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Citation: JIAO Feng-bin, ZHANG Ya-ping, SHEN Kai, SUN Ke-qin, XU Hai-tao, ZHOU Chang-cheng. γ-Al2O3 modification on V2O5-WO3/TiO2 catalyst for selective catalytic reduction(SCR) of NO[J]. Journal of Fuel Chemistry and Technology, ;2012, 40(10): 1258-1263. shu

γ-Al2O3 modification on V2O5-WO3/TiO2 catalyst for selective catalytic reduction(SCR) of NO

  • 1.

    Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

  • Corresponding author: ZHANG Ya-ping, 
  • Received Date: 30 December 2011
    Available Online: 8 March 2012

    Fund Project: 国家高技术研究发展计划(863计划, 2007AA061802) (863计划, 2007AA061802) 江苏省自然科学基金(BK2012347)。 (BK2012347)

  • A series of titania-alumina mixed oxide with different amount of γ-Al2O3were prepared by sol-gel methods, which were loaded by V2O5 and WO3 to obtain several SCR catalysts. Surface properties of those samples were studied by various characterizations techniques, like XRD, BET, H2-TPR and HRTEM. The catalytic performance for the selective catalytic reduction of NO with NH3(NH3-SCR)and the effect of SO2 in the simulated smog on the catalytic activity were investigated as well. It is found that the synergy between γ-Al2O3 and TiO2 can improve effectively the catalytic performance of V2O5-WO3/TiO2-γ-Al2O3 catalysts effectively and broaden the temperature window of SCR activity as well as strengthen the resistance to SO2 poisoning. In particular, the V2O5-WO3/TiO2-15% γ-Al2O3 sample exhibited 80% NO conversion in the wide temperature range of 310~460 ℃.All the characterization results show that γ-Al2O3 is in a well-dispersed state on the surface of TiO2; the composite support has a large specific surface area and the binary oxide possesses a comparatively strong redox property.
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