Citation: XU Hai-Di, QIU Chun-Tian, ZHANG Qiu-Lin, LIN Tao, NG Mao-Chu, CHEN Yao-Qiang. Influence of Tungsten Oxide on Selective Catalytic Reduction of NO_x with NH₃ over MnO_x -CeO₂ /ZrO₂-TiO₂Monolith Catalyst[J]. Acta Physico-Chimica Sinica, ;2010, 26(09): 2449-2454. doi: 10.3866/PKU.WHXB20100838 shu

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

1.
Key Laboratory of Green Chemistry &Technology of the Ministry of Education, Sichuan University,Chengdu 610064, P. R. China

Received Date: 2 February 2010
Available Online: 1 July 2010
Fund Project: 国家自然科学基金重点项目(20333030) (20333030)国家自然科学基金(20273043)资助 (20273043)

MnO_x-CeO₂/WO₃/ZrO₂-TiO₂monolithic catalyst was prepared by ZrO₂-TiO₂ as support, MnO_x-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 NO_x 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 od texture properties, middle strong acid sites, and higher O_xidation performance. The results of activity test showed that the monolith catalyst had not only od catalytic activity at low temperature but also a wide activity temperature window. The NO_x conversion is more than 90%in the temperature range of 144-374^oC at the space velocity of 10000 h^-1. It shows potential application in de-NO_x at low-temperature.
- Low temperature,
- Selective catalytic reduction,
- Tungsten trioxide,
- Nitrogen oxide,
- Monolithic catalysts
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沈阳化工大学材料科学与工程学院沈阳 110142

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

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通讯作者: 陈斌, bchen63@163.com

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