Highly porous monolith/TiO 2 supported Cu, Cu-Ni, Ru, and Pt catalysts in methanol steam reforming process for H 2 generation

Tahay, Pooya; Khani, Yasin; Jabari, Mohammad; Bahadoran, Farzad; Safari, Nasser

doi:10.1016/j.apcata.2018.01.022

Cited by 85 publications

(34 citation statements)

References 77 publications

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“…The Cu-Ni/ZrO 2 system exhibited the highest catalytic activity at lower reaction temperatures compare to the investigated monometallic catalysts. Tahay et al [12] investigated Cu, Cu-Ni, Ru, and Pt catalysts supported on TiO 2 /monolith used in H 2 generation in SRM reaction. The BET measurement showed that the Specific Surface Area (SSA) of the catalysts increased by the co-impregnation of Ni and Cu which resulted in improvement of the methanol conversion value.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

et al. 2020

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In this work, bimetallic Cu-Ni catalysts supported on binary oxides containing ZnO, ZrO 2 , CeO 2 and Al 2 O 3 were investigated in hydrogen production via the oxidative steam reforming of methanol (OSRM). Their physicochemical properties were extensively studied using various methods such as BET, TPR-H 2 , TPD-NH 3 , XRD, SEM-EDS, ToF-SIMS and XPS. The reactivity measurements showed that the active phase and support composition played an important role in the activity of the catalyst in the OSRM. The most active system at higher temperatures was 30% Cu-10% Ni/CeO 2 ·Al 2 O 3 , with high catalytic activity attributed to the Cu 0.8 Ni 0.2 alloy formation. In addition, the reactivity results showed that the most active catalyst exhibited high acidity and was easily reduced. At low temperatures, the best catalytic properties were exhibited by 30% Cu-10% Ni/ZrO 2 ·Al 2 O 3 . The reactivity and physicochemical properties of the studied catalysts confirmed the crucial role of alloy composition on their catalytic properties in the oxy-steam reforming of methanol. The obtained results validate the possibility of using Cu-Ni catalysts for hydrogen production.

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Section: Introductionmentioning

confidence: 99%

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

et al. 2020

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“…However, Cu-catalyst suffers from some serious drawbacks such as pyrophoricity and catalyst sintering [5][6][7]. To overcome the drawbacks of Cu catalyst, numerous alternative materials have been examined, including noble metal catalysts [8][9][10], Ni-Cu alloy-based catalysts [11][12][13], and Ni-based catalysts [7,[14][15][16]. On one hand, noble metals (Pd, Pt) are known to be the most active catalysts for MSR [8][9][10], but the high prices limit their large-scale industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Density Functional Theory Based Micro- and Macro-Kinetic Studies of Ni-Catalyzed Methanol Steam Reforming

Lin

2020

Catalysts

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The intrinsic mechanism of Ni-catalyzed methanol steam reforming (MSR) is examined by considering 54 elementary reaction steps involved in MSR over Ni(111). Density functional theory computations and transition state theory analyses are performed on the elementary reaction network. A microkinetic model is constructed by combining the quantum chemical results with a continuous stirring tank reactor model. MSR rates deduced from the microkinetic model agree with the available experimental data. The microkinetic model is used to identify the main reaction pathway, the rate determining step, and the coverages of surface species. An analytical expression of MSR rate is derived based on the dominant reaction pathway and the coverages of surface species. The analytical rate equation is easy to use and should be very helpful for the design and optimization of the operating conditions of MSR.

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“…The conventional reactor for the MSR process is a fixed‐bed reactor, but fixed‐bed reactors have some disadvantages, including a pressure drop problem, resistance to mass transfer, and inappropriate flow distribution . Some features of micro‐reactors include parameters such as smaller size and weight of equipment, high mass and heat transfer rates, lower pressure‐drop loss, stability in terms of structure and heat, and precise control of reaction conditions .…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, since the distribution of the catalyst on the monolith reactor is more uniform, the interaction of the catalyst with feed increases to a great extent; consequently, better performance of the MSR process can be achieved . Conversely, in a fixed‐bed reactor, most of the catalyst remains practically unusable due to the inappropriate mass transfer process, and most importantly a better dispersion of the catalyst on the monolithic reactor decreases the amount of coke nucleation and raises the catalyst stability …”

Section: Introductionmentioning

confidence: 99%

Embedding Pt‐SnO Nanoparticles into MIL‐101(Cr) Pores: Hydrogen Production with Low Carbon Monoxide Content from a New Methanol Steam Reforming Catalyst

et al. 2019

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The catalyst Pt‐SnO@MIL‐101(Cr) was prepared using the cis‐PtCl(SMe2)2(SnCl3) complex as a single precursor and characterized by inductively coupled plasma optical emission spectroscopy, (ICP‐OES), X‐ray powder diffraction (XRD), BET surface area analysis (SBET), X‐ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), field‐emission scanning electron microscopy (FE‐SEM), and temperature program reduction (TPR). A new complex, cis‐PtCl(SMe2)2(SnCl3), was synthesized from the reaction of PtCl2(SMe2)2 with SnCl2 and characterized by thermogravimetric analysis (TGA), ICP‐OES, and 1H NMR spectroscopy and used as the source of metals for preparation of the catalysts. The fabricated catalyst, Pt‐SnO@MIL‐101(Cr), with 10.2%, 19.7%, and 28.9% platinum loadings were used in a steam reforming of methanol (MSR) reaction using a microstructure monolith reactor in the temperature range of 150–300 °C. A high methanol conversion with a good selectivity of H2 and low CO selectivity was achieved in light of the stability of the catalyst with a small amount of coke formation in the monolith system.

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Highly porous monolith/TiO 2 supported Cu, Cu-Ni, Ru, and Pt catalysts in methanol steam reforming process for H 2 generation

Cited by 85 publications

References 77 publications

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Density Functional Theory Based Micro- and Macro-Kinetic Studies of Ni-Catalyzed Methanol Steam Reforming

Embedding Pt‐SnO Nanoparticles into MIL‐101(Cr) Pores: Hydrogen Production with Low Carbon Monoxide Content from a New Methanol Steam Reforming Catalyst

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