the enhancement of NH3-SCR activity and stability. Meanwhile, based on the in situ DRIFTS tests, the NH3-SCR reaction route of MnOx/TiO2 and Mg doped MnOx/TiO2 catalysts depended on the kind of gas (NH3 or NO) pre-adsorbed on the catalyst. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：45 / 55
页数：11
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