Effect of the divalent metal and the activation temperature of NiMoW and CoMoW on the dibenzothiophene hydrodesulfurization reaction

Amaya, Sandra; Alonso-Núñez, G.; Zepeda, T.A.; Fuentes, S.; Echavarrı́a, Adriana

doi:10.1016/j.apcatb.2013.10.057

Cited by 62 publications

(16 citation statements)

References 32 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%

“…Layered double hydroxides (LDH) are used as precursors and structural templates as well for the synthesis of HDS catalysts [147]. The activity of catalysts derived from the LDHs are dependent on the geometric position of the hexavalent metal ions in tetrahedral or in octahedral coordination [144], the surface area of the precursor oxides, promoter content, activation temperatures, etc. Similar properties were observed for catalysts derived from thiosalts and LDHs.…”

Section: Template-free Methodsmentioning

confidence: 99%

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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%

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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“…Owing to increasing environmental concerns and stringent regulations, hydrodesulfurization (HDS) has become an important process for the catalytic removal of heteroatom-containing compounds from petroleum [1]. HDS catalysts are regarded as the core of the hydrotreating process, and are primarily composed of molybdenum and/or tungsten sulfides enhanced with nickel or cobalt sulfides and dispersed on alumina [2,3]. When the sulfur content in the HDS product must be ultra-low (less than 10-15 μg/g), it is necessary to remove highly refractory sulfur-containing compounds such as 4methyl-dibenzothiophene and 4,6-dimethyl-dibenzothiophene [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…Previous results have shown that ammonium nickel molybdate ((NH4)HNi2(OH)2(MoO4)2, ANM), which is composed of tetrahedral molybdate and octahedral nickel ions [9], is a good precursor for the preparation of highly-active unsupported HDS catalysts [3,[10][11][12][13]. The unsupported HDS catalysts derived from ANM exhibit high catalytic activities towards sulfur and nitrogen compounds and poly-aromatics [3,[10][11][12][13]. However, the methods available for the preparation of ANM are limited to chemical precipitation and hydrothermal reactions [3,[9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

“…The unsupported HDS catalysts derived from ANM exhibit high catalytic activities towards sulfur and nitrogen compounds and poly-aromatics [3,[10][11][12][13]. However, the methods available for the preparation of ANM are limited to chemical precipitation and hydrothermal reactions [3,[9][10][11][12][13]. These techniques consume considerable quantities of water and precipitation agents and also generate large amounts of waste, thus leading to low yields of the desired product.…”

Section: Introductionmentioning

confidence: 99%

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Sustainable synthesis of ammonium nickel molybdate for hydrodesulfurization of dibenzothiophene

Liu

Yin

Zhang

2016

Chinese Journal of Catalysis

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This paper reports a sustainable, water-assisted, solid-state method for synthesizing ammonium nickel molybdate ((NH4)HNi2(OH)2(MoO4)2, ANM), a precursor for an unsupported hydrodesulfurization (HDS) catalyst. The associated ANM formation mechanism is also discussed. The synthesis route consists of physical mixing of the raw materials, water-assisted grinding and heating. The formation mechanism involves replacement of a Mo atom by a Ni atom, generating the metastable intermediate (NH4)4(NiH6Mo6O24)•5H2O. Heating of this intermediate at 120 °C removes the added water and produces ANM. Catalysts prepared by this method exhibit almost the same physicochemical properties and catalytic performance during the HDS of dibenzothiophene as materials made from ANM synthesized by a chemical precipitation procedure. Compared with traditional hydrothermal or chemical precipitation methods, this water-assisted, solid-state synthesis provides several significant advantages, including simplifying the synthetic procedure, reducing waste and energy costs and increasing product yields. These features will be highly important with regard to allowing the application of ANM in industrial-scale processes involving HDS reactions. This water-assisted, solid-state strategy can also be extended to the synthesis of isomorphous compounds such as ammonium cobalt (zinc and copper) molybdate.

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Corrosion and Alloy Engineering in Rational Design of High Current Density Electrodes for Efficient Water Splitting

Jothi

Karuppasamy

Maiyalagan

et al. 2020

Advanced Energy Materials

124

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Alongside rare‐earth metals, Ni, Fe, Co, Cu are some of the critical materials that will be in huge demand thanks to growth in clean‐energy sector. Herein scrap stainless steel wires (SSW) from worn‐out tires are employed as a support material for catalyst integration in the hydrogen evolution reaction (HER). In addition, SSW by corrosion engineering is exercised as an in situ formed freestanding robust electrode for the oxygen evolution reaction (OER). By superficial corrosion of SSW, inherent active species are unmasked in the form of Ni/FeOOH nanocrystallites displaying efficient water oxidation by reaching 500 mA cm−2 at low overpotential (η500) of 287 mV in 1 m KOH. Similarly, cathode scrap SSW with active (alloy) coatings of MoNi4 catalyzes the HER at η‐200 = 77 mV, with a low activation energy (Ea = 16.338 kJ mol−1) and high durability of 150 h. Promisingly, when used in industrial conditions, 5 m KOH, 343 K, these electrodes demonstrate abnormal activity by yielding high anodic and cathodic current density of 1000 mA cm−2 at η = 233 mV and η = 161 mV, respectively. This work may inspire researchers to explore and reutilize high‐demand metals from scrap for addressing critical material shortfalls in clean‐energy technologies.

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Effect of the divalent metal and the activation temperature of NiMoW and CoMoW on the dibenzothiophene hydrodesulfurization reaction

Cited by 62 publications

References 32 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

Sustainable synthesis of ammonium nickel molybdate for hydrodesulfurization of dibenzothiophene

Corrosion and Alloy Engineering in Rational Design of High Current Density Electrodes for Efficient Water Splitting

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