Abstract
Iron catalysts supported on ZSM-5 zeolites of a wide range of silica-to-alumina ratios (29-∞) have been prepared and tested in carbon monoxide hydrogenation. The crystalline phases of the catalysts were characterized by X-ray diffraction and their acidity by infrared spectroscopy of adsorbed pyridine. The catalytic tests were conducted at 533 K, an overall pressure of 21 bar and a feed ratio CO/H2 close to 1. It was found that the selectivity to light olefins (C2–C4) increases in parallel with the increase of the Si/Al ratio of the zeolite. This was explained in terms of the decrease in Brønsted acidity of the catalysts. As a consequence, very high olefin selectivities can be achieved by decreasing the number of strong acid sites in the zeolite structure, but at the expense of high oxygenate formation.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M.E. Dry, in:Catalysis Science and Technology, eds. J.R. Anderson and M. Boudart (Springer, Berlin, 1981)pp. 159–256.
R.B. Anderson,The Fischer-Tropsch Synthesis (Academic Press, New York, 1984).
D.L. King, J.A. Cusumano and R.L. Garten, Catal. Rev.-Sci. Eng. 23 (1981) 233.
C.H. Bartholomew, Catal. Lett. 7 (1990) 303.
R. Snell, Catal. Rev.-Sci. Eng. 29 (1987) 361.
M. Janardanarao, Ind. Eng. Chem. Res. 29 (1990) 1735.
V.U.S. Rao and R.J. Gormley, Hydroc. Process. 11 (1980) 139.
F.G. Dwyer and W.E. Garwood,Catalytic Conversions of Synthesis Gas and Alcohols to Chemicals (Plenum Press, New York, 1984) p. 151.
X. Wenyang, L. Ruifeng, D. Tao and M. Jinghong, Zeolites 10 (1990) 200.
E. Costa, M.A. Uguina, A. de Lucas and J. Blanes, J. Catal. 107 (1987) 317.
W.F. Hillebrand, C.E.F. Lundell, H.H. Bright and J.I. Hoffman,Applied Inorganic Analysis (Wiley, New York, 1953).
G. Calleja, A. de Lucas and R. van Grieken, Appl. Catal. 68 (1991) 11.
D.Z. Wang, X.D. Lu, X.Y. Dou, W.B. Li and C.H. Yang, Appl. Catal. 59 (1990) 75.
S.S. Pollack, J.W. Adkins, E.L. Wetzel and D. Newbury, Zeolites 4 (1984) 181.
E.P. Parry, J. Catal. 2 (1963) 371.
M.R. Basila and T.R. Kantner, J. Phys. Chem. 70 (1966) 1681.
J.C. Vedrine, A. Auroux, V. Bolis, P. Dejaijve, C. Naccache, P. Wierchowski, E.G. Derouane, J.B. Nagy, J.P. Gilson, J.H.C. van Hooff, J.P. van den Berg and J. Wolthuizen, J. Catal. 69 (1979) 248.
N.Y. Topsoe, K. Pedersen and E.G. Derouane, J. Catal. 70 (1981) 41.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Calleja, G., de Lucas, A., van Grieken, R. et al. Carbon monoxide hydrogenation over Fe/HZSM-5 catalysts. Effect of SiO2/Al2O3 zeolite ratio. Catal Lett 18, 65–71 (1993). https://doi.org/10.1007/BF00769499
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00769499