Highly active MoS2 on wide-pore ZrO2–TiO2 mixed oxides

Barrera, María C.; Viniegra, M.; Escobar, José; Vrinat, M.; Reyes, J.A. de los; Murrieta, Florentino; García, José Ricardo Palomares

doi:10.1016/j.cattod.2004.07.027

Cited by 70 publications

(33 citation statements)

References 35 publications

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“…corresponding Mo 3d doublet (Fig. 3a) could be satisfactorily fitted by considering Mo 4+ (from MoS 2 ), Mo 5+ (from molybdenum oxy-sulfides) and Mo 6+ (unreduced molybdenum) [7]. From total surface Mo measurement, the Mo 4+ fraction was increased by a factor of two on ns-T, as compared to that found in the commercial reference ( Fig.…”

Section: Materials Characterizationmentioning

confidence: 85%

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Highly active sulfided CoMo catalyst on nano-structured TiO2

et al. 2005

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Section: Materials Characterizationmentioning

confidence: 85%

“…Several strategies have been attempted to circumvent these disadvantages. Al 2 O 3 -TiO 2 [4,5] and ZrO 2 -TiO 2 [6,7] mixed oxides have been synthesized offering promising results in both hydrodesulfurization and aromatics hydrogenation reactions.…”

Section: Introductionmentioning

confidence: 99%

Highly active sulfided CoMo catalyst on nano-structured TiO2

et al. 2005

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“…MCM-41 [9,10], zeolite [11] and mixed oxide [12] have been studied as potential supporting materials for the HDS catalyst in order to improve the surface area and porosity and to modify the surface acidity. In particular, the surface acidity of the catalyst affects the isomerization of the alkylsubstituted refractory sulfur compounds and eventually the HDS activity.…”

Section: Introductionmentioning

confidence: 99%

Development of Highly Active Co(Ni)Mo Catalysts for the Hydrodesulfurization of Dibenzothiophene Compounds

Cho

Moon

2010

Catal Surv Asia

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Co-or Ni-promoted Mo sulfide catalysts were prepared by combining three methods, sonochemical synthesis of Mo sulfides, promoter addition by chemical vapor deposition (CVD), and fluorination of alumina support, to improve their performance in the hydrodesulfurization (HDS) process. Sonochemically synthesized Mo sulfides exhibited higher HDS activity, particularly for the hydrogenation (HYD) of dibenzothiophene (DBT) compounds, than in the case of the catalysts prepared by impregnation due to the improved dispersion of the Mo species. The addition of Co or Ni to the catalyst by a CVD method allowed the selective decoration of the Mo-sulfide surface with the promoter and accordingly produced greater amounts of the Co-Mo-S and Ni-Mo-S phases, which are known to be active sites for HDS. The performance of catalysts prepared by combining sonochemical and CVD methods was further improved by the addition of fluorine, which generated Brönsted acid sites that were responsible for the HYD route and also for the migration of methyl groups in 4,6-dimethyldibenzothiophene (4,6-DMDBT).

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“…Among these approaches, support modification is an important one [2,3]. Wide variety of materials such as zeolites [4,5], Oxides such as SiO 2 [6], TiO 2 [7,8], ZrO 2 [9][10][11][12], Carbon [13] and mesoporous materials like mesoporous alumina [14], hexagonal mesoporous silica [15], MCM-41 [16][17][18], SBA-15 [19,20], KIT-6 [21], FSM-16 [22], mesoporous carbon [23] have been studied as supports for hydrotreating catalysts.…”

Section: Introductionmentioning

confidence: 99%

Influence of Frame Connectivity of SBA-15 and KIT-6 Supported NiMo Catalysts for Hydrotreating of Gas Oil

et al. 2010

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The feasibility of mesoporous silica as support to NiMo catalysts for hydrotreating of gas oil derived from Athabasca bitumen was tested in a trickle bed reactor at industrial conditions. High quality two dimensional (2D) hexagonal SBA-15 and three dimensional (3D) cubic KIT-6 supports were prepared by sol-gel method. The supports and catalysts were characterized by different characterization techniques such as N 2 physisorption, X-ray diffraction (XRD), Temperature programmed reduction (TPR), and DRIFT spectroscopy. The XRD and N 2 adsorption-desorption analysis shows the stability of structure after metal loadings. Presence of high NiMoS centres which is responsible for higher hydrotreating activities in KIT-6 supported catalysts is demonstrated by DRIFT spectroscopic analysis. HDN and HDS activities of NiMo catalysts supported on SBA-15 and KIT-6 were studied using coker light gas oil at temperature, pressure and LHSV of 370°C, 8.8 MPa and 2.0 h -1 , respectively. KIT-6 supported catalysts shows much higher hydrodesulfurization (HDS) and Hydrodenitrogenation(HDN) activities compared to SBA-15 counterpart due to the fact that 3D-interconnected mesopores caused better dispersion of active species and faster diffusion of reactants and products.

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Highly active MoS2 on wide-pore ZrO2–TiO2 mixed oxides

Cited by 70 publications

References 35 publications

Highly active sulfided CoMo catalyst on nano-structured TiO2

Highly active sulfided CoMo catalyst on nano-structured TiO2

Development of Highly Active Co(Ni)Mo Catalysts for the Hydrodesulfurization of Dibenzothiophene Compounds

Influence of Frame Connectivity of SBA-15 and KIT-6 Supported NiMo Catalysts for Hydrotreating of Gas Oil

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