MIL-101-Al2O3 as catalytic support in the methanation of CO2 – Comparative study between Ni/MIL-101 and Ni/MIL-101-Al2O3 catalysts

Grad, Oana; Miheţ, Maria; Blăniţă, Gabriela; Dan, Monica; Barbu–Tudoran, Lucian; Lazăr, Mihaela D.

doi:10.1016/j.cattod.2020.05.003

Cited by 15 publications

(15 citation statements)

References 31 publications

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Section: Structural Characteristics Of Catalystsmentioning

confidence: 64%

“…As previously reported, in the attempt of immobilizing MIL-101 on alumina particles starting from the synthesis procedure of MIL-101, it was noticed that the equimolar mixture of BDC and CrCl 3 (220 • C, 24 h) results in a mixture of both MIL-101 and MIL-53 covering the alumina particles introduced in the reaction pot [45]. Thus, the synthesis procedure was modified with the goal to obtain either MIL-101 or MIL-53 on the alumina particles, giving MIL-101-Al 2 O 3 [45] 1). This observation is in agreement with previous reports related to the encapsulation of metal nanoparticles inside the pores of different MOFs or MOF-based composites: Pd(5 wt.%)/MIL-101 [50], Ni(10 wt.%)/MIL-101 [28,45], Ni(20 wt.%)/UiO-66 [29], or Ni(10 wt.%)/MIL-101-Al 2 O 3 [45].…”

Section: Structural Characteristics Of Catalystsmentioning

confidence: 64%

“…Following our experience in the methanation of CO 2 , either on alumina-supported Ni catalysts [15] or on MOF-based catalysts [28,30], we aimed to shape MOFs in order to obtain more stable MOF-based catalytic supports [45]. Thus, in our quest for shaping MOFs by crystallization on preformed structures, MIL-101 was first chosen to be immobilized on alumina pellets due to its large surface area and its interesting mesoporous structure given by the two types of cavities (2.9 and 3.4 nm), which can be accessed through apertures of 1.2 and 1.6 nm width [46].…”

Section: Introductionmentioning

confidence: 99%

“…If MIL-101 and more so the composite material MIL-101-Al 2 O 3 , obtained by immobilization on alumina, proved their efficiency as catalytic supports in the methanation of CO 2 [28,45], what is the case for their MIL-53 homologues? Since MIL-53 is known for its CO 2 adsorption capacity even in its hydrated form [48,49], and considering that it is generally accepted that the support plays an important role in the activation and dissociation of CO 2 during the methanation process [8], MIL-53-based catalytic supports could be an interesting choice for this reaction.…”

Section: Introductionmentioning

confidence: 99%

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Methanation of CO2 Using MIL-53-Based Catalysts: Ni/MIL-53–Al2O3 versus Ni/MIL-53

et al. 2021

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MIL-53 and the MIL-53–Al2O3 composite synthesized by a solvothermal procedure, with water as the only solvent besides CrCl3 and benzene-1,4-dicarboxylic acid (BDC), were used as catalytic supports to obtain the novel MIL-53-based catalysts Ni(10 wt.%)/MIL-53 and Ni(10 wt.%)/MIL-53–Al2O3. Ni nanoparticle deposition by an adapted double-solvent method leads to the uniform distribution of metallic particles, both smaller (≤10 nm) and larger ones (10–30 nm). MIL-53–Al2O3 and Ni/MIL-53–Al2O3 show superior thermal stability to MIL-53 and Ni/MIL-53, while MIL-53–Al2O3 samples combine the features of both MIL-53 and alumina in terms of porosity. The investigation of temperature’s effect on the catalytic performance in the methanation process (CO2:H2 = 1:5.2, GHSV = 4650 h−1) revealed that Ni/MIL-53 is more active at temperatures below 300 °C, and Ni/MIL-53–Al2O3 above 300 °C. Both catalysts show maximum CO2 conversion at 350 °C: 75.5% for Ni/MIL-53 (methane selectivity of 93%) and 88.8% for Ni/MIL-53–Al2O3 (methane selectivity of 98%). Stability tests performed at 280 °C prove that Ni/MIL-53–Al2O3 is a possible candidate for the CO2 methanation process due to its high CO2 conversion and CH4 selectivity, corroborated by the preservation of the structure and crystallinity of MIL-53 after prolonged exposure in the reaction medium.

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Section: Structural Characteristics Of Catalystsmentioning

confidence: 64%

Section: Structural Characteristics Of Catalystsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Methanation of CO2 Using MIL-53-Based Catalysts: Ni/MIL-53–Al2O3 versus Ni/MIL-53

et al. 2021

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“…3c). In supported Ni catalysts, the metallic Ni dissociates the H2-molecule into H-atoms on the surface of the catalyst then the dissociated H-atoms are moved to active CO2 molecule which is adsorbed on the support to form CH4 [30].…”

Section: Ceo2 Supported Ni Catalystsmentioning

confidence: 99%

Role of active metals Cu, Co, and Ni on ceria towards CO2 thermo-catalytic hydrogenation

Bali

Mutyala

Efremova

et al. 2021

Reac Kinet Mech Cat

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A series of CeO2 supported Cu, Co, and Ni catalysts have been synthesized by the wetimpregnation method for CO2 thermo-catalytic hydrogenation from 200 -400 °C in the fixed bed reactor. All catalysts were characterized by XRD, N2-isotherms, and H2 temperature-programmed reduction. XRD results have suggested that the incorporated Cu, Co, and Ni have uniformly distributed on the CeO2 surface, N2-isotherm analysis confirmed that the pores of CeO2 were blocked by incorporated metals and H2-TPR indicated strong interaction between active metal and CeO2. The CO2 consumption rate and product selectivity depend on the type of active metal on CeO2 and reaction temperature. The order of CO2 consumption rate for 5wt% catalysts was 5Ni/CeO2 > 5Co/CeO2 > 5Cu/CeO2 at 400 °C. The high CO2 consumption rate for 5Ni/CeO2 was attributed to the presence of more number of active metallic Ni during the reaction which dissociated H2 molecule to H-atoms. The formed H-atoms reacted with active CO2 molecule and formed CH4 with 100% selectivity.

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Hydrogen to Methane—An Important Step in the Power-to-Gas Concept

Lazăr¹,

Miheţ²,

Dan³

2022

Comprehensive Renewable Energy

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MIL-101-Al2O3 as catalytic support in the methanation of CO2 – Comparative study between Ni/MIL-101 and Ni/MIL-101-Al2O3 catalysts

Cited by 15 publications

References 31 publications

Methanation of CO2 Using MIL-53-Based Catalysts: Ni/MIL-53–Al2O3 versus Ni/MIL-53

Methanation of CO2 Using MIL-53-Based Catalysts: Ni/MIL-53–Al2O3 versus Ni/MIL-53

Role of active metals Cu, Co, and Ni on ceria towards CO2 thermo-catalytic hydrogenation

Hydrogen to Methane—An Important Step in the Power-to-Gas Concept

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