Ümit Bilge DEMİRCİ, François GARIN

Examination of Gold as a Metal Promoter of Sulphated Zirconia in n-Heptane Isomerisation at Low Temperature

Isomerisation of nC7 over a sulphated zirconia (SZ)-based bifunctional catalyst was studied at 150 °C. Au, Ir, Pd and Pt were used as promoters of SZ. The first objective was the production of C7 isomers with high octane numbers. PtSZ is the most suitable catalyst despite low conversions and a high proportion of methylhexanes instead of dimethylpentanes. The second objective was to assess Au as a promoter of SZ. Au shows slight hydrogenation abilities, displaying behaviour similar to that of Pd, but is inactive towards alkane activation. These promising but inadequate results suggested that Au could be used as the metallic function of bifunctional catalysts if the support were judiciously chosen and the preparation method optimised.

Anahtar Kelimeler:

Turk. J. Chem., 31, (2007), 105-111. Full text: pdf Other articles published in the same issue: Turk. J. Chem., vol.31, iss.1.

Examination of Gold as a Metal Promoter of Sulphated Zirconia in n-Heptane Isomerisation at Low Temperature

Keywords:

Turk. J. Chem., 31, (2007), 105-111. Full text: pdf Other articles published in the same issue: Turk. J. Chem., vol.31, iss.1.,

PDF

___

M. Hino, S. Kobayashi and K. Arata, J. Am. Chem. Soc. 101, 6439-41 (1979).
G.D. Yadav and J.J. Nair, Micropor. Mesopor. Mater. 33, 1-48 (1999).
T. Kimura, Catal. Today 81, 57-63 (2003).
A. O’Cinneide and F.G. Gault, J. Catal. 37, 311-323 (1975).
D.I. Hagen and G.A. Somorjai, J. Catal. 41, 466-481 (1976).
J. Wang and B.E. Koel, J. Phys. Chem. A 102, 8573-9 (1998).
T. Salama, R. Onishi, T. Shido and M. Ichikawa, J. Catal. 162, 169-178 (1996).
R.M. Torres Sanchez, A. Ueda, K. Tanaka and M. Haruta, J. Catal. 168, 125-127 (1997).
G.J. Hutchings, Catal. Today 72, 11-17 (2002).
R.J.H. Grisel, P.J. Kooyman and B.E. Nieuwenhuys, J. Catal. 191, 430-7 (2000).
M. Haruta and M. Dat´e, Appl. Catal. A 222, 427-437 (2001).
M. Chatenet, F. Micoud, I. Roche and E. Chainet, Electrochim. Acta in press, (2006).
A. Wolf and F. Sch¨uth, Appl. Catal. A 226, 1-13 (2002).
G.A. Mills, H. Heinemann, T.H. Milliken and A.G. Oblad, Ind. Chem. Chem. 45, 134-7 (1953).
W.M.H. Sachtler and Z. Zhang, Adv. Catal. 39, 129-220 (1993).
J.M. Manoli, C. Potvin, M. Muhler, U. Wild, G. Resofszki, T. Buchholz and Z. Pa`al, J. Catal. 178, 338-351 (1998).
U.B. Demirci and F. Garin, Catal. Lett. 76, 45-51 (2001). ¨
K. F¨ottinger, G. Kinger and H. Vinek, Appl. Catal. A 266, 195-202 (2004).
D. Tichit, B. Coq, H. Armenda riz a nd F. Figu´eras, Catal. Lett. 38, 109-113 (1996).
Z. Pa`al, U. Wild, M. Muhler, J.M. Manoli, C. Potvin, T. Buchholz, S. Sprenger and G. Resofszki, Appl. Catal. A 188, 257-266 (1999).
B. Hammer and J.K. Nİrskov, Adv. Catal. 45, 71-145 (2000).
M. Hino and K. Arata, Catal. Lett. 30, 25-30 (1995).
F.C. Lange, T.K. Cheung and B.C. Gates, Catal. Lett. 41, 95-9 (1996).
C.R. Vera, J.C. Yori and J.M. Parera, Appl. Catal. A 167, 75-84 (1998).
T. Lİften and E.A. Blekkan, Appl. Catal. A 299, 250-7 (2006).
B. Grzybowska-´Swierkosz, Catal. Today 112, 3-7 (2006).
C. Louis, Actualit´e Chimique 282, 49-50 (2005).
J.M. Grau, J.C. Yori and J.M. Parera, Appl. Catal. A 213, 247-257 (2001).