Studies of the model Ni-Mo/alumina catalysts in the n-butane hydrogenolysis reaction

Borowiecki, T.; Dziembaj, R.; Drozdek, Marek; Giecko, Grzegorz; Pańczyk, M.; Piwowarska, Zofia

doi:10.1016/s0926-860x(03)00057-7

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…Therefore, we speculate that Reaction (R16) is less favourable in the presence of Mo. The lesser CH 4 production in the presence of Mo is in agreement with results from the work of Boroweicki et al[50], where they studied butane hydrogenolysis over different Mo-Ni catalysts at low temperatures (240-260°C) and found that CH 4 selectivity was lower with the addition of Mo to the Ni catalysts. They also found that CH 4 selectivity decreased as they increased the Mo loading from 0.1 to 4% wt.…”

supporting

confidence: 92%

“…TPR experiments for 0.5Mo and 1Mo catalysts showed that MoOx exists in different oxidation states, and are reduced at lower temperatures in the presence of Ni. Similar conclusions were drawn using XPS measurements of a reduced Mo-Ni catalyst[50], where the authors suggested the presence of Mo as Mo +6 , Mo 0 and Mo +n (4 < n <5).Therefore, MoOx species can also undergo redox cycling during the course of the reaction, contributing to oxygen mobility on the catalyst surface and preventing coking. This higher oxygen ion conductivity indeed resulted in higher CO and H 2 yields over 0.5Mo than 0.1Mo as proved by SR activity runs in Section 3.1.…”

supporting

confidence: 71%

“…O 2 uptakes at the two temperatures for the three catalysts are presented inTable 2.TPR runs for the 0.5Mo and 1% Mo-15Ni catalysts revealed that Mo can exist in different oxidation states. This was also proven through XPS measurements of a reduced Mo-Ni catalyst by Borowiecki et al[50], as they indicated the presence of Mo in the forms of Mo +6 , Mo 0 and Mo +n (4 < n <5). The existence of Mo in different oxidation states can facilitate redox properties of Mo-containing catalysts.…”

mentioning

confidence: 62%

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Effect of interactions between Ni and Mo on catalytic properties of a bimetallic Ni-Mo/Al 2 O 3 propane reforming catalyst

Malaibari

Croiset

Amin

et al. 2015

Applied Catalysis A: General

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supporting

confidence: 92%

supporting

confidence: 71%

mentioning

confidence: 62%

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Effect of interactions between Ni and Mo on catalytic properties of a bimetallic Ni-Mo/Al 2 O 3 propane reforming catalyst

Malaibari

Croiset

Amin

et al. 2015

Applied Catalysis A: General

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“…The yield to C3 products (acetol, 1,2-PDO, and 1-propanol) increased from 11.8%, when using bare Ru/SiO 2 , to 23.6% when Mo was added. Mo catalysts have also been used in the hydrogenolysis of 4-(1-naphthylmethyl)bibenzyl, 32 n-butane, 33,34 and tetrahydrofurfuryl alcohol. 35 Here we report supported Mo and W catalysts in the hydrogenolysis of glycerol and the effect of temperature and H 2 content on the conversion of glycerol and selectivities to monoalcohols under continuous flow conditions.…”

Section: ■ Introductionmentioning

confidence: 99%

Hydrogenolysis of Glycerol to Monoalcohols over Supported Mo and W Catalysts

Shozi

Dasireddy

Singh

et al. 2016

ACS Sustainable Chem. Eng.

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MoO3 and WO3 were supported on γ-Al2O3 and SiO2 with nominal loadings of 10 wt % via wet impregnation. The catalysts were characterized using XRD, TPR, Pulse TPD, Raman, TEM, and BET surface area. The alumina supported catalysts were found to contain higher Brønsted acidity compared to those supported on silica. These catalysts were evaluated in the hydrogenolysis of glycerol in a continuous flow fixed bed reactor in a temperature range of 250−325 °C and a H2 pressure of 60 bar. All catalysts were active, with activity increasing with temperature as well as Brønsted acidity. The selectivity to ethylene glycol and 1,2-propanediol decreased with increase in temperature. In parallel, the selectivity to lower alcohols such as methanol, ethanol, 2-propanol, and 1-propanol increased with temperature as the ethylene glycol and 1,2propanediol reacted further to these products due to C−C bond cleavage. The total selectivity to lower alcohols was 34.6, 64.8, 70.6, and 54.6% over Mo/Al2O3, Mo/SiO2, W/Al2O3, and W/SiO2 respectively. The total selectivity to lower alcohols increased to 73.6, 72.8, 85.3, and 66.1% over Mo/Al2O3, Mo/SiO2, W/Al2O3, and W/SiO2 respectively when the H2:glycerol ratio was doubled.

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“…In the hydrogen production processes, catalysts play a very critical role to increase the hydrogen yield and purity as well as to reduce the undesirable by‐products 7–10. However, optimization of reactor temperature and pressure is also essential to improve the quality of the hydrogen produced 11, 12…”

Section: Introductionmentioning

confidence: 99%

Hydrogen production by methanol‐steam reforming using NiMoCu/γ‐alumina trimetallic catalysts

Yaakob

Kamarudin

Daud

et al. 2010

Asia-Pacific J Chem Eng

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Recent attention has focused on steam reforming (SR) of methanol to produce high-purity hydrogen for 'clean' energy applications. Methanol (as a hydrogen carrier) is a renewable and easily accessible energy source that can be produced from biomass and natural gas; the advantages are its availability, high energy density, relative low cost, and easy storage and transportation. In the hydrogen production processes, catalysts play a very critical role for increasing the hydrogen yield and purity as well as reducing by-products. In this study, the thermodynamic parameters of the methanol-SR reaction were evaluated. Several Ni-Mo-Cu/γ -alumina trimetallic catalysts with different compositions were prepared by a wet impregnation method. The hydrogen production efficiency of the catalysts was evaluated for the methanol-SR reaction. Thermodynamic studies of the reaction showed that methanol-SR was an exothermic and spontaneous reaction for all catalysts investigated. Thermodynamic considerations revealed that a catalyst with a composition of 7 wt% Cu, 0.2 wt% Mo and 0.2 wt% Ni was the most reactive catalyst with an enthalpy of −663.102 kcal. Experimental results showed that the optimum reaction occurred at 548 K and pressure of 3 bar. At these conditions, the production of undesirable by-products such as CO and CO 2 was negligible.  2009 Curtin

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Studies of the model Ni-Mo/alumina catalysts in the n-butane hydrogenolysis reaction

Cited by 9 publications

References 26 publications

Effect of interactions between Ni and Mo on catalytic properties of a bimetallic Ni-Mo/Al 2 O 3 propane reforming catalyst

Effect of interactions between Ni and Mo on catalytic properties of a bimetallic Ni-Mo/Al 2 O 3 propane reforming catalyst

Hydrogenolysis of Glycerol to Monoalcohols over Supported Mo and W Catalysts

Hydrogen production by methanol‐steam reforming using NiMoCu/γ‐alumina trimetallic catalysts

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