Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (11): 2240.

• Articles • Previous Articles     Next Articles

Preparation of Mn-Fe/ZrO2-TiO2 Monolith Catalyst and Its Properties for Low-Temperature NH3-SCR Reaction

LIN Tao, XU Hai-Di, LI Wei, ZHANG Qiu-Lin, GONG Mao-Chu, CHEN Yao-Qiang*   

  1. Key Laboratory of Green Chemistry & Technology, Ministry of Education, Sichuan University, Chengdu 610064, China
  • Received:2009-01-05 Online:2009-11-10 Published:2009-11-10
  • Contact: CHEN Yao-Qiang. E-mail: nic7501@scu.edu.cn
  • Supported by:

    国家自然科学重点基金(批准号: 20333030)和国家自然科学基金(批准号: 20273043)资助.

Abstract:

The catalytic properties of the monolith ZrO2-TiO2 supported Mn-based catalysts were studied for NH3-SCR reaction at low temperature. The catalysts were characterized by specific surface area measurements(BET), X-ray diffraction(XRD), oxygen storage capacity(OSC) , temperature programmed reduction(TPR) and X-ray photoelectron spectroscopy(XPS). The results indicate that, compared to the catalysts supported on TiO2 ,the catalysts supported on ZrO2-TiO2 have higher surface area, more steady structure, more OSC, stronger redox properties as well as higher concentration of surface Mn and have good activity at low temperature and excellent stability at high temperature. After Mn-Fe/ZrO2-TiO2 is calcined at 700 ℃, the light-off tempe-rature of the catalyst is 182 ℃ and NO conversion is 78% at a high space velocity of 55000 h-1, and the catalyst is water-resistant. It shows great potential for practical application.

Key words: Low-temperature NH3-SCR reaction; ZrO2-TiO2; NOx; Monolith catalyst

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