Ordered mesoporous “one-pot” synthesized Ni-Mg(Ca)-Al2O3 as effective and remarkably stable catalysts for combined steam and dry reforming of methane (CSDRM)

Jabbour, Karam; Massiani, Pascale; Davidson, Anne; Casale, Sandra; Hassan, Nissrine El

doi:10.1016/j.apcatb.2016.08.009

Cited by 139 publications

(94 citation statements)

References 76 publications

(157 reference statements)

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“…With such one‐pot method combined to an Evaporation‐Induced Self‐Assembly (EISA) route, we recently synthesized well‐organized mesoporous Ni/alumina materials where nickel was integrated as isolated species in the walls. This led to a high nickel dispersion after reduction as well as after subsequent catalytic test in the harsh conditions of DRM, with mean size of the metal nanoparticles in the spent catalysts much below those commonly reported in the literature . The benefits of intimately mixing the active metal and the support precursors at the steps of material synthesis was similarly demonstrated in the literature in works where DRM catalysts were prepared via a solid‐phase crystallization route consisting in first exchanging a mineral precursor (perovskites, hydrotalcites, pyrochlores or spinels) with nickel cations, then calcining it to obtain a nickel‐containing oxide solid solution and finally reducing it to give the catalyst .…”

Section: Introductionmentioning

confidence: 83%

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

et al. 2019

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An Al‐containing MIL‐53 metal‐organic framework with very high surface area (SBET=1130 m2.g−1, N2 sorption) was used as sacrificial template to prepare a nickel‐alumina‐based catalyst (Ni0AlMIL) highly active and stable in the reaction of dry reforming of methane (DRM). The procedure consisted in impregnating the activated (solvent free) MIL‐53 sample with a nickel precursor solution, then calcining the material to remove the organic linkers and subsequently reducing it to form the reduced nickel active phase. At the step of calcination, this procedure results in the formation of a porous uniform spinel phase with Ni nanospecies embedded in the alumina‐based matrix, as deduced from XRD, TPR and TEM analyses. This leads after reduction to a porous lamellar γ‐Al2O3 material with small Ni0 nanoparticles homogeneously dispersed and stabilized within the support. The performances of this catalyst in DRM are better than those of two reference Ni/alumina catalysts prepared for comparison by conventional nickel impregnation of two preformed alumina supports: a first one obtained by calcination of MIL‐53 (AlMIL) and a second one consisting of a commercial γ‐Al2O3 batch (AlCOM). Under steady state conditions at a temperature of 650 °C and a pressure of 1 bar, the higher CH4 and CO2 conversions (till 3 times higher than on Ni0/AlCOM), high catalytic stability (no loss of activity after 13–100 h) and higher selectivity towards DRM (H2:CO products ratio remaining at 1) on Ni0AlMIL compared to the other catalysts is believed to come from the particularly strong interaction between the nickel and alumina phases generated by using the unique high specific surface of the parent MOF support to deposit nickel. This creates an intimate mixing favorable to a persisting interaction of the nickel nanoparticles with the alumina support in the reduced material. The lamellar shape of the γ‐Al2O3 composing the catalyst and its remaining high specific surface may also contribute to the excellent Ni resistance to sintering and in turn to the inhibition of carbon nanotubes formation during the reaction.

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Section: Introductionmentioning

confidence: 83%

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

et al. 2019

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“…This matter has increased worldwide environmental concern [1][2][3][4]. Further improvements in the efficiency of energy production processes and the use of environmental friendly energy carriers are effective methods to overcome these problems [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…Excessive consumption of fossil fuels (natural gas, coal and oil) and emission of large amount of greenhouse gases such as CO 2 have an uncontrollable impact on global warming. This matter has increased worldwide environmental concern [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Ca-, Mg-and Li-based solid sorbents are highly impressive sorbents in CO 2 sorption process. However, Ca-based sorbents are more interesting because of its high CO 2 sorption capacity (0.786 g of CO 2 /g of sorbent), resistivity of coke rein, stability in long term cyclic operation, low cost and wide availability [28][29][30][31]. The exothermic carbonation reaction between calcium oxide and CO 2 is performed as shown in Equation (6).…”

Section: Introductionmentioning

confidence: 99%

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Promotion of Ca-Co Bifunctional Catalyst/Sorbent with Yttrium for Hydrogen Production in Modified Chemical Looping Steam Methane Reforming Process

et al. 2017

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Abstract:In this study, the application of a calcium-based bifunctional catalyst/sorbent is investigated in modified chemical looping steam methane reforming (CLSMR) process for in situ CO 2 sorption and H 2 production. The yttrium promoted Ca-Co samples were synthesized and applied as bifunctional catalysts/sorbent. The influence of reduction temperature (500-750 • C), Ca/Co and Ca/Y ratios (1.5-∞ and 3-18, respectively) and catalyst life time are determined in CLSMR process. The physicochemical transformation of fresh, used and regenerated samples after 16 redox cycles are determined using X-ray powder diffraction (XRD), N 2 adsorption-desorption, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM) techniques. The effect of yttrium promoter on the structure of catalyst and regeneration step on the reversibility of bifunctional catalyst/sorbent was two important factors. The characterization results revealed that the presence of yttrium in the structure of Ca-9Co sample could improve the morphology and textural properties of catalyst/sorbents. The suitable reversibility of bifunctional catalyst/sorbents during the repeated cycles is confirmed by characterization of calcined samples. The Ca-9Co-4.5Y as optimal catalyst illustrated superior performance and stability. It showed about 95.8% methane conversion and 82.9% hydrogen yield at 700 • C and stable activity during 16 redox cycles.

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“…With the purpose of suppressing the carbon deposition and improving its catalytic activity, a wide diversity of promoters, such as lanthanum, cerium, magnesium, and calcium, have been incorporated into the structure of the support [28][29][30]. Li et al [28] assessed ceria-promoted Ni/SBA-15 catalysts for ethanol steam reforming.…”

Section: Introductionmentioning

confidence: 99%

Inhibiting Fe–Al Spinel Formation on a Narrowed Mesopore-Sized MgAl2O4 Support as a Novel Catalyst for H2 Production in Chemical Looping Technology

Hafizi

Rahimpour

2018

Catalysts

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Abstract:In this paper, the structure of Al 2 O 3 is modified with magnesium to synthesize MgAl 2 O 4 as an oxygen carrier (OC) support. The surface properties and structural stability of the modified support are improved by the incorporation of magnesium in the structure of the support and additionally by narrowing the pore size distribution (about 2.3 nm). Then, iron oxide is impregnated on both an

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Ordered mesoporous “one-pot” synthesized Ni-Mg(Ca)-Al2O3 as effective and remarkably stable catalysts for combined steam and dry reforming of methane (CSDRM)

Cited by 139 publications

References 76 publications

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

Porous Nickel‐Alumina Derived from Metal‐Organic Framework (MIL‐53): A New Approach to Achieve Active and Stable Catalysts in Methane Dry Reforming

Promotion of Ca-Co Bifunctional Catalyst/Sorbent with Yttrium for Hydrogen Production in Modified Chemical Looping Steam Methane Reforming Process

Inhibiting Fe–Al Spinel Formation on a Narrowed Mesopore-Sized MgAl2O4 Support as a Novel Catalyst for H2 Production in Chemical Looping Technology

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