Abstract
The disproportionation ofn-butane (and of isobutane) was catalyzed by sulfated zirconium oxide containing 1.5 wt% Fe, 0.5 wt% Mn, and 4.0 wt% sulfate at 2.0 atm and temperatures in the range of 30–60‡C. The reaction accompanies isomerization, which under some conditions is as much as one or two orders of magnitude faster than disproportionation. The conversion to each of the products increased with time on stream in a flow reactor, and then declined. The time on stream for maximum conversion was the same for each product. The results suggest that the disproportionation and isomerization reactions proceed through a common C8 intermediate. Rates of the disproportionation reaction were determined at the time on stream corresponding to the maximum conversion at each temperature; for example, the rate of conversion ofn-butane into isopentane at 60‡C with ann-butane partial pressure of 0.58 atm was about 1×10−7 mol/(g of catalyst s).
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C.-Y. Hsu, C.R. Heimbuch, C.T. Armes and B.C. Gates, J. Chem. Soc. Chem. Commun. (1992) 1645.
A. Jatia, C. Chang, J.D. MacLeod, T. Okubo and M.E. Davis, Catal. Lett. 25 (1994) 21.
A.S. Zarkalis, C.-Y. Hsu and B.C. Gates, Catal. Lett. 29 (1994) 235; Erratum 30 (1995) 319.
T.-K. Cheung, J.L. d'Itri and B.C. Gates, J. Catal. 151 (1995) 464.
A.S. Zarkalis, MChE Thesis, University of Delaware, USA (1993).
C.R. Heimbuch, MChE Thesis, University of Delaware, USA (1992).
C.A. Fuentes and B.C. Gates, J. Catal. 76 (1982) 440.
V. Adeeva, G.D. Lei and W.M.H. Sachtler, Appl. Catal. A 118 (1994) L11.
M. Guisnet, F. Avendano, C. Bearez and F. Chevalier, J. Chem. Soc. Chem. Commun. (1985) 336.
C. Bearez, F. Avendano and M. Guisnet, Bull. Soc. Chim. France 3 (1985) 346.
T.-K. Cheung, F.C. Lange and B.C. Gates, Catal. Lett. 34 (1995)351.
T.-K. Cheung, J.L. d'Itri and B.C. Gates, J. Catal. 153 (1995) 344.
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Zarkalis, A.S., Hsu, C.Y. & Gates, B.C. Butane disproportionation catalyzed by sulfated zirconia promoted with iron and manganese. Catal Lett 37, 1–4 (1996). https://doi.org/10.1007/BF00813510
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DOI: https://doi.org/10.1007/BF00813510