EFFECT OF FLUORINE IN THE SYNERGISM Co-Mo VIA HYDROGEN SPILLOVER ON THE HYDRODESUL-PHURIZATION OF REFRACTORY MOLECULES

Méndez‐Albores, Alia; Villarroel, M.; Camu, Esteban; Gil-Llambías, F.J.; Ávila, P.; Baeza, P.

doi:10.4067/s0717-97072013000400036

Cited by 2 publications

(2 citation statements)

References 29 publications

(70 reference statements)

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“…All these results are quite interesting, since there is much controversy in the literature regarding bimetallic catalysts [12]. It is demonstrated that when using samples of P(x)/c-Al 2 O 3 or F(x)/c-Al 2 O 3 with different phosphorus and fluoride contents [13,14] as the separator, the promotion factor is higher than when using c-Al 2 O 3 by itself, which proves that the phosphorus and the fluoride improve Hso migration by modifying the acidity of the alumina used as separator. Working with a feed containing exclusively resistant molecules, the conversion of these molecules has been studied in situ, through the use of gas chromatography with a sulphur-specific detector (GC-FPD), showing that Hso favours the HDS of this type of molecule [15].…”

Section: Introductionmentioning

confidence: 87%

Synergism of Extruded and Monolithic Co–Mo/γ-AL2O3–Sepiolite Catalytic Systems in the Hydrodesulphurization Reaction

et al. 2015

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This study evaluates the synergism of c-alumina supported cobalt-molybdenum samples prepared by impregnation in excess of solvent. These materials were then agglomerated with sepiolite in order to obtain samples of extruded cylinders and honeycomb monoliths shaped. The activity of the gas-oil hydrodesulphurization reaction was measured under reaction conditions similar to those used in industry, and the samples were characterised by using electron probe micro analysis and scanning electron microscopy. It was observed that catalytic activity and synergism are higher in both, the extruded and the monolithic samples, when both, the cobalt and molybdenum were impregnated on separate surfaces (Co//Mo), where it was also possible to observe synergism due to hydrogen spillover. The lowest level of activity observed in the extruded and monolithic bimetallic catalysts (CoMo) may be attributed to the cobalt covering the molybdenum active sites.

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Section: Introductionmentioning

confidence: 87%

Synergism of Extruded and Monolithic Co–Mo/γ-AL2O3–Sepiolite Catalytic Systems in the Hydrodesulphurization Reaction

et al. 2015

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“…Over the years, it has been studied how to improve the activity of HT catalysts, by incorporating different additives [14][15][16][17][18][19][20][21]. Similarly, in the case of adsorbent systems, different additives have been studied to improve adsorption capacity [6,22,23].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Adsorption of 4,6-Dimethyldibenzothiophene and Quinoline over Nickel and Boron Modified Gamma-Al2O3 Adsorbent

et al. 2020

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The simultaneous adsorption of quinoline and 4,6-dimethyldibenzothiophene over adsorbents, based on alumina modified with boron and nickel under ambient temperature and pressure, was studied. The adsorbents were characterized by BET specific surface area, a potentiometric method for the determination of acid strength, electrophoretic migration, and X-ray diffraction. The results showed that the adsorbent containing nickel had better adsorption capacity than the adsorbent modified with nickel and boron, which was attributed to its greater acidity and ability to generate π-complexation between the adsorbent and the molecules. In terms of selectivity, quinoline was more adsorbed than 4,6-dimethyldibenzothiophene in all systems, due to the basic nature of quinoline. The experimental data in all cases were adjusted by three kinetic models (Yoon–Nelson, Yan and Thomas), and the regression coefficients in all models were close to one. Finally, the values of the kinetic constant obtained by the Thomas model were used to relate the adsorption capacity results.

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EFFECT OF FLUORINE IN THE SYNERGISM Co-Mo VIA HYDROGEN SPILLOVER ON THE HYDRODESUL-PHURIZATION OF REFRACTORY MOLECULES

Cited by 2 publications

References 29 publications

Synergism of Extruded and Monolithic Co–Mo/γ-AL2O3–Sepiolite Catalytic Systems in the Hydrodesulphurization Reaction

Synergism of Extruded and Monolithic Co–Mo/γ-AL2O3–Sepiolite Catalytic Systems in the Hydrodesulphurization Reaction

Simultaneous Adsorption of 4,6-Dimethyldibenzothiophene and Quinoline over Nickel and Boron Modified Gamma-Al2O3 Adsorbent

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