Low-temperature selective catalytic reduction of NO with NH3 over monolith catalyst of MnOx/CeO2-ZrO2-Al2O3

被引：122

作者：

Zhang, Qiulin ^{[1
]}

Qiu, Chuntian ^{[1
]}

Xu, Haidi ^{[1
]}

Lin, Tao ^{[1
]}

Lin, Zhien ^{[1
]}

Gong, Maochu ^{[1
]}

Chen, Yaoqiang ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem, Key Lab Green Chem & Technol, Minist Educ, Chengdu 610064, Peoples R China

来源：

CATALYSIS TODAY | 2011年 / 175卷 / 01期

基金：

中国国家自然科学基金;

关键词：

SCR; Low temperature; NO; Monolith catalyst; Manganese; MANGANESE OXIDE CATALYSTS; OXYGEN STORAGE CAPACITY; MIXED OXIDES; NITRIC-OXIDE; OXIDATION; SCR; AMMONIA; AL2O3; TIO2; PERFORMANCE;

D O I：

10.1016/j.cattod.2011.05.009

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

MnOx/CeO2-ZrO2-Al2O3 (MnOx/CZA) catalysts with different amounts of manganese loading were prepared by incipient wetness impregnation method for selective catalytic reduction (SCR) of NO with NH3 at low temperature. The catalysts were characterized by N-2 adsorption-desorption measurement, XRD, XPS, and H-2-TPR. Catalytic activity tests reveal that the MnOx/CZA catalyst with 10% manganese loading has the best catalytic activity, almost 90% NO is translated to N-2 in the temperature range of 143-300 degrees C. The highly dispersed MnOx species, the good oxidation activity of NO to NO2, the existent synergistic effect between the manganese and cerium oxides, and the various oxidation states of manganese oxides may be the main reasons for the best SCR activity. In addition, the SCR activity is slightly influenced in the presence of SO2 and H2O, while such effect is restorable after heating treatment. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：171 / 176

页数：6

共 36 条

[1] Honeycomb reactor washcoated with mordenite type zeolite catalysts for the reduction of NOx by NH3 [J].