Preparation and evaluation of a well-ordered mesoporous nickel-molybdenum/silica opal hydrodesulfurization model catalyst

Zheng, Zhuo; Chen, Shengli; Hua, Ding; Zhang, Junhui

doi:10.1007/s11243-011-9552-5

Cited by 4 publications

(1 citation statement)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The WDUPS catalysts were prepared by first preparing the opal SiO 2 materials, then coating Al 2 O 3 on to the surface of the opal SiO 2 materials to switch the SiO 2 surface to Al 2 O 3 surface which is needed as the HDS catalyst supports, and finally supporting the HDS catalytically active components on to the Al 2 O 3 ‐modified SiO 2 opals . The opal SiO 2 materials were prepared by self‐assembly of monodisperse silica spheres, which were prepared through hydrolysis and condensation of tetraethyl orthosilicate in alcohol and in the presence of water and ammonia.…”

Section: Methodsmentioning

confidence: 99%

Insight into the intraparticle diffusion of residue oil components in catalysts during hydrodesulfurization reaction

et al. 2014

Self Cite

View full text Add to dashboard Cite

in Wiley Online Library (wileyonlinelibrary.com)Well-defined and uniform pore structure catalysts were used to study the intraparticle diffusion of fractionated Saudi vacuum residue under hydrodesulfurization (HDS) reaction conditions. HDS rates of residue oil cuts with different molecular weights are determined as functions of pore size, temperature, and pressure in a trickle-bed reactor. Credible intrinsic and bulk diffusivities of organosulfur compounds in residue oil were obtained for the first time, from the apparent and intrinsic reaction kinetic constants. Intrinsic diffusivities ranged from 2 3 10 27 to 8 3 10 27 cm 2 /s for the residual oil molecules; diffusivity decreases with increasing molecular weight of the residual oil. The intrinsic diffusivity for molecular weights $1000 Daltons increases with pore size for pores <70 nm, but is nearly independent of pore size for pores >70 nm. The diffusivity dependences on pore size and molecular weight suggest that the onset of restricted diffusion occurs for ratios of molecular diameter to pore diameter of $0.04. Figure 5. Relationship between ln(C 0 /C t ) and SHSV 21for Sa-14# narrow cut over catalyst with particle sizes of 0.128 and 0.675 mm, respectively.

show abstract

Section: Methodsmentioning

confidence: 99%

Insight into the intraparticle diffusion of residue oil components in catalysts during hydrodesulfurization reaction

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

Catalyst particle shapes and pore structure engineering for hydrodesulfurization and hydrodenitrogenation reactions

Shi

Zhao

Yang

et al. 2022

Front. Chem. Sci. Eng.

View full text Add to dashboard Cite

The surface properties of aluminated meso–macroporous silica and its catalytic performance as hydrodesulfurization catalyst support

et al. 2017

Self Cite

View full text Add to dashboard Cite

Aluminated mesoporous silica was prepared by multiple post-grafting of alumina onto uniform mesoporous SiO 2 , which was assembled from monodisperse SiO 2 microspheres. Hydrodesulfurization (HDS) catalyst was prepared by loading Ni and Mo active components onto the aluminated uniform mesoporous SiO 2 , and its HDS catalytic performance was evaluated using hydrodesulfurization of dibenzothiophene as the probe reaction at 300°C and 6.0 MPa in a tubular reactor. The samples were characterized by N 2 physisorption, scanning electronic microscopy, Fourier transform infrared spectrum, X-ray diffraction (XRD), temperature-programmed desorption of ammonia (NH 3 -TPD), 27 Al nuclear magnetic resonance ( 27 Al-NMR) and high-resolution transmission electron microscopy (HRTEM). The results showed that the Si-OH group content of SiO 2 was mainly dependent on the pretreatment conditions and had significant influence on the activity of the NiMo catalyst. The surface properties of the aluminated SiO 2 varied with the Al 2 O 3 -grafting cycles. Generally after four cycles of grafting, the aluminated SiO 2 behaved like amorphous alumina. In addition, plotting of activity of NiMo catalysts supported on aluminated mesomacroporous silica materials against the Al 2 O 3 -grafting cycle yields a volcano curve.

show abstract

Preparation and evaluation of a well-ordered mesoporous nickel-molybdenum/silica opal hydrodesulfurization model catalyst

Cited by 4 publications

References 25 publications

Insight into the intraparticle diffusion of residue oil components in catalysts during hydrodesulfurization reaction

Insight into the intraparticle diffusion of residue oil components in catalysts during hydrodesulfurization reaction

Catalyst particle shapes and pore structure engineering for hydrodesulfurization and hydrodenitrogenation reactions

The surface properties of aluminated meso–macroporous silica and its catalytic performance as hydrodesulfurization catalyst support

Contact Info

Product

Resources

About