Abstract
The effect of activation conditions and the hydrodesulfurization (HDS) process on the structure of Ru/MgF2 prepared from RuCl3⋅nH2O precursor catalysts was studied. During the first 6-7 h of the HDS process significant differences in activities were detected between samples pretreated in 50% H2S/H2 and in 50% H2S/He. During this transient time, the Ru/MgF2 catalyst pretreated in 50% H2S/H2 increased in activity while the activity of that pretreated in H2S/He decreased. XRD, TPR and quantitative analysis of sulfur content revealed that directly after activation in H2S/He crystalline ruthenium sulfide is the main component of the surface, whereas after activation in H2S/H2 both RuS2 and metallic Ru are present on the surface. These differences decrease during the thiophene HDS process. Despite the different pretreatment conditions, the composition of the surface tends to “equilibrate”, which results in similar activity after prolonged reaction time.
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T. A. Pecoraro and R. R. Chianelli, J. Catal. 67 (1981) 430.
T. G. Harvey and T. W. Matheson, J. Catal. 101 (1986) 253.
V. Kougionas, M. Cattenot, J. L. Zotin, J. L. Portefaix and M. Breysse, Appl. Catal. A: General 124 (1995) 153.
A. P. Raje, S.-J. Liaw, R. Srinivasan and B. H. Davis, Appl. Catal. A: General 150 (1997) 297.
A. P. Raje, S.-J. Liaw and B. H. Davis, Appl. Catal. A: General 150 (1997) 319.
M. J. Ledoux, O. Michaux, G. Agostini and P. Panissod, J. Catal. 102 (1986) 275.
M. Nagai, K. Koizumi and S. Omi, Catal. Today 35 (1997) 393.
M. Wojciechowska, M. Pietrowski and S. Lomnicki, Chem. Commun. (1999) 463.
M. Wojciechowska, M. Pietrowski and B. Czajka, Catal. Today 65 (2001) 349.
M. Wojciechowska, M. Zielinski and M. Pietrowski, J. Fluorine Chem. (in press).
K. S. W. Sing, D. H. Everett, R. A. W. Haul, L. Moscou, R. A. Pierotti, J. Rouquerol and T. Siemieniewska, Pure Appl. Chem. 57 (1985) 603.
K. Hara, K. Sayama and H. Arakawa, Appl. Catal. A189 (1999) 127.
G. Berhault, M. Lacroix, M. Breysse, F. Mauge, J.-C. Lavalley and L. Qu, J. Catal. 170 (1997) 37.
M. Sugioka, F. Sado, Y. Matsumoto and N. Maesaki, Catal. Today 29 (1996) 255.
J. A. De Los Reyes, S. Gobolos, M. Vrinat and M. Breysse, Catal. Lett. 5 (1990) 17.
B. Moraweck, G. Bergeret, M. Cattenot, V. Kougionas, C. Geantet, J.-L. Portefaix, J. L. Zotin and M. Breysse, J. Catal. 165 (1997) 45.
P. J. Mangnus, A. Riezebos, A. D. van Langeveld and J. A. Moulijn, J. Catal. 151 (1995) 178.
Y.-J. Kuo and B. J. Tatarchuk, in: 9th Int. Congress on Catalysis, Calgary, 1988, Vol. 1, eds. M. J. Phillips and M. Ternan, p. 96.
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Wojciechowska, M., Pietrowski, M., Czajka, B. et al. Influence of Activation and the HDS Reaction on the Structure of Magnesium Fluoride-Supported Ru Catalysts Derived from Ruthenium Chloride Hydrate. Catalysis Letters 87, 153–157 (2003). https://doi.org/10.1023/A:1023491105991
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DOI: https://doi.org/10.1023/A:1023491105991