Abstract
Catalytic combustion of benzene over supported metal oxides has been investigated. The catalysts have been prepared by incipient wetness method and characterized by XRD, FT-Raman, ESR and TPR. Among supported metal oxides, CuOx, supported on TiO2 is found to have the highest activity for benzene oxidation. In addition, among the catalysts of copper oxide supported on TiO2, A12O3 and SiO2, titania-supported catalyst (CuOx/TiO2) gives the highest catalytic activity. CuOx/TiO2 (Cu loading 5.5 wt%) shows the total oxidation of benzene at about 250 °C. From the ESR and FT-Raman results, the CuO dispersed on the TiO2 surface acts as an active site of CuOx/TiO2 catalysts on the oxidative decomposition of benzene. The catalytic activity gradually increases with an increase of Cu loading on TiO2. When Cu loading reaches 5.5 wt%, the total conversion temperature is lowered to 300 °C. However, the catalytic activity considerably decreases at 7 wt% Cu loading. The catalytic activity increased with an increase of oxygen concentration but the concentration of benzene showed no difference in the benzene conversion. This result suggests that the rate determining step is the adsorption of oxygen.
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References
Beiger, J. and Roth, J. F., “Copper oxide Supported on Alumina. II. Electron Spin Resonance Studies of Highly Dispersed Phase”,J. Phys. Chem.,71, 4307 (1967).
Cho, S. J., Ryoo, M. W., Soun, K. S., Lee, S. K. and Kang, K. S, “A Catalytic Combustion Technology of Concentrated VOCs in Textile Coating Process”,Korean J. Chem. Eng.,16, 478 (1999).
Coq, B., Tachon, D., Figueras, F, Mabilon, G. and Prigent, M., “Selective Catalytic Reduction of Nitrogen Monoxide by Decane on Copper-exchanged Mordenites”Appl. Catal., B,6, 271 (1995).
Cordoba, G., Viniegra, M., Fierro, J. L. G., Padolla, J. and Arroyo, R., “TPR, ESR, and XPS Study of Cu2+ Ions in Sol-Gel Derived TiO2”,J. Solid State Chem.,138, 1 (1998).
Dow, W., Wang, Y. and Huang, T, “Yttria-Stabilized Zirconia Supported Copper Oxide”,J. Catal.,160, 155 (1996).
Ferreira, R. S. G., Oliveira, P. G. P. and Noronha, F. B., “The Effect of the Nature of Vanadium Species on Benzene Total Oxidation”,Appl. Catal., B,29, 275 (2001).
Gallardo-Amores, J. M., Armaroli, T., Ramis, G., Finocchio, E. and Busca, G., “A Study of Anatase-supported Mn Oxide as Catalysts for 2-Propanol Oxidation”,Appl. Catal. B,22, 249 (1999).
Hutchings, G. I., Heneghan, C. S., Hudson, I. D. and Taylor, S. H, “Uranium-oxide-based Catalysts for the Destruction of Volatile Chloroorganic Compounds”,Nature,384, 341 (1996).
Kim, H. I., Yang, J. C., Jung, K. T., Shul, Y. G., Chun, K. Y, Han, H. S., Joe, Y. I. and Kim, Y. W., “Performance of Ceramic Composite Membrane for the Separation of VOCs”,Korean J. Chem. Eng.,18, 662 (2001).
Larsson, P. and Andersson, A., “Complete Oxidation of CO, Ethanol, and Ethyl Acetate over Copper Oxide Supported on Titania and Ceria Modified Titania”,J. Catal,179, 72 (1998).
Larsson, P., Andersson, A., Wallenberg, L. R. and Svensson, B., “Combustion of CO and Toluene; Characterization of Copper Oxide Supported on Titania and Activity Comparisons with Supported Cobalt, Iron, and Manganese Oxide”,J. Catal.,163, 279 (1996).
Liu, Y, Luo, M., Wei, Z, Xin, Q., Ying, P. and Li, C., “Catalytic Oxidation of Chlorobenzene on Supported Manganese Oxide Catalysts”Appl. Catal. B,29, 61 (1999).
Reimann, K. and Syassen, K., “Pressure Dependence of Raman Modes in CuO”,Solid State Commun.,76, 137 (1990).
Sanati, M., Andersson, A., Wallenberg, L. R. and Rebenstorf, B., “Zirconia-supported Vanadium Oxide Catalysts for Ammoxidation and Oxidation of Toluene: A Characterization and Activity Study”,Appl. Catal, A,106, 51(1993).
Satterfield, C. N., “Heterogeneous Catalysis in Industrial Practise”, 2nd ed., McGraw-Hill, New York (1991).
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Hong, SS., Lee, GH. & Lee, GD. Catalytic combustion of benzene over supported metal oxides catalysts. Korean J. Chem. Eng. 20, 440–444 (2003). https://doi.org/10.1007/BF02705544
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DOI: https://doi.org/10.1007/BF02705544