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

JIAO Feng-bin; ZHANG Ya-ping; SHEN Kai; SUN Ke-qin; XU Hai-tao; ZHOU Chang-cheng

Volume 40 Issue 10

Oct. 2012

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Article Navigation > Journal of Fuel Chemistry and Technology > 2012 > 40(10): 1258-1263

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.

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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.

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

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

Received Date: 2011-12-30
Rev Recd Date: 2012-03-08
Publish Date: 2012-10-31

Abstract

Abstract

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.
- Al₂O₃,
- TiO₂,
- SCR,
- catalyst,
- modification

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References(21)

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