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Vol. 25 No. 11 (2013): Vol 25 Issue 11

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Effect of WO3 Addition Process on V2O5/TiO2 Monolithic Catalysts

https://doi.org/10.14233/ajchem.2013.14165
Yuanyuan He
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R. China
Qingcai Liu
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R. China
Jian Yang
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R. China
Wenchang Xi
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P.R. China

Corresponding Author(s) : Yuanyuan He

heyuanyuan119@163.com

Asian Journal of Chemistry, Vol. 25 No. 11 (2013): Vol 25 Issue 11

Abstract

Selective catalytic reduction catalysts were prepared by introducing WO3 with ammonium metatungstate instead of WO3-TiO2 powders. The surface and redox properties of these catalysts were investigated by BET, XRD, FT-Raman, H2-TPR and catalytic activity test. The results showed that the catalyst prepared by new WO3 addition technology had a less surface area and a smaller pore volume. However it exhibited a superior activity and presented a wider activity temperature window. The interaction of vanadia and tungsta on the surface of support was more intensify and consequently led to more octahedrally coordinated vanadyl species formed and tetrahedral wolframyl species appeared. These should be the reasons for the excellent performance of catalyst with WO3 fed by ammonium metatungstate in mixed procedure.

Keywords

WO3 Selective catalytic reduction De-NO FT-Raman spectroscopy TPR
He, Y., Liu, Q., Yang, J., & Xi, W. (2013). Effect of WO3 Addition Process on V2O5/TiO2 Monolithic Catalysts. Asian Journal of Chemistry, 25(11), 5912–5916. https://doi.org/10.14233/ajchem.2013.14165
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