Effect of WO3 content on the catalytic activity of CeO2-ZrO2-WO3 for selective catalytic reduction of NO with NH3

被引：1

作者：

Song, Zhong-Xian ^{[1
]}

Zhang, Qiu-Lin ^{[1
]}

Zhang, Jin-Hui ^{[1
]}

Ning, Ping ^{[1
]}

Li, Hao ^{[1
]}

Wang, Yan-Cai ^{[1
]}

Wang, Ming-Zhi ^{[1
]}

Duan, Yan-Kang ^{[1
]}

机构：

[1] Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2015年 / 43卷 / 06期

关键词：

Acidity; Redox property; Selective catalytic reduction; WO[!sub]3[!/sub;

D O I：

10.1016/s1872-5813(15)30021-9

中图分类号：

学科分类号：

摘要：

A series of CeO2-ZrO2-WO3 catalysts (CZW) was prepared by the hydrothermal method. The effect of WO3 content on their catalytic properties for selective reduction of NOx with NH3 was investigated. The catalysts were characterized by X-ray diffraction, N2 sorption, H2 temperature-programmed reduction, NH3 temperature-programmed desorption and NO temperature-programmed desorption techniques. It was shown that WO3 existed as amorphous species in the CZW. Introduction of WO3 in the CZW dramatically enhanced its surface acidity and gave rise to strongly adsorbed NO species, consequently increasing the catalytic activity. In addition, appropriate amounts of WO3 also increased the surface area and improved the reduction behavior of the catalyst. Compared to the CeO2-ZrO2, the CZW with 20% WO3 not only exhibited high resistivity to SO2, but also had a wider reaction temperature window. It showed a NOx conversion of > 90% at the space velocity of 60000 h-1 in the temperature range of 200~463 ℃. ©, 2015, Science Press. All right reserved.

引用

页码：701 / 707

页数：6

共 27 条

[1] Li X.L., Li Y.H., Deng S.S., Rong T.A., A Ce-Sn-Ox catalyst for the selective catalytic reduction of NOx with NH3, Catal Commun, 40, pp. 47-50, (2013)
[2] Wang Y.-C., Liu X., Ning P., Zhang Q.-L., Zhang J.-H., Xu L.-S., Tang X.-S., Wang M.-Z., Effect of preparation methods on selective catalytic reduction of NOx with NH3 over manganese oxide octahedral molecular sieves, J Fuel Chem Technol, 42, 11, pp. 1357-1364, (2014)
[3] Kong Z.-J., Wang C., Ding Z.-N., Chen Y.-F., Zhang Z.-K., Li-modified MnO2 catalyst and LiMn2O4 for selective catalytic reduction of NO with NH3, J Fuel Chem Technol, 42, 12, pp. 1447-1454, (2014)
[4] Shen B.-X., Ma J., Alkali-resistant performance of V2O5-WO3/TiO2 catalyst modified by SiO2, J Fuel Chem Technol, 40, 2, pp. 247-251, (2012)
[5] Shen Y.S., Zhu S.M., Qiu T., Shen S.B., A novel catalyst of CeO2/Al2O3 for selective catalytic reduction of NO by NH3, Catal Commun, 11, 1, pp. 20-23, (2009)
[6] Chen L., Li J.H., Ge M.F., DRIFT study on cerium-tungsten/titiania catalyst for selective catalytic reduction of NOx with NH3, Environ Sci Technol, 44, 24, pp. 9590-9596, (2010)
[7] Shen B.-X., Yao Y., Ma H.-Q., Liu T., Ceria modified MnOx/TiO2-pillared clays catalysts for the selective catalytic reduction of NO with NH3 at low temperature, Chin J Catal, 32, 12, pp. 1803-1811, (2011)
[8] Shan W.P., Liu F.D., He H., Shi X.Y., Zhang C.B., An environmentally-benign CeO2-TiO2 catalyst for the selective catalytic reduction of NOx with NH3 in simulated diesel exhaust, Catal Today, 184, 1, pp. 160-165, (2012)
[9] Peng Y., Liu Z.M., Niu X.W., Zhou L., Fu C.W., Zhang H., Li J.H., Ha W., Manganese doped CeO2-WO3 catalysts for the selective catalytic reduction of NOx with NH3: An experimental and theoretical study, Catal Commun, 19, pp. 127-131, (2012)
[10] Zhou R.X., Zhao B., Yue B.H., Effects of CeO2-ZrO2 present in Pd/Al2O3 catalysts on the redox behavior of PdOx and their combustion activity, Appl Surf Sci, 254, 15, pp. 4701-4707, (2008)

← 1 2 3 →