Abstract
Boron and barium were employed as dopants for the VMgO system. The catalysts were characterized by ICP-OES, BET, IR, powder XRD, EDX, TPR-H2, TPD-NH3, XPS, and 51V MAS NMR. These catalysts were used for the oxidative dehydrogenation of n-octane in a continuous flow fixed bed reactor using air as an oxidant. Catalytic tests were carried out at a GHSV of 8000 h−1 and an n-octane to oxygen ratio of 0.8. The dopants induced some changes in the catalysts’ properties, e.g. the acid-base character, the reducibility, and the symmetry and the heterogeneity of the VO4 tetrahedra. Changes in the catalytic performance were also observed. Doping with barium enhanced styrene selectivity and yield, while boron adversely affected the activity and the ODH selectivity of the VMgO system. The catalytic activities may be explained by the reducibility of the vanadium species.
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Chaar, M.A., Patel, D., Kung, M.C., and Kung, H.H., J. Catal., 1987, vol. 105, p. 483.
Corma, A., López Nieto, J.M., and Paredes, N., J. Catal., 1993, vol. 144, p. 425.
Michalakos, P.M., Kung, M.C., Jahan, I., and Kung, H.H., J. Catal., 1993, vol. 140, p. 226.
Mamedov, E.A. and Cortés Corberán, V., Appl. Catal., A, 1995, vol. 127, p. 1.
Blasco, T., López Nieto, J.M., Dejoz, A., and Vazquez, M.I., J. Catal., 1995, vol. 157, p. 271.
Kung, H.H. and Kung, M.C., Appl. Catal., A, 1997, vol. 157, p. 105.
Blasco, T. and López Nieto, J.M., Appl. Catal., A, 1997, vol. 157, p. 117.
Elkhalifa, E.A. and Friedrich, H.B., Appl. Catal., A, 2010, vol. 373, p. 122.
Elkhalifa, E.A. and Friedrich, H.B., Catal. Lett., 2011, vol. 141, p. 554.
Hutchings, G.J., Appl. Catal., 1991, vol. 72, p. 1.
Principles and Practice of Heterogeneous Catalysis, Thomas, J.M. and Thomas, W.J., Eds., Weinheim: VCH, 1997.
The Basis and Applications of Heterogeneous Catalysis, Bowker, M., Ed., Oxford: Oxford Univ. Press, 1998.
Bhattacharvya, D., Bejand, S.K., and Rao, M.S., Appl. Catal., 1992, vol. 87, p. 29.
Valenzuela, R.X., Mamedov, E.A., and Cortés Corberán, V., React. Kinet. Catal. Lett., 1995, vol. 55, p. 213.
Organowski, W., Hanuza, J., Drulis, H., Mista, W., and Macalik, L., Appl. Catal., A, 1996, vol. 136, p. 143.
Stern, D.L., Michaels, J.N., DeCaul, L., and Grasselli, R.K., Appl. Catal., A, 1997, vol. 153, p. 21.
Dejoz, A., López Nieto, J.M., Márquez, F., and Vázquez, M.I., Appl. Catal., A, 1999, vol. 180, p. 83.
Sugiyama, S., Hashimoto, T., Morishita, Y., Shigemoto, N., and Hayashi, H., Appl. Catal., A, 2004, vol. 270, p. 253.
Sugiyama, S., Hashimoto, T., Tanabe, Y., Shigemoto, N., and Hayashi, H., J. Mol. Catal. A: Chem., 2005, vol. 227, p. 255.
Klisinska, A., Samson, K., Gressel, I., and Grzybowska, B., Appl. Catal., A, 2006, vol. 309, p. 10.
Klisinska, A., Loridant, S., Grzybowska, B., Stoch, J., and Gressel, I., Appl. Catal., A, 2006, vol. 309, p. 17.
Jin, M., Lu, P., Yu, G.X., Cheng, Z.M., Chen, L.F., and Wang, J.A., Catal. Today, 2013, vol. 212, p. 142.
Burch, R. and Swarnakar, R., Appl. Catal., 1991, vol. 70, p. 129.
Andersen, P.J. and Kung, H.H., Stud. Surf. Sci. Catal., 1993, vol. 75, p. 205.
Heterogeneous Catalytic Oxidation: Fundamental and Technological Aspects of the Selective and Total Oxidation of Organic Compounds, Hodnett, B.K., Ed., Chichester: Wiley, 2000.
Patel, D., Andersen, P.J., and Kung, H.H., J. Catal., 1990, vol. 125, p. 132.
Hanuza, J., Jerowska-Trzebiatowska, B., and Oganowski, W., J. Mol. Catal., 1985, vol. 29, p. 109.
Siew Hew Sam, D., Soenen, V., and Volta, J.C., J. Catal., 1990, vol. 123, p. 417.
Holgado, M.J., San Roman, S., Malet, P., and Rives, V., Mater. Chem. Phys., 2005, vol. 89, p. 49.
Infrared and Raman Spectra of Inorganic and Coordination Compounds, Nakamoto, K., Ed., New York: Wiley, 1986.
Burch, R. and Crabb, E.M., Appl. Catal., A, 1993, vol. 100, p. 111.
Labajos, F.M., Rives, V., Malet, P., Centeno, M.A., and Ulibarri, M.A., Inorg. Chem., 1996, vol. 35, p. 1154.
Chang, W.S., Chen, Y.Z., and Yang, B.L., Appl. Catal., A, 1995, vol. 124, p. 221.
Bond, G.C. and Tahir, S.F., Appl. Catal., 1991, vol. 71, p. 1.
Blasco, T. and López Nieto, J.M., Colloids Surf., A, 1996, vol. 115, p. 187.
Hayakawa, S., Yoko, T., and Sakka, S., Bull. Chem. Soc. Jpn., 1993, vol. 66, p. 3393.
Kung, H.H. and Michalakos, P.M., ACS Symp. Ser., 1993, p. 389.
Wachs, I.E. and Weckhuysen, B.M., Appl. Catal., A, 1997, vol. 157, p. 67.
Sugiyama, S., Hirata, Y., Nakagawa, K., Sotowa, K-I., Maehara, K., Himeno, Y., and Ninomiya, W., J. Catal., 2008, vol. 260, p. 157.
Haber, J., Catal. Today, 2009, vol. 142, p. 100.
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Elkhalifa, E.A., Friedrich, H.B. Effects of boron and barium dopants on VMgO catalysts employed in the oxidative dehydrogenation of n-octane. Kinet Catal 56, 212–221 (2015). https://doi.org/10.1134/S0023158415020020
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DOI: https://doi.org/10.1134/S0023158415020020