Hydrodesulfurization of 4,6-dimethyldibenzothiophene over Pt supported on γ-Al2O3, SBA-15, and HZSM-5

Guo, Hongli; Sun, Yinyong; Prins, R.

doi:10.1016/j.cattod.2007.07.007

Cited by 29 publications

(14 citation statements)

References 22 publications

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“…In the same sense, it must be noticed that the Al 2 O 3 -SiO 2 support prepared has a very low Si/Al ratio (Si/Al = 0.1) which allows to think that it would not possess very strong acidic sites. This aspect is very important because highly acidic supports tend to favor undesirable side reactions during HDS [28] and are additionally more susceptible to poisoning from hydrodenitrogenation [29]. Finally, the data confirm the fact that Pd-Pt catalysts exhibit a balance of catalytic functions different from that displayed by conventional NiMo or CoMo catalysts.…”

Section: Resultssupporting

confidence: 54%

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

2009

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A silica-alumina supported Pd-Pt bimetallic catalyst was found to be highly active in dibenzothiophene hydrodesulfurization with preferential selectivity to the hydrogenation (HYD) route of desulfurization at the expense of the direct removal of sulfur. In addition, it was demonstrated that for Pd-Pt catalysts selectivity to HYD can be drastically changed by a ''soft'' change in the nature of the carrier.

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Section: Resultssupporting

confidence: 54%

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

2009

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“…Han et al reported unsupported Pt nanowires with uniform dia meter of 7.0 nm using SBA-15 [46]. Pt-SBA-15 is also used as an active catalyst for hydrodesulfurization of 4,6-dimethyldibenzothiophone [47] and ethylene hydrogenation [48]. Selective catalytic reduction of nitric oxide was reported by Oh et al using Pt-loaded Al-SBA-15 [49].…”

Section: Two-dimensional Hexagonal Mesoporous Silcamentioning

confidence: 93%

Highly dispersed platinum nanoparticles on mesoporous materials

Srinivasu

2010

Pure and Applied Chemistry

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The high surface area and controlled pore size of mesoporous materials made them efficient support for the dispersion of nanoparticles. In particular, highly dispersed Pt-loaded mesoporous materials are interesting systems for nanotechnology and catalysis. The structural, textural, and surface properties of a mesoporous support play a critical role in nanoparticle synthesis. This article presents the development of dispersion of nanoparticles on mesoporous supported materials such as MCM-41, SBA-15, KIT-6, and CMK-3 and their properties. Future research trends toward new approaches to designing Pt nanoparticles for electrochemical applications are proposed.

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“…The most important industrial catalysts for HDS are commonly composed of Mo(W) and Co(Ni) sulfides supported on a highly porous γ-Al 2 O 3 5 . Catalytic supports such as mesoporous materials, zeolites 6 , 7 , carbon 8 , clays 9 have also been studied. The support is very important for the catalyst properties, as it can affect its aging, deactivation, regeneration, reducibility, ease of sulphidation and catalytic recovery 10 .…”

Section: Introductionmentioning

confidence: 99%

Mutual inhibition effect of sulfur compounds in the hydrodesulfurization of thiophene, 2-ethylthiophene and benzothiophene ternary mixture

Călin

Leoștean

Trifoi

et al. 2021

Sci Rep

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The hydrodesulphurization of a model component and equimolar ternary mixture of thiophene, 2-ethylthiophene and benzothiophene over sulphided CoMo/γ-Al2O3 and CoMo/γ-Al2O3-Nb2O5 catalysts were investigated in a fixed bed flow reactor. The catalysts were prepared by incipient wetness impregnation method and characterized by textural characteristics, total acidity and chemical species present on the catalysts surface. The characterization results showed that both CoMo/γ-Al2O3-Nb2O5 and sulphided CoMo/γ-Al2O3 catalysts exhibit a mesoporous structure with cylindrical pores open at both ends, evidenced by the IV type adsorption–desorption isotherm with a H1 hysteresis loop and have an average pore diameter between 3 and 4 nm. The chemical species present on the catalysts surface evaluated by XPS indicated that Co2+ and Mo4+ species are present in the sulfide form on both catalysts surfaces. In addition, there are also found oxidic species arising from incomplete reduction and sulphidation. The presence of niobium oxide in the catalytic support had a positive effect in leading to higher specific surface area (170 m2/g) and total acidity (0.421 meq/g) compared with CoMo/γ-Al2O3 catalyst (140 m2/g and 0.283 meq/g) respectively. The evaluation results from the hydrodesulfurization showed that CoMo/γ-Al2O3-Nb2O5 catalyst had a higher activity in hydrodesulphurization process of thiophene, 2-ethylthiophene and benzothiophene. The CoMo/γ-Al2O3-Nb2O5 catalyst eliminated sulfur from the single component feed (corresponding to 2380 ppm S) and reduced below 10 ppm, for the feed consisting in the equimolar ternary mixture of thiophene, 2-ethylthiophene and benzothiophene (2380 ppm S). The reactivity of thiophen compounds was reduced due to competitive adsorption. It was observed that benzothiophene inhibits the transformation of thiophene and 2-ethylthiophene. A mutual inhibition effect between sulfur compounds was also observed when thiophene, 2-ethylthiophene and benzothiophene were combined and tested over the CoMo/γ-Al2O3 catalyst. The inhibition effect had a lower intensity by introducing Nb2O5 in the catalyst support.

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Hydrodesulfurization of 4,6-dimethyldibenzothiophene over Pt supported on γ-Al2O3, SBA-15, and HZSM-5

Cited by 29 publications

References 22 publications

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

Highly HYD Selective Pd–Pt/support Hydrotreating Catalysts for the High Pressure Desulfurization of DBT Type Molecules

Highly dispersed platinum nanoparticles on mesoporous materials

Mutual inhibition effect of sulfur compounds in the hydrodesulfurization of thiophene, 2-ethylthiophene and benzothiophene ternary mixture

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