Co-Precipitated Ni-Mg-Al Hydrotalcite-Derived Catalyst Promoted with Vanadium for CO2 Methanation

Summa, Paulina; Świrk, Katarzyna; Wierzbicki, Dominik; Motak, Monika; Alxneit, Ivo; Rønning, Magnus; Costa, Patrick Da

doi:10.3390/molecules26216506

Cited by 14 publications

(11 citation statements)

References 48 publications

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“…In addition to the metallic nanoparticle-supported oxides, nickel-based double-layered hydroxides (LDHs) have shown excellent catalytic performances towards DRM reaction [27][28][29][30]. Modification of double-layered hydroxides with Y, Zr, and Ce as dopants or promotors significantly improves CH 4 and CO 2 conversions, lowers carbon deposition, and limits side reactions [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

et al. 2022

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The transition metal-based catalysts for the elimination of greenhouse gases via methane reforming using carbon dioxide are directly or indirectly associated with their distinguishing characteristics such as well-dispersed metal nanoparticles, a higher number of reducible species, suitable metal–support interaction, and high specific surface area. This work presents the insight into catalytic performance as well as catalyst stability of CexSr1−xNiO3 (x = 0.6–1) nanocrystalline perovskites for the production of hydrogen via methane reforming using carbon dioxide. Strontium incorporation enhances specific surface area, the number of reducible species, and nickel dispersion. The catalytic performance results show that CeNiO3 demonstrated higher initial CH4 (54.3%) and CO2 (64.8%) conversions, which dropped down to 13.1 and 19.2% (CH4 conversions) and 26.3 and 32.5% (CO2 conversions) for Ce0.8Sr0.2NiO3 and Ce0.6Sr0.4NiO3, respectively. This drop in catalytic conversions post strontium addition is concomitant with strontium carbonate covering nickel active sites. Moreover, from the durability results, it is obvious that CeNiO3 exhibited deactivation, whereas no deactivation was observed for Ce0.8Sr0.2NiO3 and Ce0.6Sr0.4NiO3. Carbon deposition during the reaction is mainly responsible for catalyst deactivation, and this is further established by characterizing spent catalysts.

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Section: Introductionmentioning

confidence: 99%

The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

et al. 2022

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“…According to relevant researches, promoters can modify the coordination sphere of the active metal or influence the reaction path to improve catalytic performance. Some promoters such as Ce, [17,18] Zr, [19,20] V, [21,22] Mn, [5,23] and Ti [24,25] have been widely used for adding Ni-based catalysts for CO 2 methanation. In particular, it was revealed that Ti could significantly facilitate the active metal dispersion and inhibit sintering of the catalyst.…”

Section: Introductionmentioning

confidence: 99%

Promotion Effect of TiO₂ on Ni/SiO₂ Catalysts Prepared by Hydrothermal Method for CO₂ Methanation

Zhang

2023

Energy Tech

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Herein, the effects of TiO2 addition and different preparation methods on catalyst structure and CO2 methanation activity of Ni/SiO2 catalysts are investigated. Compared with wetness impregnation and sol–gel method, hydrothermal method is demonstrated to be a more efficient means for preparing Ni/SiO2 catalysts with more suitable pore structure, more active sites on the catalyst surface, and better catalytic performance. Ni/SiO2 catalysts with different TiO2 concentrations are synthesized by hydrothermal method for comparison with those without TiO2 introduced. The results show that TiO2‐promoted Ni/SiO2‐HS‐xTi exhibits higher activity and CH4 selectivity. Among this group, the Ni/SiO2‐HS‐2Ti catalyst performs the best, achieving 53.2% CO2 conversion at 350 ºC, 0.1 MPa, and WHSV of 45 000 mL g−1 h−1. The conclusions of the characterization analysis indicate that TiO2 effectively promotes the Ni dispersion on the SiO2 surface while reducing Ni particle size. In addition, TiO2 increases the amount of weak basic sites on the SiO2 surface and the electron cloud density around the active metal Ni, which facilitates the CO2 adsorption and activation.

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“…However, it is kinetically hindered due to the intrinsic feature of an eight-electron reduction process. , As a result, the reaction is usually carried out at high temperatures (>300 °C), which is thus accompanied by the endothermic RWGSR as a side reaction . Many kinds of catalysts have been developed based on Co, , Ni, − Ru, , Rh, , and Pd. , Mechanistic studies indicate that there are two pathways for the methanation of CO 2 , including (a) the conversion of CO 2 to CO by the RWGSR process, followed by hydrogenative methanation of CO and (b) the cascade hydrogenation of CO 2 with the formation of formate as the intermediate . 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.…”

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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Co-Precipitated Ni-Mg-Al Hydrotalcite-Derived Catalyst Promoted with Vanadium for CO2 Methanation

Cited by 14 publications

References 48 publications

The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

Promotion Effect of TiO₂ on Ni/SiO₂ Catalysts Prepared by Hydrothermal Method for CO₂ Methanation

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

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Co-Precipitated Ni-Mg-Al Hydrotalcite-Derived Catalyst Promoted with Vanadium for CO2 Methanation

Cited by 14 publications

References 48 publications

The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

The Role of Strontium in CeNiO3 Nano-Crystalline Perovskites for Greenhouse Gas Mitigation to Produce Syngas

Promotion Effect of TiO2 on Ni/SiO2 Catalysts Prepared by Hydrothermal Method for CO2 Methanation

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

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Product

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Promotion Effect of TiO₂ on Ni/SiO₂ Catalysts Prepared by Hydrothermal Method for CO₂ Methanation

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