화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.69, 66-76, January, 2019
DOI10.1016/j.jiec.2018.09.006  Export Citation
An environmentally friendly wide temperature CeWTiOx catalyst with superior performance for the selective catalytic reduction NOx with NH3
Huang Xiaosheng1, 2, Zhang Guodong1, Dong Fang1, and Tang Zhicheng1, †
  • 1State Key Laboratory for Oxo Synthesis and Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
  • 2University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
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A promising CeWTiOx catalyst for selective catalytic reduction of NOx with NH3 had been prepared by a facile one-pot solvothermal method, and the NO conversion could reach to 84% at 180 °C and maintain above 92% at the temperature range 200-460 °C. According to the NH3-TPD and N2 adsorption. desorption, surface acidity and surface area (229.44 m2/g) of the catalysts were enhanced significantly, both of them were beneficial to the NH3 adsorption in the SCR process. Besides, the results of XRD, XPS, Raman spectra and TEM indicated that the high dispersion of cerium active species as well as tungsten on anatase TiO2 was also indispensably for the excellent SCR performance. Combined with the strong reduction capacity from H2-TPR analysis as well as the enrichment of oxygen vacancy, it deserved the fine catalytic ability. More importantly, the strong synergistic effect between the Ce-W-Ti formed in the solvothermal system enhanced the catalyst’s resistance to H2O and SO2. Thus the solvothermal synthesis showed an attractive perspective in the preparation of metal oxides catalysts for the SCR process.
Keywords:Solvothermal synthesis;SCR performance;High dispersion;Large surface area;Synergistic effect
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