Preparation of NiMoS nanoparticles for hydrotreating

Scott, Carlos E.; Pérez-Zurita, M.J.; Carbognani, Lante; Molero, Hebert; Vitale, Gerardo; Guzmán, Héctor J.; Pereira‐Almao, Pedro

doi:10.1016/j.cattod.2014.07.033

Cited by 56 publications

(25 citation statements)

References 29 publications

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“…[19][20][21][22][23] Routine analysis of heavy oils and vacuum residua 16,[19][20][21][22][23] and even pure asphaltenes 16 Figure 1 presents the protocol schematic for aliquots sampling, as well as views of the assembled rig. Experimental conditions for these tests have been recently published in greater detail.…”

Section: Introductionmentioning

confidence: 99%

Athabasca Bitumen In Situ Upgrading Reaction Monitoring: Operational Parameters versus Distillates Nature and Permanent Upgrading Achievable

et al. 2016

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Athabasca Bitumen upgrading via In Situ Combustion (ISC) and In Situ UpgradingTechnology (ISUT) was studied in the present work, addressing three aspects related to these processes: I. Monitoring techniques specially developed for getting distillation characteristics for products and their fractions, II. How distillation properties depend on process set up experimental conditions, III. Assess the permanent upgrading levels achieved for products from both studied processes. High temperature simulated distillation (HTSD) techniques were conceived for getting analysis turnarounds of 1-2 weeks, instead of month spans required when relying on standard physical distillation methodologies. Developed monitoring procedures guaranteed samples integrity, i.e., volatile fractions (<230ºC, about

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Section: Introductionmentioning

confidence: 99%

Athabasca Bitumen In Situ Upgrading Reaction Monitoring: Operational Parameters versus Distillates Nature and Permanent Upgrading Achievable

et al. 2016

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“…The observation of two doublets indicates that there are two different Mo-species. The Mo 3d 5/2 peak for the first set, at 228.92 eV, is assigned to MoS 2 (Mo 4+ ) species, and the other at 232.88 eV is attributed to Mo 6+ species [ 46 , 47 , 48 , 49 ] ( Table 2 ). The NiMoP reference catalyst without organic additive exhibited 70% of MoS 2 species.…”

Section: Resultsmentioning

confidence: 99%

Effect of 2,6-Bis-(1-hydroxy-1,1-diphenyl-methyl) Pyridine as Organic Additive in Sulfide NiMoP/γ-Al2O3 Catalyst for Hydrodesulfurization of Straight-Run Gas Oil

et al. 2017

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The effect of 2,6-bis-(1-hydroxy-1,1-diphenyl-methyl) pyridine (BDPHP) in the preparation of NiMoP/γ-Al2O3 catalysts have been investigated in the hydrodesulfurization (HDS) of straight-run gas oil. The γ-Al2O3 support was modified by surface impregnation of a solution of BDPHP to afford BDPHP/Ni molar ratios (0.5 and 1.0) in the final composition. The highest activity for NiMoP materials was found when the molar ratio of BDPHP/Ni was of 0.5. X-ray diffraction (XRD) results revealed that NiMoP (0.5) showed better dispersion of MoO3 than the NiMoP (1.0). Fourier transform infrared spectroscopy (FT-IR) results indicated that the organic additive interacts with the γ-Al2O3 surface and therefore discards the presence of Mo or Ni complexes. Raman spectroscopy suggested a high Raman ratio for the NiMoP (0.5) sample. The increment of the Mo=O species is related to a major availability of Mo species in the formation of MoS2. The temperature programmed reduction (TPR) results showed that the NiMoP (0.5) displayed moderate metal–support interaction. Likewise, X-ray photoelectron spectroscopy (XPS) exhibited higher sulfurization degree for NiMoP (0.5) compared with NiMoP (1.0). The increment of the MoO3 dispersion, the moderate metal–support interaction, the increase of sulfurization degree and the increment of Mo=O species provoked by the BDPHP incorporation resulted in a higher gas oil HDS activity.

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“…Recently, reverse microemulsion has been used to prepare NiMo catalysts by precipitation; after calcination and sulfidation, nickel was found decorating the edges of MoS 2 . However, after HDS reaction, a significant amount of nickel was segregated, provoking a low activity in comparison with a NiMo/γ-Al 2 O 3 catalyst taken as reference [15]. Reverse microemulsion is attractive to extend the actual studies to obtain CoMo/γ-Al 2 O 3 catalysts with active species as required for HDS, preparing structured nanoparticles in only one step.…”

Section: Introductionmentioning

confidence: 99%

CoMo/γ-Al2O3 Catalysts Prepared by Reverse Microemulsion: Synthesis and Characterization

Munguía-Guillén¹,

Reyes-Heredia²,

Picquart³

et al. 2018

Microemulsion - A Chemical Nanoreactor [Working Title]

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A series of CoMo/γ-Al 2 O 3 catalysts was synthesized by a reverse microemulsion method using 1-butanol as organic agent and cetyltrimethylammonium bromide as surfactant. The aqueous phase was used to form the solution of three corresponding Co, Mo and Al precursor salts. The materials were prepared at different solution concentrations in order to obtain different metal contents. All samples were characterized by X-ray diffraction, Raman spectroscopy, nuclear magnetic resonance and nitrogen physisorption. A chemical species distribution study was performed to establish conditions of preparation and the preponderant species present in solution as a function of pH. The materials obtained present high surface areas which decrease as the metal content (Co + Mo) increases. All samples with the exception of that with the highest metal content were amorphous as shown by X-ray diffraction. By Raman spectroscopy, MoO -Mo and MoO 2t species were observed in all calcined samples. MoO Co , Al-O-Mo, monomers and heteropolymolybdates were observed for the lower metal content samples, and the formation of CoMoO 4 and aluminum molybdate species for the higher metal contents. These results suggest that the materials with lower metal loading have species that are easily sulfidable and provide high activity in hydrodesulfurization reactions. A model for the interaction of the species in the aqueous phase of the micelle is presented.

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Preparation of NiMoS nanoparticles for hydrotreating

Cited by 56 publications

References 29 publications

Athabasca Bitumen In Situ Upgrading Reaction Monitoring: Operational Parameters versus Distillates Nature and Permanent Upgrading Achievable

Athabasca Bitumen In Situ Upgrading Reaction Monitoring: Operational Parameters versus Distillates Nature and Permanent Upgrading Achievable

Effect of 2,6-Bis-(1-hydroxy-1,1-diphenyl-methyl) Pyridine as Organic Additive in Sulfide NiMoP/γ-Al2O3 Catalyst for Hydrodesulfurization of Straight-Run Gas Oil

CoMo/γ-Al2O3 Catalysts Prepared by Reverse Microemulsion: Synthesis and Characterization

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