Effect of supports on the performance of Co-based catalysts in methane dry reforming

Park, Jung Hyun; Yeo, Suyeon; Chang, Tae‐Sun

doi:10.1016/j.jcou.2018.06.002

Cited by 72 publications

(32 citation statements)

References 41 publications

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“…• indicates the presence of amorphous silica [32,37]. In the case of the Ni-SiO 2 catalyst, the absence of reflections assigned to nickel oxide may indicate a high dispersion and small size of the NiO particles.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…Moreover, strong interaction between an active metals and a support may also minimize aggregation due to Ni being retained. Zhang et al [32] investigated the effect of TiO 2 , ZrO 2 , SiO 2 , Al 2 O 3 , and MgO supports on the catalytic activity of nickel catalysts in the DRM process. They found that a strong interaction between NiO particles and MgO and Al 2 O 3 resulted in a superior catalytic performance, high dispersion, and stabilization of NiO species.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process

2019

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Dry reforming of methane (DRM) is an eco-friendly method of syngas production due to the utilization of two main greenhouse gases—methane and carbon dioxide. An industrial application of methane dry reforming requires the use of a catalyst with high activity, stability over a long time, and the ability to catalyze a reaction, leading to the needed a hydrogen/carbon monoxide ratio. Thus, the aim of the study was to investigate the effect of support and noble metal particles on catalytic activity, stability, and selectivity in the dry reforming process. Ni and Ni–Ru based catalysts were prepared via impregnation and precipitation methods on SiO2, ZrO2, Al2O3, and MgAl2O4 supports. The obtained catalysts were characterized using X-ray diffractometry (XRD), inductively coupled plasma optical emission spectrometry (ICP-OES), Brunauer–Emmett–Teller (BET) specific surface area, and elemental carbon-hydrogen-nitrogen-sulphur analysis (CHNS) techniques. The catalytic activity was investigated in the carbon dioxide reforming of a methane process at 800 °C. Catalysts supported on commercial Al2O3 and spinel MgAl2O4 exhibited the highest activity and stability under DRM conditions. The obtained results clearly indicate that differences in catalytic activity result from the dispersion, size of an active metal (AM), and interactions of the AM with the support. It was also found that the addition of ruthenium particles enhanced the methane conversion and shifted the H2/CO ratio to lower values.

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Section: Catalyst Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process

2019

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“…[7] However, most of the existing catalysts using common oxide supports as well conventional nickel deposition routes face two important drawbacks: firstly metal sintering, which is accentuated by the high temperature at which the reaction has to be carried out due to thermodynamic reasons; [8,9] secondly, important formation of carbon deposits during the course of the reaction, due to the occurrence of CH 4 decomposition as side reaction [10,11] that leads to progressive activity loss by inhibiting the active sites and to plugging of the reactor when carbon nanotubes are formed in big amount. [12,13] In the last decade, numerous attempts like the use of a bimetallic catalyst [14][15][16] or altering the type of support [17,18] have been made to overcome these barriers and design more robust catalysts.…”

Section: Introductionmentioning

confidence: 99%

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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“…Typical heterogeneous DR catalysts use inorganic oxide supports; e.g., Al 2 O 3 , SiO 2 , TiO 2 [6,[12][13][14]. The active sites fall into two groups.…”

Section: Introductionmentioning

confidence: 99%

“…The active sites fall into two groups. First are base-metals, including Fe, Co, and Ni [6,12,13]. The Ni is widely studied since it is catalytically active and cheap.…”

Section: Introductionmentioning

confidence: 99%

Dry Reforming of Methane over a Ruthenium/Carbon Nanotube Catalyst

et al. 2020

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In this study, CH4 dry reforming was demonstrated on a novel microwave-synthesized ruthenium (Ru)/carbon nanotube (CNT) catalyst. The catalyst was tested in an isothermal laboratory-packed bed reactor, with gas analysis by gas chromatography/thermal conductivity detection. The catalyst demonstrated excellent dry-reforming activity at modest temperatures (773–973 K) and pressure (3.03 × 105 Pa). Higher reaction temperatures favored increased conversion of CH4 and CO2, and increased H2/CO product ratios. Slight coke deposition, estimated by carbon balance, was observed at higher temperatures and higher feed CH4/CO2. A robust global kinetic model composed of three reversible reactions—dry reforming, reverse water gas shift, and CH4 decomposition—simulates observed outlet species concentrations and reactant conversions using this Ru/CNT catalyst over the temperature range of this study. This engineering kinetic model for the Ru/CNT catalyst predicts a somewhat higher selectivity and yield for H2, and less for CO, in comparison to previously published results for a similarly prepared Pt_Pd/CNT catalyst from our group.

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Effect of supports on the performance of Co-based catalysts in methane dry reforming

Cited by 72 publications

References 41 publications

Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process

Catalytic Activity of Nickel and Ruthenium–Nickel Catalysts Supported on SiO2, ZrO2, Al2O3, and MgAl2O4 in a Dry Reforming Process

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

Dry Reforming of Methane over a Ruthenium/Carbon Nanotube Catalyst

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