Heptamolybdate-intercalated CoMgAl hydrotalcites as precursors for HDS-selective hydrotreating catalysts

Coelho, Tiago L.; Licea, Yordy E.; Palacio, Luz Amparo; Faro, Arnaldo C.

doi:10.1016/j.cattod.2014.06.016

Cited by 23 publications

(11 citation statements)

References 52 publications

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“…In the case of catalysts prepared through synthesis by template-free method of an oxide catalysts and followed by thermal sulfidation process, we focused the discussion on three synthesis procedures as follows: (i) layered double hydroxides [144][145][146][147]; (ii) hydrothermal method [148][149][150][151]; and (iii) precipitation method [152,153]. Layered double hydroxides (LDH) are used as precursors and structural templates as well for the synthesis of HDS catalysts [147].…”

Section: Template-free Methodsmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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The literature from the past few years dealing with hydrodesulfurization catalysts to deeply remove the sulfur-containing compounds in fuels is reviewed in this communication. We focus on the typical transition metal sulfides (TMS) Ni/Co-promoted Mo, W-based bi- and tri-metallic catalysts for selective removal of sulfur from typical refractory compounds. This review is separated into three very specific topics of the catalysts to produce ultra-low sulfur diesel. The first issue is the supported catalysts; the second, the self-supported or unsupported catalysts and finally, a brief discussion about the theoretical studies. We also inspect some details about the effect of support, the use of organic and inorganic additives and aspects related to the preparation of unsupported catalysts. We discuss some hot topics and details of the unsupported catalyst preparation that could influence the sulfur removal capacity of specific systems. Parameters such as surface acidity, dispersion, morphological changes of the active phases, and the promotion effect are the common factors discussed in the vast majority of present-day research. We conclude from this review that hydrodesulfurization performance of TMS catalysts supported or unsupported may be improved by using new methodologies, both experimental and theoretical, to fulfill the societal needs of ultra-low sulfur fuels, which more stringent future regulations will require.

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Section: Template-free Methodsmentioning

confidence: 99%

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

et al. 2019

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“…In parallel to the development of new methods for zeolite synthesis, suitable alternatives have been explored for the production of other porous materials (LDHs, aluminas) for use as catalysts in petrochemical and chemical industries . Layered double hydroxides (LDHs) are one of the promising materials, which can be used as catalyst‐precursor in numerous reactions …”

Section: Bio‐sourced Secondary Templates (Bsst): Sugar Cane Bagasse Amentioning

confidence: 99%

Biomass‐assisted Zeolite Syntheses as a Tool for Designing New Acid Catalysts

et al. 2017

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The aim of this Concept article is to highlight different aspects of using biomass residues or extracted molecules in the synthesis of zeolites (mainly), aluminas and layered doubled hydroxides (LDHs). The strategies presented should serve as a basis for rationally preparing those aforementioned materials for catalytic purposes. Indeed, the presence of sugars, lignin, lignocellulosic biomass usually induces morphological/textural changes as well as (in some cases) modified chemical composition and surface properties.

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“…CoMgMoAl catalysts drived from CoMgAl-terephthalate LDHs both enhanced the thiophene HDS and cyclohexene hydrogenation activities along with the increasing Mg content [12]. Nevertheless, research on development of a Zn/Mg-modified layered precursor for HDS is rare.…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

“…The higher HDS activity is attributed to the promoter effect of Zn, since Zn decreases the interaction between alumina and active components (Ni, Mo, and W) that forms Ni(Zn)-Mo(W)-S active species. CoMgMoAl catalysts drived from CoMgAl-terephthalate LDHs both enhanced the thiophene HDS and cyclohexene hydrogenation activities along with the increasing Mg content [12]. Nevertheless, research on development of a Zn/Mg-modified layered precursor for HDS is rare.…”

Section: Introductionmentioning

confidence: 99%

High Active Zn/Mg-Modified Ni–P/Al2O3 Catalysts Derived from ZnMgNiAl Layered Double Hydroxides for Hydrodesulfurization of Dibenzothiophene

et al. 2017

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A series of ZnMgNiAl layered double hydroxides (LDHs) containing 20 wt.% Ni and different Zn/Mg molar ratios were prepared by a coprecipitation method, and then were introduced with H 2 PO 4 − via a microwave-hydrothermal method. With the resulting mixtures as the precursors, Zn/Mg-modified ZnMgNi-P/Al 2 O 3 catalysts were prepared. The Zn/Mg molar ratio affected the formation of Ni 2 P and Ni 12 P 5 in nickel phosphides. The ZnMgNi-P/Al 2 O 3 catalyst with a Zn/Mg molar ratio of 3:1 exhibits the best dibenzothiophene hydrodesulfurization (HDS) activity. Compared with the Ni-P/Al 2 O 3 catalyst prepared from the impregnation method, the ZnMgNi-P/Al 2 O 3 catalyst shows a higher HDS activity (81.6% vs. 54.3%) and promotes the direct desulfurization of dibenzothiophene.

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Heptamolybdate-intercalated CoMgAl hydrotalcites as precursors for HDS-selective hydrotreating catalysts

Cited by 23 publications

References 52 publications

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Recent Insights in Transition Metal Sulfide Hydrodesulfurization Catalysts for the Production of Ultra Low Sulfur Diesel: A Short Review

Biomass‐assisted Zeolite Syntheses as a Tool for Designing New Acid Catalysts

High Active Zn/Mg-Modified Ni–P/Al2O3 Catalysts Derived from ZnMgNiAl Layered Double Hydroxides for Hydrodesulfurization of Dibenzothiophene

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