Structure, acidity and activity of CuOx/WOx-ZrO2 catalyst for selective catalytic reduction of NO by NH3

被引：146

作者：

Si, Zhichun ^{[1
]}

Weng, Duan ^{[1
]}

Wu, Xiaodong ^{[1
]}

Li, Jia ^{[1
]}

Li, Guo ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2010年 / 271卷 / 01期

关键词：

NH3-SCR; CuOx/WOx-ZrO2; Low-temperature; Reaction route; LOW-TEMPERATURE; NITRIC-OXIDE; MECHANISTIC ASPECTS; SCR CATALYSTS; EXCESS O-2; AMMONIA; ZIRCONIA; COPPER; UREA; CHEMISTRY;

D O I：

10.1016/j.jcat.2010.01.025

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：

A series of CuOx/WOx-ZrO2 catalysts were synthesized by impregnating different amounts of copper on the coprecipitated WOx-ZrO2 support and were characterized by XRD, BET, XPS, NH3/NO chemisorption, NH3-TPO and NH3-SCR activity measurements. A wide temperature range (200-320 degrees C) in which NO conversion exceeds 80% is achieved on the 10 wt.% CuOx/WOx-ZrO2 catalyst. The activity and selectivity of the catalysts for ammonia oxidation and NH3-SCR reaction are determined by the strength and amount of Lewis acid sites and Bronsted acid sites, which are adjusted by the formation of WOx-ZrO2 solid solutions and the addition of copper oxides. Two different reaction routes, "ammonia-NO2 route" at low temperatures (<200 degrees C) and "amine-NO/NO2" at high temperatures (>250 degrees C), are presented for SCR reaction over CuOx/WOx-ZrO2 catalysts. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：43 / 51

页数：9

共 50 条

[1] Tailored temperature window of CuOx/WOx-ZrO2 for NOx reduction via adjusting the calcination temperature of WOx-ZrO2
Si, Zhichun
Wu, Xiaodong
Weng, Duan
Ma, Ziran
Ma, Jing
MATERIALS CHEMISTRY AND PHYSICS, 2013, 138 (01) : 399 - 404
[2] Influence of WOx on the performance of a CrOx-WOx catalyst for the selective catalytic reduction of NOx with NH3
Feng, Jingyi
Wang, Qingshan
Wu, Tong
Gao, Shujie
Zhu, Kai
Ye, Dong
Guo, Ruitang
FUEL, 2024, 363
[3] CuOx and WOx modified CeO2-TiO2 with various morphologies for the selective catalytic reduction of NOx with NH3
Li, Yue
Gao, Wenxiang
Deng, Jie
Xu, Haidi
Chen, Yongdong
APPLIED SURFACE SCIENCE, 2023, 641
[4] Low-temperature Selective Catalytic Reduction of NO with NH3 over CuOx/CNTs Catalyst
Ren, B. N.
1ST INTERNATIONAL WORKSHOP ON MATERIALS SCIENCE AND MECHANICAL ENGINEERING, 2017, 281
[5] Synergistic effects between copper and tungsten on the structural and acidic properties of CuOx/WOx-ZrO2 catalyst
Si, Zhichun
Weng, Duan
Wu, Xiaodong
Jiang, Yang
Wang, Bin
CATALYSIS SCIENCE & TECHNOLOGY, 2011, 1 (03) : 453 - 461
[6] A novel Cr/WO3-ZrO2 catalyst for the selective catalytic reduction of NOx with NH3
Ma, Lingling
Su, Hang
Wang, Zhihua
Zhang, Cuihua
Liu, Zhiming
CATALYSIS COMMUNICATIONS, 2019, 125 : 77 - 81
[7] Selective catalytic reduction of NO with NH3 over CuOX-carbonaceous materials
Li, Qian
Yang, Hangsheng
Ma, Zhaoxia
Zhang, Xiaobin
CATALYSIS COMMUNICATIONS, 2012, 17 : 8 - 12
[8] A CeO2/ZrO2-TiO2 Catalyst for the Selective Catalytic Reduction of NOx with NH3
Shan, Wenpo
Geng, Yang
Zhang, Yan
Lian, Zhihua
He, Hong
CATALYSTS, 2018, 8 (12):
[9] Investigation of the surface acidity and redox on the CeO2-WO3 catalyst for selective catalytic reduction with NH3
Kang H.-Y.
Mo D.-J.
Zhang X.-J.
Zhang M.-R.
Gao H.-R.
Mao Y.-L.
Li H.-Y.
Song Z.-X.
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology, 2023, 51 (06): : 812 - 822
[10] Effect of manganese substitution on the structure and activity of iron titanate catalyst for the selective catalytic reduction of NO with NH3
Liu, Fudong
He, Hong
Ding, Yun
Zhang, Changbin
APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 93 (1-2) : 194 - 204

← 1 2 3 4 5 →