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Preparation of WO3/TiO2 and V2O5/TiO2 powders and their catalytic performances in the SCR of NOX

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2006, 16(5), pp.216-221
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

BYEONG WOO LEE 1 TAE-SUK LEE 1 Shin Dong-Woo 2 이인규 1

1한국해양대학교
2경상대학교

Accredited

ABSTRACT

An investigation of the influence of WO3 and V2O5 catalysts on the microstructure, phase formation and selective catalytic reduction (SCR) efficiency of the synthesized SCR powders has been carried out. A commercial anatase-TiO2 was used as the catalysts support. For WO3(10 wt%)/TiO2, the W loading to the TiO2 support led to the lower in anatase to rutile transition temperature from 1200oC of TiO2 support to ~900oC. The transition temperature was also lowered to below 650oC in the V2O5 (5 and 10 wt%) added composition. The WO3(10 wt%)/TiO2 SCR powder obtained at 450oC showed near 100 % of NOX conversion efficiency at 350~400oC and for the powder prepared at 650oC the same efficiency was achieved in wider temperature range 300~400oC. The highest NOX conversion efficiency of 100 % was obtained in the V2O5(5 wt%)/TiO2 SCR composition calcined at 650oC in the relatively wider temperature range 250~350oC, while the catalytic efficiency considerably decreased for the V2O5(10 wt%)/TiO2. The lowered conversion efficiency of NOX observed in the V2O5(10 wt%)/TiO2 composition calcined at 650oC was considered to be correlated with the lowered surface area resulting from the increased crystallite growth by highly reactive vanadium loading.

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