Highly Active Ce- and Mg-Promoted Ni Catalysts Supported on Cellulose-Derived Carbon for Low-Temperature CO<sub>2</sub> Methanation

Tarifa, P.; Megías‐Sayago, Cristina; Cazaña, F.; González-Martín, Miguel; Latorre, N.; Romeo, E.; Delgado, Juan J.; Μοnzόn, A.

doi:10.1021/acs.energyfuels.1c01682

Cited by 18 publications

(11 citation statements)

References 64 publications

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“…The development of catalysts for the methanation of CO 2 at low temperatures, with both high efficiency and selectivity, is still the focus of this field. A survey of the literature reveals that Co, , Ni, , Ru, ,− and Rh 31 -based catalysts allow for low-temperature catalysis, wherein Ru-based catalysts were more extensively studied and exhibited a higher catalytic activity probably due to their better durability than Ni-based catalysts and low cost compared to Rh-based catalysts …”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

Wang

Ding

et al. 2022

ACS Sustainable Chem. Eng.

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In this work, the vapor-phase methanation of CO 2 at a low temperature was achieved under the catalysis of [Ru]@P(IL n -POSS)-Cl-A (n = 2, 3, 4) hybrids, wherein the molecular low-valent Ru complexes were encapsulated into the imidazolium chloridedecorated porous poly(ionic liquid) skeleton. Mechanistic studies suggest that it follows the cascade hydrogenation of CO 2 without the formation of CO intermediates and the presence of a chloride ligand at the Ru center is crucial for [Ru]@P(IL n -POSS)-Cl-A to reach a high activity. Besides, the textural structure of [Ru]@P(IL n -POSS)-Cl-A can be adjusted by the numbers of IL units (n) in the monomer, thereby affecting the activity and catalyst durability. As such, the activity is positively correlated with the specific surface area rather than the adsorption capacity of CO 2 , and thus, [Ru]@P(IL 2 -POSS)-Cl-A provided the best TON CH4 of 81 at 160 °C. On the other hand, the high density of the IL unit in [Ru]@P(IL 4 -POSS)-Cl-A is conductive to prevent the aggregation of the active Ru species, enabling satisfactory catalyst durability. As a proof of concept, the catalytic activity could be further improved by the strategy of a molecular fence, wherein the molecular Ru sites in [Ru-NMP]@P(IL 2 -POSS)-Cl-A were highly dispersed and stabilized with Nmethylpyrrolidone.

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Section: Introductionmentioning

confidence: 99%

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

Wang

Ding

et al. 2022

ACS Sustainable Chem. Eng.

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“…In this regard, the use of vine shoots wastes and cellulose as raw materials for the preparation of carbon-based supports of metallic catalysts is being investigated in our group [24,30,33,34]. These catalysts, prepared by controlled thermal decomposition of the impregnated raw materials (e.g., argan shells) with the metallic precursors exhibited high catalytic performance due to the good dispersion of metallic nanoparticles and the controlled textural properties of the support [35][36][37]. This technique easily allows converting hierarchical structures formed by a biological process into inorganic materials with high potential for different applications due to their porous texture developed during the preparation [38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, as the natural raw resource is previously impregnated with metallic catalytic precursors, the catalyst is obtained in one step [24]. The possibility of using different raw materials and metals makes this method a very useful and versatile tool to prepare mono or multimetallic supported catalysts with a wide range of compositions [24,35,37].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen and CNT Production by Methane Cracking Using Ni–Cu and Co–Cu Catalysts Supported on Argan-Derived Carbon

et al. 2022

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The 21st century arrived with global growth of energy demand caused by population and standard of living increases. In this context, a suitable alternative to produce COx-free H2 is the catalytic decomposition of methane (CDM), which also allows for obtaining high-value-added carbonaceous nanomaterials (CNMs), such as carbon nanotubes (CNTs). This work presents the results obtained in the co-production of COx-free hydrogen and CNTs by CDM using Ni–Cu and Co–Cu catalysts supported on carbon derived from Argan (Argania spinosa) shell (ArDC). The results show that the operation at 900 °C and a feed-ratio CH4:H2 = 2 with the Ni–Cu/ArDC catalyst is the most active, producing 3.7 gC/gmetal after 2 h of reaction (equivalent to average hydrogen productivity of 0.61 g H2/gmetal∙h). The lower productivity of the Co–Cu/ArDC catalyst (1.4 gC/gmetal) could be caused by the higher proportion of small metallic NPs (<5 nm) that remain confined inside the micropores of the carbonaceous support, hindering the formation and growth of the CNTs. The TEM and Raman results indicate that the Co–Cu catalyst is able to selectively produce CNTs of high quality at temperatures below 850 °C, attaining the best results at 800 °C. The results obtained in this work also show the elevated potential of Argan residues, as a representative of other lignocellulosic raw materials, in the development of carbonaceous materials and nanomaterials of high added-value.

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“…Hydrogen from renewable energy sources is introduced to the CO 2 -saturated DFMs, causing CO 2 molecules to spill over to the catalyst site where they are converted to CH 4. The widely studied catalysts for CO 2 methanation reaction involves noble metal catalysts (Ru and Rh) and transition metal catalysts (Ni). ,− Among various alkali metal-based CO 2 adsorbents, MgO has been widely employed to fabricate DFM systems, considering that its operating temperature window for CO 2 capture (200–300 °C) and regeneration (350–450 °C) is well matched with that of CO 2 methanation. − …”

Section: Introductionmentioning

confidence: 99%

Insights into Nickel-Based Dual Function Materials for CO₂ Sorption and Methanation: Effect of Reduction Temperature

et al. 2021

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Ni-MgO dual function materials (DFMs) show promise for integrated CO2 sorption and methanation. To improve CO2 sorption capacity, Ni-MgO DFMs are promoted with alkali metal nitrates. However, the high catalyst reduction temperature will result in high energy consumption, huge temperature gap between reduction (∼650 °C) and CO2 sorption and methanation (∼300 °C), and the loss of alkali metal nitrates. In this work, we prepared a Ni/CeO2 catalyst and investigated the effect of reduction temperature on its structure–property relationships in CO2 methanation, aiming to lower the reduction temperature to an isothermal level that matches CO2 methanation. Results indicated that the reduction temperature fell from over 650 to 300 °C, and Ni/CeO2 reduced at 300 °C featured high CO2 conversion (72.7%) and CH4 selectivity (98.9%). The CO2 methanation activity of Ni/CeO2 declined significantly when the reduction temperature exceeded 400 °C. The formation of more oxygen vacancy defects due to the interaction between NiO and CeO2 promoted the reduction of NiO species at lower temperatures. The declined CO2 methanation activity at high reduction temperatures was ascribed to the consumption of oxygen vacancies in catalyst reduction, and less defects were available for CO2 activation and methanation. An alkali metal nitrate promoted MgO adsorbent was physically mixed with Ni/CeO2 to construct (Li-Na-K)NO3-MgO-Ni/CeO2-phy DFMs for integrated CO2 sorption and methanation. The DFMs could be facilely reduced at 300 °C, and this has made it possible to realize the isothermal operation of catalyst reduction and CO2 sorption and methanation in integrated CO2 capture and utilization (ICCU). The (Li-Na-K)NO3-MgO-Ni/CeO2-phy DFMs reduced at 300 °C exhibited an impressive CO2 uptake of 2.74 mmol CO2/g DFMs and a great CH4 yield of 1.10 mmol CH4/g DFMs, and they could be a promising alternative to Ru-based DFMs with respect to their comparable CO2 sorption capacity and methanation activity and minimized cost of raw materials.

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Highly Active Ce- and Mg-Promoted Ni Catalysts Supported on Cellulose-Derived Carbon for Low-Temperature CO₂ Methanation

Cited by 18 publications

References 64 publications

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

Hydrogen and CNT Production by Methane Cracking Using Ni–Cu and Co–Cu Catalysts Supported on Argan-Derived Carbon

Insights into Nickel-Based Dual Function Materials for CO₂ Sorption and Methanation: Effect of Reduction Temperature

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Highly Active Ce- and Mg-Promoted Ni Catalysts Supported on Cellulose-Derived Carbon for Low-Temperature CO2 Methanation

Cited by 18 publications

References 64 publications

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO2 under Mild Conditions

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO2 under Mild Conditions

Hydrogen and CNT Production by Methane Cracking Using Ni–Cu and Co–Cu Catalysts Supported on Argan-Derived Carbon

Insights into Nickel-Based Dual Function Materials for CO2 Sorption and Methanation: Effect of Reduction Temperature

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Highly Active Ce- and Mg-Promoted Ni Catalysts Supported on Cellulose-Derived Carbon for Low-Temperature CO₂ Methanation

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

Encapsulation of Ru Complexes into Poly(ionic liquid) Enables the Methanation of CO₂ under Mild Conditions

Insights into Nickel-Based Dual Function Materials for CO₂ Sorption and Methanation: Effect of Reduction Temperature