The influence of alumina used as a support on the catalytic properties of Pt/Sn/Al2O3 systems in the dehydrogenation of isobutane

Journal of the Iranian Chemical Research

مقاله 3، دوره 1، شماره 1، دی 2008، صفحه 19-24   

نویسندگان

Sedigheh Vaezifar^{* 1}؛ hossein Faghihian²؛ Mehdi kamali³

¹Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran Fadak Chemical Company, Isfahan Science and Technology Town (ISTT), Isfahan, Iran

²Department of Chemistry, University of Isfahan, Isfahan 81746-73441, Iran

³Central Laboratory, Faculty of Modern Sciences & Technologies, University of Isfahan, Isfahan 81746-73441, Iran

چکیده

In this research different types of Al₂O₃ were used as supports to prepare catalysts for dehydrogenation of isobutane to isobutene. These supports were Al₂O₃ from Merck, Axen and gamma Al₂O₃ synthesized from Al(OH)₃. Sn/Pt/Al₂O₃ catalysts were prepared by sequential impregnation, at first Pt and then Sn was deposited. Characterization of catalysts was performed by X-ray powder diffraction (XRD) and thermal analysis (TG/DTG) techniques. Elemental analysis of the catalysts was also carried out by wet chemical analysis using inductively coupled plasma (ICP) technique. Isobutane dehydrogenation was studied in a reactor under atmospheric pressure at 848 K. The conversion, selectivity and yield of the prepared catalysts were calculated.

کلیدواژه‌ها

Bimetallic catalysts preparation؛ Supported platinum–tin catalysts؛ Dehydrogenation؛ Isobutene

مراجع

[1] E.O. Box, L.E. Drehman, F. Farha, German Patent, No. 2 127 353, 1970.
[2] M.E. Olbrich, D.L. McKay, D.P. Montgomery, US Patent, No. 4 926 005, 1989.
[3] F. Wilhelm, Dutch Patent, No. 2 164 295, 1972.
[4] F.C. Wihelm, U.S. Patent, No. 3 755 480, 1973.
[5] D.E. Resasco, G.L. Haller, Catalysis 11 (1994) 379.
[6] T. Hutson Jr, W.C. McCarthy, Handbook of Petroleum Refining Processes, McGraw-Hill, London, 1986.
[7] P.R. Pujado, B.V. Vora, Hydrocarbon Process, 1990.
[8] G.F. Hornaday, F.M. Ferrell, G.A. Mills, Adv. Petrol. Chem. Refining 4 (1961) 451.
[9] J. Llorca, N. Homs, Applied Catalysis A: General 189 (1999) 77.
[10] F. Humblot, J.P. Candy, F. Le Peltier, B. Didillon, J.M. Basset, J. Catalysis 179 (1998) 459.
[11] F.Z. Bentahar, J.P. Canday, Catalysis Today 66 (2000) 303.
[12] F. Pinna, Catalysis Today, 41 (1998) 129.
[13] M.A. Centeno, M. Debois, P. Grange, J. Catalysis 192 (2000) 296.