Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (09): 2449-2454.doi: 10.3866/PKU.WHXB20100838

• CATALYSIS AND SURFACE STRUCTURE • Previous Articles     Next Articles

Influence of Tungsten Oxide on Selective Catalytic Reduction of NOx with NH3 over MnOx -CeO2 /ZrO2-TiO2Monolith Catalyst

XU Hai-Di, QIU Chun-Tian, ZHANG Qiu-Lin, LIN Tao, GONG Mao-Chu, CHEN Yao-Qiang   

  1. Key Laboratory of Green Chemistry &Technology of the Ministry of Education, Sichuan University,Chengdu 610064, P. R. China
  • Received:2010-02-02 Revised:2010-03-23 Published:2010-09-02
  • Contact: LIN Tao E-mail:nic7501@scu.edu.cn
  • Supported by:

    The project was supported by the Key Programof the National Natural Science Foundation of China (20333030) and National Natural Science Foundation of China (20273043).

Abstract:

MnOx-CeO2/WO3/ZrO2-TiO2monolithic catalyst was prepared by ZrO2-TiO2 as support, MnOx-CeO2 as active components and WO3 as the promoter. The influence of the different mass fractions (w) of WO3 on the NH3-selective catalytic reduction (NH3-SCR) of NOx performance at low temperature was studied. The catalysts were characterized by N2 adsorption-desorption at low temperature, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and NH3 temperature-programmed desorption (NH3-TPD). The experimental results showed that, compared with the catalyst without WO3, the catalyst with 10.0% (w)WO3 had good texture properties, middle strong acid sites, and higher Oxidation performance. The results of activity test showed that the monolith catalyst had not only good catalytic activity at low temperature but also a wide activity temperature window. The NOx conversion is more than 90%in the temperature range of 144-374oC at the space velocity of 10000 h-1. It shows potential application in de-NOx at low-temperature.

Key words: Low temperature, Selective catalytic reduction, Tungsten trioxide, Nitrogen oxide, Monolithic catalysts

MSC2000: 

  • O643