NDLI: SO 2 resistant antimony promoted V 2O 5/TiO 2 catalyst for NH 3-SCR of NO x at low temperatures

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SO 2 resistant antimony promoted V 2O 5/TiO 2 catalyst for NH 3-SCR of NO x at low temperatures

Content Provider	Semantic Scholar
Author	Phil, Ha Heon Reddy, Maddigapu Pratap Kumar, Pullur Anil Ju, Lee Kyung Hyo, Jung Soon
Copyright Year	2008
Abstract	To get the low temperature sulfur resistant V2O5/TiO2 catalysts quantum chemical calculation study was carried out. After selecting suitable promoters (Se, Sb, Cu, S, B, Bi, Pb and P), respective metal promoted V2O5/TiO2 catalysts were prepared by impregnation method and characterized by X-ray diffraction (XRD) and Brunner Emmett Teller surface area (BET-SA). Se, Sb, Cu, S promoted V2O5/TiO2 catalysts showed high catalytic activity for NH3 selective catalytic reduction (NH3-SCR) of NOx carried at temperatures between 150 and 400 8C. The conversion efficiency followed in the order of Se > Sb > S > V2O5/TiO2 > Cu but Se was excluded because of its high vapor pressure. An optimal 2 wt% ‘Sb’ loading was found over V2O5/TiO2 for maximum NOx conversion, which also showed high resistance to SO2 in presence of water when compared to other metal promoters. In situ electrical conductivity measurement was carried out for Sb(2%)/V2O5/TiO2 and compared with commercial W(10%)V2O5/TiO2 catalyst. High electrical conductivity difference (DG) for Sb(2%)/V2O5/TiO2 catalyst with temperature was observed. SO2 deactivation experiments were carried out for Sb(2%)/V2O5/TiO2 and W(10%)/V2O5/TiO2 at a temperature of 230 8C for 90 h, resulted Sb(2%)/ V2O5/TiO2 was efficient catalyst. BET-SA, X-ray photoelectron spectroscopy (XPS) and carbon, hydrogen, nitrogen and sulfur (CHNS) elemental analysis of spent catalysts well proved the presence of high ammonium sulfate salts over W(10%)/V2O5/TiO2 than Sb(2%)/V2O5/TiO2 catalyst. # 2007 Elsevier B.V. All rights reserved. www.elsevier.com/locate/apcatb Available online at www.sciencedirect.com Applied Catalysis B: Environmental 78 (2008) 301–308
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.ugcfrp.ac.in/images/userfiles/61706-2_ApplCatB.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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