Binder effect on the catalytic activity of MoO3 bulk catalyst reduced by H2 for n-heptane hydroisomerization

Alemán-Vázquez, Laura O.; Hernández-Pérez, Fidencio; Cano-Domínguez, José Luis; Rodríguez-Hernández, Andrea; García-Gutiérrez, José Luis

doi:10.1016/j.fuel.2013.08.085

Cited by 26 publications

(15 citation statements)

References 63 publications

(31 reference statements)

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“…It can be seen that within the range of saturated adsorption, the size of the Pt NPs changed weakly. In addition to using a traditional reductant, high-temperature H 2 calcination is also a common method for reducing metal catalysts . As a result, the catalyst reduced by H 2 (denoted as CNM/Pt–H 2 ) was also studied as a control, and the CNM reached saturation adsorption.…”

Section: Results and Discussionmentioning

confidence: 99%

“…In addition to using a traditional reductant, high-temperature H 2 calcination is also a common method for reducing metal catalysts. 31 As a result, the catalyst reduced by H 2 (denoted as CNM/Pt−H 2 ) was also studied as a control, and the CNM reached saturation adsorption. As shown in Figure S3, the Pt NPs in CNM/ Pt−H 2 were evenly dispersed in the CNM with an average diameter of 4.8 nm.…”

Section: Methodsmentioning

confidence: 99%

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Facile Construction of a Highly Dispersed Pt Nanocatalyst Anchored on Biomass-Derived N/O-Doped Carbon Nanofibrous Microspheres and Its Catalytic Hydrogenation

Pei

Jiao

et al. 2020

ACS Appl. Mater. Interfaces

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With the depletion of nonrenewable resources and the increasingly serious “white pollution” caused by nondegradable plastics, using renewable biomass resources such as chitin to fabricate materials is a green and sustainable pathway. Herein, for the first time, we used N/O-doped carbon nanofibrous microspheres (CNMs) derived from renewable chitin as carriers to successfully construct a highly dispersed platinum nanocatalyst via a facile way. Various physicochemical characterizations provided reliable evidence for the ultrafine and well-dispersed platinum nanoparticles with an average diameter of 2.3 nm. As the supporting framework, the CNM with interconnected nanofibrous networks and a large surface area facilitated the adhesion and dispersion of Pt particles. Meanwhile, the inherent N/O-containing functional groups and the defects in carbonized chitin could anchor the platinum tightly. The CNM/Pt catalyst was further examined for hydrogenation, and it exhibited promising catalytic activity and stability (∼5 runs, 91%) and a broad applicability. This utilization of biomass resources to build catalyst materials would be important for the green and sustainable chemistry.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Facile Construction of a Highly Dispersed Pt Nanocatalyst Anchored on Biomass-Derived N/O-Doped Carbon Nanofibrous Microspheres and Its Catalytic Hydrogenation

Pei

Jiao

et al. 2020

ACS Appl. Mater. Interfaces

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“…Because of distinct surface chemistry each binder behaves in its own ways when mixed with an active component. Although the scope of academic investigations in catalyst preparations is predominantly based on the active component itself, several essential properties of technical catalysts result from the presence of binders. ,− Scale-up of catalytic materials to industrial levels for monoliths and pelletized materials ,,, has been reported addressing to some extent the influence of binders.…”

Section: Introductionmentioning

confidence: 99%

Shaping of Sulfated Zirconia Catalysts by Extrusion: Understanding the Role of Binders

Devyatkov

Zinnurova

Aho

et al. 2016

Ind. Eng. Chem. Res.

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Sulfated zirconia hydroxide shaping by extrusion is studied based on elucidating the impact of zeta-potential and rheological characteristics on physical and chemical properties of technical catalysts. Zeta potential measurements of sulfated zirconium hydroxide prior and after poly(vinyl alcohol) (PVA) additions were made. Rheological curves of sulfated zirconium hydroxide suspensions with different amounts of PVA were recorded at different zeta-potential values. The addition of PVA nonlinearly decreased shear yield stress. Experimental data were quantified with the Krieger–Dougherty equation. The influence of a boehmite-type binder on the zeta-potential confirmed that the surface properties of the particles to a large extent are determined by the presence of binder. The pore structure of shaped catalysts was unaffected by rheological parameters when zeta-potential is close enough to zero. At the same time deviations of the zeta potential from the zero-value afforded more uniform pore size distribution.

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“…The TPR profile of Mo/Al 2 O 3 exhibits three reduction peaks at temperatures of 488, 613, and 781 °C. In general, the reduction of molybdenum species follows the pathway below as reported: , Reaction , the reduction process of MoO 3 to MoO 2 , occurs over a temperature range of 450–650 °C. Reaction occurs at a temperature range of 650–800 °C and is assigned to the reduction of MoO 2 to molybdenum metal .…”

Section: Results and Discussionmentioning

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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Binder effect on the catalytic activity of MoO3 bulk catalyst reduced by H2 for n-heptane hydroisomerization

Cited by 26 publications

References 63 publications

Facile Construction of a Highly Dispersed Pt Nanocatalyst Anchored on Biomass-Derived N/O-Doped Carbon Nanofibrous Microspheres and Its Catalytic Hydrogenation

Facile Construction of a Highly Dispersed Pt Nanocatalyst Anchored on Biomass-Derived N/O-Doped Carbon Nanofibrous Microspheres and Its Catalytic Hydrogenation

Shaping of Sulfated Zirconia Catalysts by Extrusion: Understanding the Role of Binders

Hydrogenolysis of Glycerol to Monoalcohols over Supported Mo and W Catalysts

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