Carbon-supported tungsten and nickel catalysts for hydrodesulfurization and hydrogenation reactions

Pawelec, B.; Mariscal, R.; Fierro, J.L.G.; Greenwood, A. W.; Vasudevan, Palligarnai T.

doi:10.1016/s0926-860x(00)00605-0

Cited by 100 publications

(41 citation statements)

References 29 publications

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“…fluorine [2,3], phosphorus [4][5][6][7][8][9] or boron [10][11][12][13][14]. In addition, other active phases such as WS 2 [15][16][17][18][19], CrS x [20][21][22][23][24], noble metals [25][26][27][28][29][30][31][32][33][34][35][36][37], as well as other supports than alumina such as TiO 2 or mixed oxides [38][39][40][41][42][43][44][45][46][47][48] or carbon [49] and zeolites [50,51] were also investigated, giving a large pallet of a...…”

Section: Introductionmentioning

confidence: 99%

Description of coordinatively unsaturated sites regeneration over MoS2-based HDS catalysts using 35S experiments combined with computer simulations

Dumeignil

Paul²,

Veilly³

et al. 2005

Applied Catalysis A: General

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Section: Introductionmentioning

confidence: 99%

Description of coordinatively unsaturated sites regeneration over MoS2-based HDS catalysts using 35S experiments combined with computer simulations

Dumeignil

Paul²,

Veilly³

et al. 2005

Applied Catalysis A: General

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“…The performance of these CoMo-and NiMo-based catalysts can be improved by adding further elements such as fluorine 3) , phosphorus 4) or boron 4), 5) . The use of other active phases such as WS2 6) , CrSx 7), 8) , noble metals 9) 15) , as well as other carriers such as TiO2 or mixed oxides 16) 21) or carbon 22) and zeolites 23) has also been investigated. The sol-gel method enables the preparation of porous materials with fine structure and polycrystalline materials with uniform composition from more than one component at low temperature.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Alumina-supported Cobalt–molybdenum Catalysts by Sol-gel Method and Hydrodesulfurization Activities

石原

田中

愛葉

et al. 2015

J. Jpn. Petrol. Inst.

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Al2O3-supported Co and Mo catalysts were prepared by the sol-gel method, in which Co and/or Mo species were added at the hydrolysis of Al tri-s-butoxide. XRD patterns, N2 adsorption and desorption, amounts of NO adsorption and NO species by FT-IR were measured to characterize the catalysts. Catalysts with active components Co and Mo separately supported by the sol-gel method had higher activity for hydrodesulfurization of dibenzothiophene. Mo _ Co/Al2O3, in which Mo species was supported on Co/Al2O3 by the sol-gel method, showed the highest activities at lower temperature, indicating that the Co species was effectively dispersed on Al2O3 during the preparation of Co/Al2O3. Catalysts in which Co and Mo species were simultaneously supported had lower activity, indicating that both Co and Mo species were dispersed and reduced interaction between Co and Mo. Co _ Mo/sol-gelAl2O3, with the Co species supported on Mo/sol-gelAl2O3, showed the highest activity among sol-gelAl2O3 supported CoMo catalysts, indicating that the Mo species was effectively dispersed during the preparation of Mo/sol-gelAl2O3. Biphenyl was selectively obtained. NO adsorption measurement showed that the amount of NO adsorbed was almost same for Mo _ Co/Al2O3 sulfided once or twice. In contrast, sol-gel CoMo/Al2O3, with the Co and Mo added simultaneously by the sol-gel method, showed significant decrease in NO adsorption after second sulfiding, which would be related to the lower stability of sol-gelCoMo/Al2O3 prepared by the sol-gel method. Al2O3-supported Co _ Mo catalysts prepared using the sol-gel method had relatively high surface areas (282-544 m 2 /g) and relatively smaller pore sizes (3.7-6.3 nm).

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“…NiMoS or CoMoS-based catalyst performance can be improved by adding third elements such as fluorine 3),4) , phosphorus 5) 11) or boron 10) 17) . The use of other active phases such as WS2 18), 19) , CrSx 20) 24) , noble metals 20),22), 25) 35) , as well as other carriers such as TiO2 or mixed oxides 36) 55) or carbon 56) and zeolites 57), 58) has also been investigated. Titania carrier appears promising since the specifi c activity of MoS2/TiO2 catalysts for thiophene HDS was 4.4 times higher than that of MoS2/Al2O3 catalysts 36) .…”

Section: Introductionmentioning

confidence: 99%

γ-アルミナ担持および高表面積チタニア担持モリブデン，コバルト-モリブデン，ニッケル-モリブデン水素化脱硫触媒挙動の<sup>35</sup>Sトレーサー法に基づいた比較

篤

Dumeignil

一也

et al. 2007

J. Jpn. Petrol. Inst.

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The differences between MoS2, CoMoS and NiMoS HDS catalysts supported on γ-alumina and high SSA titania are investigated based on the results of [ 35 S]DBT HDS experiments. Previous studies of MoS2 and CoMoS are reviewed, discussed and compared with new results for NiMoS. Introduction of Ni or Co to MoS2/Al2O3 catalysts classically yields a signifi cant increase in HDS performance. Irrespective of the promoter, an increase in S0, the number of labile sulfur atoms, is observed. In contrast, kRE kRE k , the H2S liberation rate constant, plotted as a function of the Ni/Mo ratio, presents a volcano profi le on Ni-promoted catalysts, but kRE kRE k reaches a plateau from low Co/Mo ratios on Co-promoted catalysts. The TiMoS phase, which is formed in-situ during HDS on Mo/ TiO2 catalysts, promotes sulfur mobility and makes Mo/TiO2 catalysts more active than Mo/Al2O3 catalysts. Nevertheless, CoMo/TiO2 catalysts are less active than CoMo/Al2O3 catalysts because further promotion of TiMoS phase with Co might yield excessive weakening of the metal _ sulfur bonds, and/or some Co atoms might be lost in the TiO2 matrix without interacting with MoS2. In contrast, introduction of Ni to Mo/TiO2 catalysts yields significant increases in both kRE and S0. The NiMo/TiO2 catalysts exhibit HDS performances close to those of Al2O3-supported catalysts. Clearly catalytic behavior over Co-and Ni-promoted catalysts is different.

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Carbon-supported tungsten and nickel catalysts for hydrodesulfurization and hydrogenation reactions

Cited by 100 publications

References 29 publications

Description of coordinatively unsaturated sites regeneration over MoS2-based HDS catalysts using 35S experiments combined with computer simulations

Description of coordinatively unsaturated sites regeneration over MoS2-based HDS catalysts using 35S experiments combined with computer simulations

Preparation of Alumina-supported Cobalt–molybdenum Catalysts by Sol-gel Method and Hydrodesulfurization Activities

γ-アルミナ担持および高表面積チタニア担持モリブデン，コバルト-モリブデン，ニッケル-モリブデン水素化脱硫触媒挙動の<sup>35</sup>Sトレーサー法に基づいた比較

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