Facile and efficient synthesis of ordered mesoporous MIL-53(Al)-derived Ni catalysts with improved activity in CO2 methanation

Grad, Oana; Kasza, Angela M.; Turza, Alexandru; Dan, Monica; Barbu–Tudoran, Lucian; Lazăr, Mihaela D.; Miheţ, Maria

doi:10.1016/j.jece.2023.109456

Cited by 12 publications

(2 citation statements)

References 42 publications

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“…The peak below 150 • C corresponds to weak basic sites due to CO 2 interaction with surface hydroxyl groups. The peaks observed at 150-300 • C and over 300 • C correspond to moderate and strong basic sites, resulting from CO 2 interacting with Lewis acid-base pairings and isolated/surface O 2− anions [52]. As shown in Figure 7, the CO 2 desorption temperature of RuNi/MMO-N was lower than that of RuNi/MMO-C, indicating that the CO 2 adsorption ability of RuNi/MMO-N was lower than that of RuNi/MMO-C.…”

Section: Resultsmentioning

confidence: 99%

RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases

Li,

Zhao,

et al. 2023

Catalysts

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CO selective methanation (CO-SMET) is a promising method for deep CO removal from H2-rich gases. In this study, a series of RuNi/MMO catalysts are prepared using the support MMO-N derived from NiAl-NO3-LDHs, which was prepared from NiAl-CO3-LDHs via an acid–alcohol ion-exchange reaction. The prepared catalysts were characterized by XRD, SEM, TEM, XPS, H2-TPR, CO-TPD, CO2-TPD, NH3-TPD, and TG. The RuNi/MMO-N catalyst demonstrated excellent CO-SMET performance, successfully reducing the CO to less than 10 ppm with a selectivity greater than 50% in a reaction temperature window ranging from 180 °C to 260 °C. Compared with similar catalysts derived from NiAl-CO3-LDHs, the exceptional CO-SMET capability of the RuNi/MMO-N catalyst is suggested to be associated with a more effective hydrogen spillover, a larger number of electron-rich Ni sites, and a higher density of acid sites on the surface of RuNi/MMO-N, which are conducive to CO adsorption and the inhibition of CO2 methanation.

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Section: Resultsmentioning

confidence: 99%

RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases

Li,

Zhao,

et al. 2023

Catalysts

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“…The nature of supports significantly affects the performance of Ni-based catalysts, as it impacts the dispersion of the active phase, the metal–support interaction, , or the CO 2 activation, which is directly related to the basicity of the supports. , As a result, the supports play multiple roles in the reaction, contributing to the activation of H 2 and CO 2 . Halloysite nanotubes (HNTs) are a naturally hollow-structured aluminosilicate material with chemical formula [Al 2 (OH) 4 Si 2 O· n H 2 O] .…”

Section: Introductionmentioning

confidence: 99%

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Yang,

Jin,

et al. 2024

Ind. Eng. Chem. Res.

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Hydrogenation of CO 2 into high value-added methane has received increasing attention as one of the most effective ways to reduce CO 2 emissions in the atmosphere and alleviate the energy crisis. However, improving the catalytic performance of Ni-based catalysts at low temperatures is still the focus of research at the present. Herein, a series of Ni-based catalysts supported on halloysite nanotubes (HNTs) pretreated with NaOH solution were prepared through a simple impregnation method. The optimized catalyst Ni/1.0Na-HNTs demonstrate exceptional catalytic activity, achieving CO 2 conversion of 82.3% and CH 4 selectivity of 97.3% at a low temperature of 300 °C. The characterization results show that NaOH pretreatment can increase the defective sites on the support surface and successfully introduce the alkali metal (sodium), resulting in highly dispersed metal nanoparticles and increased capacity for H 2 dissociation and CO 2 activation, which is critical in CO 2 methanation. Additionally, in situ DRIFTS analysis reveals that the reaction path for CO 2 methanation in this work follows both the formate route and the CO route.

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Metal-organic framework-derived base catalyst for conversion of dimethyl carbonate to glycerol carbonate

Tran,

Senthil Raja,

Lee

et al. 2024

Applied Catalysis A: General

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Facile and efficient synthesis of ordered mesoporous MIL-53(Al)-derived Ni catalysts with improved activity in CO2 methanation

Cited by 12 publications

References 42 publications

RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases

RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases

Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Metal-organic framework-derived base catalyst for conversion of dimethyl carbonate to glycerol carbonate

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Facile and efficient synthesis of ordered mesoporous MIL-53(Al)-derived Ni catalysts with improved activity in CO2 methanation

Cited by 12 publications

References 42 publications

RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases

RuNi/MMO Catalysts Derived from a NiAl-NO3-LDH Precursor for CO Selective Methanation in H2-Rich Gases

Enhanced CO2 Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH

Metal-organic framework-derived base catalyst for conversion of dimethyl carbonate to glycerol carbonate

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Enhanced CO₂ Methanation over Ni/Na-HNTs: Effect of Pretreatment with NaOH