skip to main content

Phy-chemical Attributes of Nano-scale V2O5/TiO2 Catalyst and Its’ Effect on Soot Oxidation

1School of Automobile and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China

2School of Energy, Soochow University, Suzhou, Jiangsu 215006, China

Received: 25 Oct 2015; Revised: 25 Dec 2015; Accepted: 5 Jan 2016; Available online: 30 Jun 2016; Published: 20 Aug 2016.
Open Access Copyright (c) 2016 by Authors, Published by BCREC Group under

Citation Format:
Cover Image

The V2O5 catalysts which supported on nano-scale TiO2 with variation of vanadium contents (5%, 10%, 20% and 40%) were prepared by an incipient-wetness impregnation method. The phase structures of nano-scale V2O5/TiO2 catalysts with different loading rates were characterized by Scanning electron microscope (SEM), X-Ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectra. The oxidation activities of catalysts over diesel soot were performed in a themogravimetric analysis (TGA) system. The kinetics of the catalytic oxidation process were analyzed based on Flynn-Wall-Ozawa method. The characterization results showed that the phase structure of V2O5 supported on TiO2 depends heavily on the vanadium contents, which will put great effects on the catalytic performances for soot oxidation. At a low vanadium loading rates (V5-V20), active species exist as monomers and polymeric states. At a high loading rate (V40), the crystalline bulk V2O5 covers the surface of TiO2. The formed crystal structure occupied the active sites and led a decreasing in the catalytic effect. By comparing the characteristics temperatures of soot oxidation over V2O5 catalysts, the catalytic activities of catalysts with different loading rates for soot oxidation can be ranked as: V5 < V10 < V40 < V20. Via pyrolysis kinetics analysis, it is revealed that the activation energy of soot oxidation is minimum when the vanadium loading rates is 20%, which is fit well with the TG experimental results. The consistency of pyrolysis kinetics and TG experimental results confirm that the best activity catalyst is V20 in discussed catalysts of this paper, which is nearest to the monolayer dispersion saturated state of V2O5/TiO2 catalyst. Moreover, it convincingly demonstrate the obvious threshold effect in V2O5 catalysts. 

Fulltext View|Download
Keywords: V2O5/TiO2 catalyst; phy-chemical attributes; diesel; soot; catalytic combustion

Article Metrics:

  1. Leocadio, I.C.L., Braun., S., Schmal, M. (2004). Diesel soot combustion on Mo/Al2O3 and V/Al2O3 catalysts: investigation of the active catalytic species. Journal of Catalysis, 223(1): 114-121
  2. Toniolo, F., Elisa, B., Schwaab, M., Leocadio, I., Aderne, R., Schmal, M., Pinto, J. (2008). Kinetics of the catalytic combustion of diesel soot with MoO3/Al2O3 catalyst from thermogravimetric analyses. Applied Catalysis A: General, 342(1-2): 87-92
  3. Prasad, R., Bella, V.R. (2010). A review on diesel soot emission, its effect and control. Bulletin of Chemical Reaction Engineering & Catalysis, 5(2): 69-86 (DOI: 10.9767/bcrec.5.2.794.69-86)
  4. Malleswara, Rao, T.V., Vico-Ruiz, E., Bañaresb, M.A., Deo, G. (2008). Obtaining the best composition of supported V2O5-MoO3/TiO2 catalyst for propane ODH reaction. Journal of Catalysis, 258(2): 324-333
  5. Albonetti, S., Blasioli, S., Bruno, A., Epoup, Mengoua, J., Trifirò, F. (2006). Effect of silica on the catalytic destruction of chlorinated organics over V2O5/TiO2 catalysts. Applied Catalysis B: Environmental, 64(1-2): 1-8
  6. Lin, Y.C., Chang, C.H., Chen, C.C., Jehngc, J.M., Shyu, S.G. (2006). Supported vanadium oxide catalysts in selective oxidation of ethanol: Comparison of TiO2/SiO2 and ZrO2/SiO2 as supports. Catalysis Communications, 64(1-2): 1-8
  7. Woojoon, C., Sungmin, C., Eunseuk, P., Yunb, S.T., Jurng, J. (2013). Effect of V2O5 loading of V2O5/TiO2 catalysts prepared via CVC and impregnation methods on NOx removal. Applied Catalysis B: Environmental, 140-141: 708-715
  8. Uchisawa, J., Obuchi, A., Ohi, A., Nanba, T., Nakayama, N. (2008). Activity of catalysts supported on heat-resistant ceramic cloth for diesel soot oxidation. Powder Technology, 180(1-2): 39-44
  9. Liu, J., Zhao, Z., Xu, C.M., Duana, A.J., Zhu, L. Wang, X.Z. (2005). Diesel soot oxidation over supported vanadium oxide and K-promoted vanadium oxide catalysts. Applied Catalysis B: Environmental, 61(1-2): 36-46
  10. Liu, J., Zhao, Z., Peng, L., Xu, C.M., Duan, A.J., Jiang, G.Y., Lin, W.Y., Wachs, I.E. (2008). Study on the reaction mechanism for soot oxidation over TiO2 or ZrO2-supported vanadium oxide catalysts by means of In-situ UV-Raman. Catalysis letters, 120(1-2): 148-153
  11. Neri, G., Rizzo, G., Galvagno, S., Musolinob, M.G., Donatob, A., Pietropaolo, R. (2002). Thermal analysis characterization of promoted vanadium oxide-based catalysts. Thermochimica Acta, 381(2): 165-172
  12. Lopez-Fónseca, R., Elizundia, U., Landa, I., Gutiérrez-Ortiz, M.A., González-Velasco, J.R. (2005). Kinetic analysis of non-catalytic and Mn-catalysed combustion of diesel soot surrogates. Applied Catalysis B: Environmental, 61(1-2): 150-158
  13. Zhao, Z., Zhang, G.Z., Liu, J., Liang, P., Xu, J. (2008). Latest research progresses in catalysts for the purification of exhaust gases from diesel engines. Chinese Journal of Catalysis, 29(3): 303-312
  14. Hensgen, L., Stöwe, K. (2011). Soot-catalyst contact studies in combustion processes using nano-scaled ceria as test material. Catalysis Today, 159(1): 100-107
  15. Vyazovkin, S. (2000). Kinetic concepts of thermally stimulated reactions in solids: A view from a historical perspective. International Reviews in Physical Chemistry, 19(1): 45-60
  16. Doyle, C.D. (1961). Kinetic Analysis of Thermogravimetric Data. J. Appl. Polym. Sci, 5(15): 285-92
  17. Ozawa, T. (1965). A new method of analyzing thermogravimetric data. Bull. Chem. Soc. Jan, 1965, 38(11): 1881-1886
  18. Flynn, J.H., Wall, L.A. (1966). A quick, direct method for the determination of activation energy from thermogravimetric data. Journal of Polymer Science Part B: Polymer Letters, 4(5): 323-328
  19. Wang, X., Zhao, B., Jiang, D.E., Xie, Y.C. (1999). Monolayer dispersion of MoO3, NiO and their precursors on γ-Al2O3. Applied Catalysis A General, 188(1): 201–209
  20. Liu, X.J., Gu, X.D., Shen, J.Y. (2003). Structure, surface acidity/ basicity and redox properties of V2O5/TiO2 catalysts. Chinese Journal of Catalysis, 24(9): 674-680
  21. Singh, S., Jonnalagadda, S.B. (2008). Selective oxidation of n-Pentane over V2O5 supported on hydroxyapatite. Catalysis Letters, 126(1-2): 200-206
  22. Li, C., Zhang, H., Wang, K.L., Qin, X. (1994). FT-IR emission spectroscopic studies of surface structure of V2O5/TiO2 catalyst. Acta Physico-Chimica Sinica, 10(1): 33-37
  23. Alvarez-Puebla, R.A., Garrido, J.J., Aroca, R.F. (2004). Surface-enhanced vibrational microspectroscopy of fulvic acid micelles. Analytical Chemistry, 76(23): 7118-7125
  24. Yezerets, A., Currier, N.W., Kim, D.H., Eadlera, H.A., Eplinga, W.S., Peden, C.H.F. (2005). Differential kinetic analysis of diesel particulate matter (soot) oxidation by oxygen using a step–response technique. Applied Catalysis B Environmental, 61(1-2): 120-129
  25. Sharma, H.N., Pahalagedara, L., Joshi, A., Suib, S.L., Mhadeshwar, A.B. (2012). Experimental study of carbon black and diesel engine soot oxidation kinetics using thermogravimetric analysis. Energy Fuels 26(9): 5613-5625

Last update:

No citation recorded.

Last update:

No citation recorded.