Abstract
Three series of Co/NaY, Mo/NaY and CoMo/NaY zeolite catalysts with variable metal content, prepared by a conventional impregnation method, were characterized by XRD, IR spectroscopy (oxide state) and acidity measurements (sulfide state), and tested in hydrodesulfurization (HDS) of gas oil at high pressure in the temperature range 275–350°C. The combined results of surface area, XRD and IR showed that in the catalysts with high metal loading a small loss in crystallinity and a partial blockage of the zeolite supercages were produced by Mo oxide species. The number of acid sites, which was lower for the Co/NaY than for the Mo/NaY catalysts, increased with increasing Co or Mo loading, but the strength of the acid sites was stronger for the Co/NaY series. HDS specific activities of the Co/NaY and Mo/NaY monometallic catalysts reached a maximum at very low loadings of Co (∼ 0.10 at. nm−2) or Mo (∼ 0.16 at. nm−2) by the double action of the metal sulfide species and the strong acid sites generated on the zeolite by the Co or Mo incorporation. In the binary CoMo/NaY catalysts, the synergy between Co and Mo species was significant for high Mo contents only.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
P.E. Dai and J.H. Lunsford, J. Catal. 64 (1980) 173.
R. Cid, F.J. Gil Llambías, J.L.G. Fierro, A. López Agudo and J. Villaseñor, J. Catal. 89 (1984) 478.
Y.-S. Yong and R.F. Howe, J. Chem. Soc. Faraday Trans. I 82 (1986) 2887.
N. Davidova, P. Kovacheva and D. Shopov, in: Proc. 7th Int. Zeolite Conf., eds. Y. Murakami, A. Lijima and J.W. Word (Kodansha/Elsevier, Tokyo/Amsterdam, 1986) p. 811.
J. Leglise, A. Janin, J.C. Lavalle and J.C. Cornet, J. Catal. 114 (1988) 388.
R. Cid, F. Orellana and A. López Agudo, Appl. Catal. 32 (1987) 327.
A. López Agudo, R. Cid, F. Orellana and J.L.G. Fierro, Polyhedron 5 (1986) 187.
A. López Agudo, A. Benítez, J.L.G. Fierro, J.M. Palacios, J. Neira and R. Cid, J. Chem. Soc. Faraday Trans. 88 (1992) 385.
M. Laniecki and W. Zmierczak, Zeolites 11 (1991) 18.
R. Cid, J.L.G. Fierro and A. López Agudo, Zeolites 10 (1990) 95.
S. Gobolos, M. Lacroix, T. Decamp, M. Vrinat and M. Breysse, Bull. Soc. Chim. Belg. 100 (1991) 907.
Q. Qusro and F.E. Massoth, Appl. Catal. 29 (1978) 375.
M.J. Ledoux, C.P. Huu, Y. Segura and F. Luck, J. Catal. 121 (1990) 70.
R. Cid and G. Pecchi, Appl. Catal. 14 (1985) 15.
H.G. Karge and J. Rasko, J. Colloid. Interf. Sci. 64 (1978) 522.
A. Ezzamarty, E. Catherine, D. Cornet, J.F. Hemidy, A. Janin, J.C. Lavalley, J. Leglise and P. Meriandeau, in:Zeolites: Facts, Figures, Future, Studies in Surface Science and Catalysis, Vol. 49, eds. P.A. Jacobs and R.A. van Santen (Elsevier, Amsterdam, 1989) p. 1025.
J. Bachelier, M.J. Tilliete, J.C. Duchet and D. Cornet, J. Catal. 76 (1982) 360.
V.H.J. de Beer, M.J.M. van der Aalst, C.J. Machiels and G.C.A. Schmit, J. Catal. 43 (1976) 78.
K.C. Pratt, J.V. Sanders and V. Christov, J. Catal. 124 (1990) 416.
Y. Okamoto, H. Tomioka, T. Imanaka and S. Teranishi, J. Catal. 30 (1980) 93.
R. Cid, J. Neira, J. Godoy, J.M. Palacios, S. Mendioroz and A. López Agudo, J. Catal. 141 (1993) 206.
J.C. Kim and S.I. Woo, Appl. Catal. 39 (1988) 107.
K.Y.S. Ng and E. Gulari, J. Catal. 95 (1985) 33.
J. Ramírez, S. Fuentes, G. Díaz, M. Vrinat, M. Breysse and M. Lacroix, Appl. Catal. 52 (1989) 211.
T.A. Egerton, A. Hagan, F.S. Stone and J.C. Vickerman, J. Chem. Soc. Faraday Trans. I 68 (1972) 723.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Cid, R., Gil Llambías, F.J., González, M. et al. Catalytic activity of Co, Mo and CoMo supported on NaY zeolite: hydrodesulfurization of gas oil at high pressure. Catal Lett 24, 147–157 (1994). https://doi.org/10.1007/BF00807385
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00807385