A Short Review on the Catalytic Activity of Hydrotalcite-Derived Materials for Dry Reforming of Methane

Dębek, Radosław; Motak, Monika; Grzybek, Teresa; Gálvez, María Elena; Costa, Patrick Da

doi:10.3390/catal7010032

Cited by 113 publications

(49 citation statements)

References 90 publications

(150 reference statements)

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“…x+ (A n− ) x/n •mH 2 O, where M II and M III are divalent and trivalent cations of metals, respectively, A n− is an n-valent anion and m is the number of molecular water [6,7]. In this structure, the Mg 2+ cations are partially substituted by Al 3+ cations resulting in a positive charge.…”

Section: Introductionmentioning

confidence: 99%

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

et al. 2019

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Ce- and Y-promoted double-layered hydroxides were synthesized and tested in dry reforming of methane (CH4/CO2 = 1/1). The characterization of the catalysts was performed using X-ray fluorescence (XRF), X-ray diffraction (XRD), N2 sorption, temperature-programmed reduction in H2 (TPR-H2), temperature-programmed desorption of CO2 (TPD-CO2), H2 chemisorption, thermogravimetric analysis coupled by mass spectrometry (TGA/MS), Raman, and high-resolution transmission electron microscopy (HRTEM). The promotion with cerium influences textural properties, improves the Ni dispersion, decreases the number of total basic sites, and increases the reduction temperature of nickel species. After promotion with yttrium, the increase in basicity is not directly correlated with the increasing Y loading on the contrary of Ni dispersion. Dry reforming of methane (DRM) was performed as a function of temperature and in isothermal conditions at 700 °C for 5 h. For catalytic tests, a slight increase of the activity is observed for both Y and Ce doped catalysts. This improvement can of course be explained by Ni dispersion, which was found higher for both Y and Ce promoted catalysts. During DRM, the H2/CO ratio was found below unity, which can be explained by side reactions occurrence. These side reactions are linked with the increase of CO2 conversion and led to carbon deposition. By HRTEM, only multi-walled and helical-shaped carbon nanotubes were identified on Y and Ce promoted catalysts. Finally, from Raman spectroscopy, it was found that on Y and Ce promoted catalysts, the formed C is less graphitic as compared to only Ce-based catalyst.

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Section: Introductionmentioning

confidence: 99%

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

et al. 2019

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“…Thermodynamic modelling demonstrated that theoretically H2 could be produced at about 100 º C and CO at about 300 º C by the low-temperature activation of CH4 and CO2 66 shifted their study to focus on nickel-based catalysts by choosing different support and doping different promoters to enhance its catalytic performance 67, [73][74][75][76] . Table 3 summarizes the recently reported Ni-based catalysts at temperatures below 500 º C. It can be seen that the lowest operating temperature was 400 º C, but poorer CH4 and CO2 conversions were achieved compared to those experiments carried out at high temperatures,…”

Section: Dry Reforming Of Methanementioning

confidence: 99%

Catalytic Conversion of Methane at Low Temperatures: A Critical Review

Chen

Luo

et al. 2019

Energy Tech

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The current study reviews the recent development in the direct conversion of methane into syngas, methanol, light olefins, and aromatic compounds. For syngas production, nickelbased catalysts are considered as a good choice. Methane conversion (84%) is achieved with nearly no coke formation when the 7% Ni-1%Au/Al2O3 catalyst is used in the steam reforming of methane (SRM), whereas for dry reforming of methane (DRM), a methane conversion of 17.9% and CO2 conversion of 23.1% are found for 10%Ni/ZrOxMnOx/SiO2 operated at 500 o C. The progress of direct conversion of methane to methanol is also summarized with an insight into its selectivity and/or conversion, which shows that in liquid-phase heterogeneous systems, high selectivity (>80%) can be achieved at 50 o C, but the conversion is low. The latest development of nonoxidative coupling of methane (NOCM) and oxidative coupling of methane (OCM) for the production of olefins is also reviewed. The Mn2O3-TiO2-Na2WO4/SiO2 catalyst is reported to show the high C2 yield (22%) and a high selectivity toward C2 (62%) during the OCM at 650 o C. For NOCM, 98% selectivity of ethane can be achieved when a tantalum hydride catalyst supported on silica is used. In addition, the Mo-based catalysts are the most suitable for the preparation of aromatic compounds from methane.

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“…It was found that the RDS is H 2 O + *O → *OOH + H + + e − , but that the RDS and the overpotential are dependent on the doping metal, which opens the possibility of improved doped nickel layered hydroxide OER catalysts. Other reviewed fields in which HTs are used as catalysts are biodiesel production, where their base properties are used, H 2 production, nitrogen oxide abatement, catalytic oxidation of alcohols, dry reforming of methane and other reactions relevant for the environment protection . It should be noted, however, that the HT is often used just as the precursor of the effective catalyst.…”

Section: D Nanostructured Oxide Filmsmentioning

confidence: 99%

2D Oxide Nanomaterials to Address the Energy Transition and Catalysis

et al. 2018

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2D oxide nanomaterials constitute a broad range of materials, with a wide array of current and potential applications, particularly in the fields of energy storage and catalysis for sustainable energy production. Despite the many similarities in structure, composition, and synthetic methods and uses, the current literature on layered oxides is diverse and disconnected. A number of reviews can be found in the literature, but they are mostly focused on one of the particular subclasses of 2D oxides. This review attempts to bridge the knowledge gap between individual layered oxide types by summarizing recent developments in all important 2D oxide systems including supported ultrathin oxide films, layered clays and double hydroxides, layered perovskites, and novel 2D-zeolite-based materials. Particular attention is paid to the underlying similarities and differences between the various materials, and the subsequent challenges faced by each research community. The potential of layered oxides toward future applications is critically evaluated, especially in the areas of electrocatalysis and photocatalysis, biomass conversion, and fine chemical synthesis. Attention is also paid to corresponding novel 3D materials that can be obtained via sophisticated engineering of 2D oxides.

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A Short Review on the Catalytic Activity of Hydrotalcite-Derived Materials for Dry Reforming of Methane

Cited by 113 publications

References 90 publications

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

Ce- and Y-Modified Double-Layered Hydroxides as Catalysts for Dry Reforming of Methane: On the Effect of Yttrium Promotion

Catalytic Conversion of Methane at Low Temperatures: A Critical Review

2D Oxide Nanomaterials to Address the Energy Transition and Catalysis

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