Abstract
This paper concerns the relation between surface structure of crystalline vanadia-like active species on vanadia–tungsta catalyst and their activity in the selective reduction of NO by ammonia to nitrogen. The investigations were performed for Ti–Sn-rutile-supported isopropoxy-derived catalyst. The SCR activity and surface species structure were determined for the freshly prepared catalyst, for the catalyst previously used in NO reduction by ammonia (320 ppm NO, 335 ppm NH3 and 2.35 vol% O2) at 573 K as well as for the catalyst previously annealed at 573 K in helium stream containing 2.35 vol% O2. The crystalline islands, exposing main V2O5 surface, with some tungsten atoms substituted for V-ones, were found, with XPS and FT Raman spectroscopy, to be present at the surface of the freshly prepared catalyst. A profound evolution of the active species during the catalyst use at 573 K was observed. Dissociative water adsorption on V5+OW6+ sites is discussed as mainly responsible for the catalyst activity at 473 K and that on both V5+OW6+ and V4+OW6+ sites as determining the activity at 523 K.
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References
H. Bosch and F. Janssen, Catal. Today 2 (1988) 369.
P. Forzatti and L. Lietti, Heter. Chem. Rev. 3 (1996) 33.
G. Busca, L. Lietti, G. Ramis and F. Berti, Appl. Catal. B 18 (1998) 1.
J.P. Chen and R.T. Yang, J. Catal. 125 (1990) 411.
P. Courtine, in: Solid State Chemistry in Catalysis, ACS Symp., Series 279, Vol. 37, eds. R.K. Grasselli and J.F. Brazdil (Am. Chem. Soc., Washington, DC, 1985).
H.G. Bachman and W.H. Burnes, Z. Kristallogr. 115 (1961) 215.
K. Tarama, M. Teranishi and S. Yoshida, Bull. Inst. Chem. Res., Kyoto Univ. 46 (1968) 185.
M. Coldea, L. Stanescu and I. Ardelean, Phys. Stat. Sol. A 26 (1974) 145.
E. Brocławik, A. Góra and M. Najbar, J. Mol. Catal., submitted.
M. Najbar, E. Brocławik, A. Góra, A. Białas and A. Wesełucha-Birczyńska, Phys. Chem. Lett., submitted.
L. Lietti, I. Nova, E. Tronconi and P. Forzatti, AIChE J. 43 (1997) 2559.
M. Najbar, A. Białas, J. Camra and B. Borz{ie138-01}cka-Prokop, in: Proc. 1st World Congr. Env. Catal., Pisa, 1995, p. 283.
M. Najbar and J. Camra, Solid State Ionics 101–103 (1997) 707.
M. Najbar, A. Białas, F. Mizukami, A. Wesełucha-Birczyńska, E. Bielańska and A. Góra, Pol. J. Env. Stud. 6 (1997) 83.
M. Najbar, J. Camra, A. Białas, A. Wesełucha-Birczyńska, B. Borz{ie138-02}cka-Prokop, L. Delevoye and J. Klinowski, Phys. Chem. Chem. Phys. 1 (1999) 4645.
M. Gąsior and B. Grzybowska, Bull. Acad. Pol. Sci., Ser. Sci. Chim. 27 (1979) 835.
L. Depero, P. Bonzi and M. Zocchi, C. Casale and G. De Michele, J. Matter. Res. 8 (1993) 2713.
R. Mariscal, M. Galan-Fereres, J. Anderson L. Alemany, J. Palacios and J. Fierro, in: Proc. 1st World Congr. Env. Catal., Piza, 1995, p. 223.
C. Cristiani, M. Bellotto, P. Forzatti and F. Bregani, J. Mater. Res. 8 (1993) 2019.
L.E. Depero, J. Solid State Chem. 104 (1993) 470.
L.E. Depero, P. Bonzi, M. Musci and C. Casale, J. Solid State Chem. 111 (1994) 247.
K.P. Kumar, K. Keizer, A.J. Burggraaf, T. Okubo and H. Nagamoto, J. Mater. Chem. 3 (1993) 923.
JCPDF Card No. 14 576.
B. Gerand, G. Nowogrodzki and M. Figlarz, J. Solid State Chem. 38 (1981) 312.
R. Roth and J. Waring, J. Res. NBS 70A (1966) 281.
B. Gerand, G. Nowogrodzki, J. Guenot and M. Figlarz, J. Solid State Chem. 29 (1979) 429.
D. Dollimore and G.R. Heal, J. Appl. Chem. 14 (1964) 109.
G. Exarhos and N. Hess, Thin Solid Films 220 (1992) 254.
T.R. Gilson, O.F. Bizri and N. Cheetham, J. Chem. Soc. Dalton Trans. 291 (1973).
I.R. Beattie and T.R. Gilson, J. Chem. Soc. A (1969) 2322.
I.E. Wachs, R.Y. Saleh, S.S. Chan and C.C. Cherissh, Appl. Catal. 15 (1985) 339.
T. Machej, J. Haber, A.M. Turek and I.E. Wachs, Appl. Catal. 70 (1991) 115.
M. Najbar, A. Białas, A. Wesełucha-Birczyńska, in: Proc. Int. Conf. on Catalysis and Adsorption in Fuel Processing and Environmental Protection, eds. B. Pniak, J. Trawczński and J. Walendziewski (Wrocław University of Technology, Wrocław, 1999) p. 427.
I. Wachs and S. Chan, Appl. Surf. Sci. 20 (1984) 181.
K. Brzezinka, B. Lucke, A. Martin, M. Meisel and K. Witke, Chem. Mater. 9 (1997) 1086.
A. Bielański and M. Najbar, Appl. Catal. A 157 (1997) 223.
A. Michalak, M. Witko and K. Hermann, Surf. Sci. 375 (1997) 385.
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Najbar, M., Mizukami, F., Białas, A. et al. Evolution of Ti–Sn-rutile-supported V2O5–WO3 catalyst during its use in nitric oxide reduction by ammonia. Topics in Catalysis 11, 131–138 (2000). https://doi.org/10.1023/A:1027299931119
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DOI: https://doi.org/10.1023/A:1027299931119