Abstract
The influence of water on alumina-supported cobalt catalysts has been studied. The deactivation of supported Co catalysts was studied in a fixed-bed reactor using synthesis gas feeds containing different concentrations of water vapour. Supporting model studies were carried out using H2O/H2 feeds in conjunction with XPS and gravimetry. Rapid deactivation occurs on Re-promoted CO/Al2O3 catalysts when H2/CO/H2O feeds are used, whereas unpromoted CO/Al2O3 shows more stable activity. The results from the gravimetric studies suggest that only a small fraction of the bulk cobalt metal initially present reoxidizes to cobalt oxide during reaction. However, the XPS results indicate significant reoxidation of surface cobalt atoms or highly dispersed cobalt phases, which is likely to be the cause of the observed deactivation. Rhenium is shown to have a marked effect on the extent of reoxidation of alumina-supported cobalt catalysts.
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M.M.G. Senden, S.T. Sie, M.F.M. Post and J. Ansorge, in:Chemical Reactor Technology for Environmentally Safe Reactors and Products, eds. H.I. de Lasa, G. Dogu and A. Ravella (Kluwer, Dordrecht, 1992) p. 227.
J.M. Hochman, G.C. Lahn, R.F. Bauman and B. Eisenberg, in:Eurogas '92, Proc. European Applied Research Conf. on Natural Gas, eds. A. Holmen, B.F. Magnussen and F. Steineke (Trondheim, 1992) A125.
J.M. Fox, Catal. Rev. Sci. Eng. 35 (1993) 169.
M.E. Dry, Catal. Lett. 7 (1990) 241.
P.E. Højlund-Nielsen and J. Bøgild-Hansen, J. Mol. Catal. 17 (1982) 183.
R.B. Anderson, in:Catalysis, Vol. IV, ed. P.H. Emmett (Rheinhold, New York, 1956).
F.M. Gottschalk, R.G. Copperthwaite, M. van der Riet and G.J. Hutchings, Appl. Catal. 38 (1988) 103.
A. Hoff, E. Blekkan, A. Holmen and D. Schanke,Proc. 10th Int. Congr. Catal. (1992) p. 2067.
D. Schanke, S. Vada, E.A. Blekkan, A.-M. Hilmen, A. Hoff and A. Holmen, J. Catal., accepted.
S. Vada, A. Hoff, E. Adnanes, D. Schanke and A. Holmen, Topics in Catalysis 2 (1995) 155.
S. Eri, J.G. Goodwin Jr., G. Marcelin and T. Riis, US Patent 4,880,763 to Statoil (1989).
L. Guczi, T. Hoffer, Z. Zsoldos, S. Zyade, G. Maire and F. Garin, J. Phys. Chem. 95 (1991) 802.
L. Bruce, M. Hoang, A.E. Hughes and T.W. Turney, Appl. Catal. A 100 (1993) 51.
E. Iglesia, S.L. Soled, R.A. Fiato and G.H. Via, J. Catal. 143 (1993) 345.
A. Holmen, D. Schanke and G. Sundmark, Appl. Catal. 50 (1989) 211.
C.J. Kim, US Patent 5,227,407 to Exxon Res. Eng. Co. (1993).
C.N. Satterfield, R.T. Hanlon, S.E. Tung, Z.-M. Zou and G.C. Papaefthymiou, Ind. Eng. Chem. Prod. Res. Dev. 25 (1986) 407.
A. Lapidus, A. Krylova, V. Kazanskii, V. Borovkov, A. Zaitsev, J. Rathousky, A. Zukal and M. Jancalkova, Appl. Catal. 73 (1991) 65.
F.P.J.M. Kerkhof and J.A. Moulijn, J. Phys. Chem. 83 (1979) 1612.
M.A. Stranick, M. Houalla and D.M. Hercules, J. Catal. 103 (1987) 151.
P. Arnoldy and J.A. Moulijn, J. Catal. 93 (1985) 38.
H.-C. Tung, C.-T. Yeh and C.-T. Hong, J. Catal. 122 (1990) 211.
W.-J. Wang and Y.-W. Chen, Appl. Catal. 77 (1991) 223.
Y. Okamoto, T. Adachi, K. Nagata, M. Odawara and T. Imanaka, Appl. Catal. 73 (1991) 249.
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Schanke, D., Hilmen, A.M., Bergene, E. et al. Study of the deactivation mechanism of Al2O3-supported cobalt Fischer-Tropsch catalysts. Catal Lett 34, 269–284 (1995). https://doi.org/10.1007/BF00806876
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DOI: https://doi.org/10.1007/BF00806876