Effect of the modified support γ-Al2O3-CaO on the structure and hydrodesulfurization activity of Mo and Ni-Mo catalysts

Andonova, Stanislava; Vladov, Ch.; Pawelec, B.; Shtereva, Iskra; Tyuliev, G.; Damyanova, S.; Petrov, L.

doi:10.1016/j.apcata.2007.06.009

Cited by 26 publications

(14 citation statements)

References 44 publications

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“…Other modifiers, in particular, Ga [8,21] and Ca [22] similarly affect the catalyst when deposited on Al 2 O 3 . It is shown that the use of Ga 2 О 3 as a modifier reduces the formation of Ni(Co) spinels, reduces the number of MoS 2 bonds with the support.…”

Section: Resultsmentioning

confidence: 99%

“…It is shown that the use of Ga 2 О 3 as a modifier reduces the formation of Ni(Co) spinels, reduces the number of MoS 2 bonds with the support. Introduction of CaO [22] also makes it possible to reduce the bond strength of MoO 3 with the support and prevent the for mation of Al 2 (MoO 4 ) 3 . The catalysts prepared with the use of GaO-Al 2 O 3 or CaO-Al 2 O 3 as a support showed a higher activity in HDS reactions.…”

Section: Resultsmentioning

confidence: 99%

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Hydrogenolysis of dibenzothiophene on zinc-modified NiMoW/Al2O3 hydrotreating catalysts

et al. 2015

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The effect of the introduction of ZnO into the NiMoW/Al 2 O 3 hydrotreating catalyst on its activity in dibenzothiophene (DBT) hydrogenolysis has been studied. To select the optimal method for introducing the modifier, a series of samples has been prepared with ZnO added at different stages of the catalyst synthesis. Before the test, the catalysts were sulfided. The catalysts have been tested in the dibenzothiophene hydro genolysis reaction was under hydrogen pressure using a continuous flow microreactor. The interrelation of the active phase morphology, as well as the route of addition and amount of the added modifier with the cat alytic activity of the samples has been revealed. Modification of the support by adding ZnO in an amount of 0.5 wt % increases the activity of the catalyst in DBT hydrogenolysis.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Hydrogenolysis of dibenzothiophene on zinc-modified NiMoW/Al2O3 hydrotreating catalysts

et al. 2015

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“…As the requirements for sulfur level in transportation fuels become increasingly strict, the NiMo catalysts have been recently a subject of numerous investigations e.g. [2][3][4][5]. Research into deposition of the active metals over shaped form of c-Al 2 O 3 support, however, has been reported only scarcely.…”

Section: Introductionmentioning

confidence: 98%

Deposition of NiO onto MoO3/γ-Al2O3 extrudates by slurry impregnation method

Kaluža

Zdražil

Vı́t

2009

React Kinet Catal Lett

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NiO-MoO 3 /c-Al 2 O 3 catalysts were prepared by the reaction of c-Al 2 O 3 extrudates with an aqueous slurry of MoO 3 , followed by the reaction of the MoO 3 /cAl 2 O 3 catalyst with an aqueous slurry of NiO, Ni(OH) 2 , NiCO 3 Á2Ni(OH) 2 ÁxH 2 O, or 2NiCO 3 Á3Ni(OH) 2 Á4H 2 O and by subsequent drying. The NiO deposition was examined with electron probe microanalysis. The deposited Ni efficiently increased the activity in benzothiophene hydrodesulfurization.

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“…Carbon, mesoporous clays, aluminosilicates, zeolites, and alumina can expose more of the active edge sites for reaction with sulfur-containing molecules (Li, 2004). However, owing primarily to its attractive mechanical properties and adjustable surface properties, alumina is the most commonly used support for HDS catalysts Al-Zeghayer et al, 2005;Andonova et al, 2007;Farag, 2007). While the small surface area and particularly intra-diffusion properties will be critical for its use in the coming HDS processes.…”

Section: Introductionmentioning

confidence: 99%

Macro-pore Volume Mesoporous Alumina: A Promising Support for Mo-Ni-P Catalyst in Hydrodesulfurization

Liu

Zhao

et al. 2014

Petroleum Science and Technology

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Macro-pore volume mesoporous alumina (MMA) synthesized by secondary nano-assembly method was applied as support for Mo-Ni-P catalyst. The samples were characterized by mercury intrusion method, XRD, TEM, and SEM. They displayed simultaneously enough active sites and particular larger pores structure. By taking advantage of these properties, Mo-Ni-P MMA catalyst bearing high active species dispersion, good reducibility, and enhanced diffusibility compared with a commercial catalyst. It is prospected that the obtained MMA had a good potential as support for HDS catalysts.

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Effect of the modified support γ-Al2O3-CaO on the structure and hydrodesulfurization activity of Mo and Ni-Mo catalysts

Cited by 26 publications

References 44 publications

Hydrogenolysis of dibenzothiophene on zinc-modified NiMoW/Al2O3 hydrotreating catalysts

Hydrogenolysis of dibenzothiophene on zinc-modified NiMoW/Al2O3 hydrotreating catalysts

Deposition of NiO onto MoO3/γ-Al2O3 extrudates by slurry impregnation method

Macro-pore Volume Mesoporous Alumina: A Promising Support for Mo-Ni-P Catalyst in Hydrodesulfurization

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