Journal of Northeastern University Natural Science ›› 2019, Vol. 40 ›› Issue (12): 1716-1720.DOI: 10.12068/j.issn.1005-3026.2019.12.009

• Materials & Metallurgy • Previous Articles     Next Articles

Preparation and Properties of xCeO2-yWO3-TiO2 Denitration Catalyst

BIAN Xue, HU Lyu, PENG Peng, LIU Si-yang   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2019-01-30 Revised:2019-01-30 Online:2019-12-15 Published:2019-12-12
  • Contact: BIAN Xue
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Abstract: Our country is facing the emission limitation of nitrogen oxide and the difficulty in handling dangerous waste of commercial catalyst (V2O5-WO3/TiO2). We propose a novel method of preparing xCeO2-yWO3/TiO2 catalysts by impregnation-thermal decomposition. The effects of active component contents Ce and W on denitration efficiency were studied. Catalyst 30Ce4W reaches the widest temperature range 310℃ and 285℃, with a denitration efficiency 90% and 95%, respectively. The structure and mechanism of the catalysts were characterized by XRD, XPS, BET, NH3-TPD and H2-TPR. The results showed that for catalyst 30Ce4W, the higher ratio of Ce4+ and chemisorbed oxygen content on the surface and the higher specific surface area were conducive to improving the denitration performances. The oxides on the surface were reduced readily and exhibited a great adsorption capacity for NH3. Thus its denitration effect was superior to other catalysts.

Key words: NH3-SCR, CeO2-WO3/TiO2, flue gas denitration, metatitanic acid, coprecipitation method

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