Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (07): 1127-1131.doi: 10.1016/S1872-1508(08)60046-7

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Monolith Manganese-Based Catalyst Supported on ZrO2-TiO2 for NH3-SCR Reaction at Low Temperature

LIN Tao; ZHANG Qiu-Lin; LI Wei; GONG Mao-Chu; XING Yi-Xun; CHEN Yao-Qiang   

  1. Key Laboratory of Green Chemistry &Technology of the Ministry of Education, Sichuan University, Chengdu 610064, P. R. China
  • Received:2008-02-18 Revised:2008-04-23 Published:2008-07-04
  • Contact: CHEN Yao-Qiang E-mail:nic7501@email.scu.edu.cn

Abstract:

Monolith catalysts were prepared using TiO2 and ZrO2-TiO2 as supports with MnO2 as active component and Fe2O3 as promoter. The catalytic activities at low temperature and stability at high temperature for selective catalytic reduction of NOx with NH3 (NH3-SCR) in the presence of excessive O2were studied after the catalysts calcined at different temperatures. The catalystswere characterized by X-ray diffraction (XRD), specific surface area measurements (BET), oxygen storage capacity (OSC), and temperature programmed reduction (H2-TPR). The results indicated that the catalyst supported on ZrO2-TiO2 had excellent stability at high temperature, and possessed high specific surface area and oxygen storage capacity, and had strong redox property. The results of the catalytic activities indicated that the monolith manganese-based catalyst using ZrO2-TiO2 as support had evidently improved the activity of NH3-SCR reaction at low temperature, and it showed great potential for practical application.

Key words: ZrO2-TiO2, Low-temperature NH3-SCR, NO, NH3, Monolith catalyst

MSC2000: 

  • O643