Abstract
The conversion of C3-C9 paraffins to small olefins over ZSM-5 zeolite is investigated. The small olefins are primary products and are usually converted into other more stable secondary products such as aromatics on the ZSM-5 zeolites. Thermally treated HZSM-5, K/HZSM-5 and Ba/HZSM-5 catalysts were developed and favourable oxidative conditions were introduced for the conversion process to maximize selective conversion of light paraffins to small olefins at the relatively low temperature of 873 K. The role of K and Ba is to minimize bimolecular hydrogen transfer reactions and enhance the dehydrogenation activity of the catalysts. Meanwhile, the oxygen in the gas phase is effective to improve the olefin selectivity and yield. C2-C4 olefin selectivities of 70.4 and 66.8% have been obtained for propane andn-hexane feed-stocks, respectively, at a temperature of 873 K.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
L.F. Albright, B.L. Crynes and W.H. Concoran,Pyrolysis Theory and Industrial Practice (Academic Press, New York, 1983) p. 319.
J. Wrisberg, K.J. Andersen and E. Mogensen, US Patent 3 725 495 (1973).
K.J. Andersen, F. Fisher, J. Rostrup Nielsen and J. Wrisberg, US Patent 3 872 179 (1975).
A. J. Kolombos, D. McNeice and D.C. Wood, US Patents 4087 350 (1978), 4 111 793 (1978).
M. Senes, P. Lhonore and J. Quibel, US Patent 3 644 557 (1972).
T. Tomita, K. Kikuchi and T. Sakamoto, US Patent 3 767 567 (1973).
T. Tomita, M. Node, Y. Yamaguchi and K. Uwano, US Patent 3 969 542 (1976).
K. Kikuchi, T. Tomita, T. Sakamoto and T. Ishida, Chem. Eng. Prog. 6 (1985) 54.
A.A. Lemonidou and I.A. Vasalos, Appl. Catal. 54 (1989) 119.
G. Pop, G. Ivanus, S. Boteanu, P. Tomi and E. Pop, US Patent 4 172 816 (1979).
F.N. Guerzoni and J. Abbot, J. Catal. 139 (1993) 289.
J.R. Mowry, R.F. Anderson and J.A. Johnson, Oil Gas J. (2 Dec. 1985).
A. Kogelbauer and J.A. Lercher, J. Catal. 125 (1990) 197.
R. Shigeishi, A. Garforth, I. Harris and J. Dwyer, J. Catal. 130 (1991) 423.
E.A. Lombardo and W.K. Hall, J. Catal. 112 (1988) 565.
P.B. Weisz, Chem. Technol. 3 (1973) 498.
B.C. Gates, J.R. Katzer and G.C.A. Schuit,Chemistry of Catalytic Processes (1979) p. 39.
D.P. Matthews and L.V.C. Rees, Chem. Age India 37 (1986) 353.
C.P. Nicolaides, M. Wapiennik, K.I.G. Weiss, H. van den Akker, B. van Zalk and P. Wielaard, J. Catal. 68 (1991) 31.
W.-C. Cheng and K. Rajagopalan, J. Catal. 119 (1989) 354.
C. Franco Parra, M.R. Goldwasser, F. Fajula and F. Figuerras, Appl. Catal. 17 (1985) 217.
R.L. Espino and M.B. Sherwin, Catalytic cracking for max. olefins, Petrochemical Development 72, p. 99.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Wang, L., Xie, M. & Tao, L. Conversion of light paraffins for preparing small olefins over ZSM-5 zeolites. Catal Lett 28, 61–68 (1994). https://doi.org/10.1007/BF00812470
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00812470