Enhancement of Low-Temperature Catalytic Activity over a Highly Dispersed Fe-Mn/Ti Catalyst for Selective Catalytic Reduction of NOx with NH3

被引：80

作者：

Mu, Jincheng ^{[1
]}

Li, Xinyong ^{[1
]}

Sun, Wenbo ^{[1
]}

Fan, Shiying ^{[1
]}

Wang, Xinyang ^{[1
]}

Wang, Liang ^{[1
]}

Qin, Meichun ^{[1
]}

Gan, Guoqiang ^{[1
]}

Yin, Zhifan ^{[1
]}

Zhang, Dongke ^{[2
]}

机构：

[1] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, State Key Lab Fine Chem, Dalian 116024, Peoples R China

[2] Univ Western Australia, Ctr Energy M473, 35 Stirling Highway, Crawley, WA 6009, Australia

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2018年 / 57卷 / 31期

基金：

中国国家自然科学基金;

关键词：

MANGANESE OXIDE CATALYSTS; IRON TITANATE CATALYST; IN-SITU FTIR; SCR CATALYST; ANATASE TIO2; MIXED OXIDES; PERFORMANCE; MN; CE; NH3-SCR;

D O I：

10.1021/acs.iecr.8b01335

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A novel Fe2O3-MnO2/TiO2 catalyst was synthesized using a conventional impregnation method assisted with ethylene glycol and used for NH3-SCR. The catalyst exhibited superior low-temperature activity over a broad temperature window (100-325 degrees C), low apparent activation energy, and excellent sulfur-poisoning resistance. The characterization results revealed that the catalyst was greatly dispersed with smaller particles, and the partial doping of Fe into the TiO2 lattice thereby led to the formation of the Fe-O-Ti structure, which could strengthen the electronic inductive effect and increase the ratio of surface chemisorption oxygen, resulting in the enhancement of NO oxidation and favoring the low-temperature SCR activity via a "fast SCR" process. The in situ FTIR analysis showed that the NOx adsorption capacity was significantly improved due to the desired dispersion property, further helping both the SCR activity and reaction rate at low temperatures. The present work confirmed that more active sites can be provided on the catalyst surface by modifying the dispersity.

引用

页码：10159 / 10169

页数：11

共 62 条

[1] Impact of nitrogen oxides on the environment and human health: Mn-based materials for the NOx abatement [J].