Characterization of New Bimetallic Oxycarbide (MoWC0.5O0.6) for Bifunctional Isomerization of n-Heptane

Lamic, Anne-Félicie; Shin, Chae‐Ho; Djéga‐Mariadassou, Gérald; Potvin, Claude

doi:10.1007/s10562-005-9735-9

Cited by 15 publications

(12 citation statements)

References 21 publications

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“…There are a large number of studies reported in the literature on the synthesis and analysis of the isomer ization properties of various types of acid catalysts, including those based on chlorinated alumina, various types of zeolites, mesoporous aluminosilicates and sil icates (such as MCM), silicoaluminophosphates (SAPO), salts of heteropoly acids, anion modified metal oxides, and catalysts based on porous oxides and carbides of molybdenum and tungsten [11][12][13][14][15][16][17][18][19]. The most active and selective platinized catalysts based on aluminum chloride, which give a possibility to run the process at a low temperature (below 180°С), and those based on high silica zeolites, which are efficient at higher temperatures (above 250°С), have found wide use in industrial processes [4-7, 20, 21].…”

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confidence: 99%

The catalytic properties of tungstated zirconia in n-heptane isomerization

2012

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The catalytic properties of zirconia modified with different amounts of tungstate anions in the hydroisomerization of n heptane and its mixtures with benzene or toluene have been studied. It has been found that at a low temperature of 170°C, the yield of isoheptanes reaches 62.8% with a fairly high selectivity of 87.6% on the Pt/WO 4 2-/ZrO 2 catalyst prepared by impregnation to contain 17.6 mol % tungstate anions. Under the same conditions, the yield of isoheptanes on a sulfated Pt/SO 4 2-/ZrO 2 catalyst is as low as 14.0% with a selectivity of 20.3%. The hydroisomerization process effectively occurs on the tungstated catalyst in the presence of benzene or toluene.

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confidence: 99%

The catalytic properties of tungstated zirconia in n-heptane isomerization

2012

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“…Similarly, reaction routes were consistent with those observed for the molybdenum carbide. Carbides of molybdenum and tungsten can be modified to corresponding oxycarbide materials producing enhanced isomerization characteristics .…”

Section: Catalysts For Hydroisomerization Of Sustainable Feedstockmentioning

confidence: 99%

Hydroisomerization of sustainable feedstock in biomass-to-fuel conversion: a critical review

Galadima

Muraza

2014

Int. J. Energy Res.

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Summary The production of diesel and gasoline range paraffins from both solid and liquid biomass is one of the promising alternatives being considered for ensuring sustainable fuel supply. Solid biomass gasification produces synthetic gas, which via subsequent Fischer–Tropsch reaction is converted into useful liquid hydrocarbon fuels. Similarly, pyrolysis generates oxygenated and bio‐oil products with comparable fuel potentials. The liquid biomass such as vegetable oils, on the other hand can be upgraded by serial hydrogenation, cracking, deoxygenation, and decarboxylation. We have critically reviewed substantial literature on the various conversion processes and the hydroisomerization of the linear bioparaffins into isomerized products with enhanced fuel properties. Emphasis was given to the heterogeneous catalyst systems, operational parameters, reaction mechanisms, and identified challenges. The scope was extended to cover different porous catalysts with prospects in biomass‐to‐fuel conversion. Copyright © 2014 John Wiley & Sons, Ltd.

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“…The use of highly dispersed molybdenum and tungsten carbides is one of the promising directions in the development of catalytic processes, including hydrogen evolution reactions and the production of synthesis gas [ 1 , 2 , 3 , 4 , 5 , 6 ]. The main trend in the preparation of molybdenum and tungsten carbides is the focus on the synthesis of highly dispersed catalytic material.…”

Section: Introductionmentioning

confidence: 99%

Molybdenum–Tungsten Blue Nanoparticles as a Precursor for Ultrafine Binary Carbides

et al. 2021

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Herein, we demonstrate a promising method for the synthesis of ultrafine carbide particles using dispersions of molybdenum–tungsten nanoparticles. Dispersions of molybdenum–tungsten blue nanoparticles with different initial molar ratios of molybdenum/tungsten were synthesized through the reduction of molybdate and tungstate ions by ascorbic acid in an acidic medium (pH = 1.0–2.5). Molybdenum–tungsten blue nanoparticles were characterized by ultraviolet–visual (UV–VIS), infrared (FTIR), and X-ray photoelectron (XPS) spectroscopies; transmission electronic microscopy (TEM); and dynamic light scattering (DLS). We demonstrated that molybdenum–tungsten blue nanoparticles belong to toroidal polyoxometalate clusters (λmax = 680–750 nm) with a predominant particle size of 4.0 nm. Molybdenum–tungsten blue dispersions were shown to be monodispersed systems with a small particle size and long-term stability (>30 days) and are suitable for further catalytic applications.

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Characterization of New Bimetallic Oxycarbide (MoWC0.5O0.6) for Bifunctional Isomerization of n-Heptane

Cited by 15 publications

References 21 publications

The catalytic properties of tungstated zirconia in n-heptane isomerization

The catalytic properties of tungstated zirconia in n-heptane isomerization

Hydroisomerization of sustainable feedstock in biomass-to-fuel conversion: a critical review

Molybdenum–Tungsten Blue Nanoparticles as a Precursor for Ultrafine Binary Carbides

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