A perspective of lanthanide promoted Ni-catalysts for CO2 hydrogenation to methane: catalytic activity and open challenges

Spennati, Elena; Riani, Paola; Garbarino, Gabriella

doi:10.1016/j.cattod.2023.114131

Cited by 19 publications

(4 citation statements)

References 108 publications

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“…On the other hand, for decades, the use of Ni/Al 2 O 3 catalysts in several other hydrogenation processes in relevant industrial conditions has been a confirmation of the stability of this system. In fact, as reported recently by Spennati et al, commercial Ni catalysts for CO x methanation seem to be exclusively based on Ni/Al 2 O 3 [98]. This might be due to its cheapness and well-known chemistry of alumina, coupled with its commercial availability, stability in mild conditions, and versatility, which make it preferred by the industry, e.g., as hydrotreating catalysts, as reported years ago [144].…”

Section: Discussionmentioning

confidence: 97%

“…In a recent review, Spennati et al [98] emphasized the role of rare earth oxides in the composition of Ni-based catalysts for CO 2 methanation. According to the screening work of Muroyama et al [39], where pure support effect has been considered for 10 wt% Ni/oxide catalysts, Ni/Y 2 O 3 and, to a lesser extent, Ni/Sm 2 O 3 , show the highest methanation activities at 523 K, although they lose methane selectivity above 573 K in favor of CO.…”

Section: Nickel Catalysts Supported On Other Rare Earth Oxidesmentioning

confidence: 99%

“…In contrast, Cai et al [114] reported a marked promotion effect of zirconia on 12 wt% Ni/γ-Al 2 O 3 , in particular when the 3 wt% ZrO 2 /γ-Al 2 O 3 carrier was prepared by the impregnation-precipitation method. In their recent review, Spennati et al [98] emphasized the positive role of doping Ni/Al 2 O 3 with rare earth oxide components. Ahmad et al [115] reported the activity scale Pr > La > Gd > Ce > Eu for 12 wt% Ni/γ-Al 2 O 3 doped with 5 wt% rare earth metal.…”

Section: Effect Of a Second Oxide Component On Ni/γ-al 2 Omentioning

confidence: 99%

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Looking for an Optimal Composition of Nickel-Based Catalysts for CO2 Methanation

et al. 2023

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A detailed critical analysis of the scientific literature data concerning catalysts for CO2 methanation based on nickel supported over oxides was performed. According to the obtained information, it seems that an ionic support is necessary to allow a good nickel dispersion to produce very small nickel metal particles. Such small metal particles result in being very active toward methanation, limiting the production of carbonaceous materials. The use of support and/or surface additives gives rise to medium surface basicity, allowing medium-strong adsorption of CO2, and it is also advisable to increase the reaction rate. A medium nickel loading would allow the free support geometric surface to be covered densely by small nickel metal particles without the production of larger Ni crystals. It is also advisable to work at temperatures where Ni(CO)4 formation is not possible (e.g., >573 K). The promising properties of systems based on doped Ni/Al2O3, doped with basic and re-active oxides such as MnOx or/and CeO2, and those based on Ni/CeO2 were underlined.

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Section: Discussionmentioning

confidence: 97%

Section: Nickel Catalysts Supported On Other Rare Earth Oxidesmentioning

confidence: 99%

Section: Effect Of a Second Oxide Component On Ni/γ-al 2 Omentioning

confidence: 99%

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Looking for an Optimal Composition of Nickel-Based Catalysts for CO2 Methanation

et al. 2023

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“…While Cu-based catalysts have shown encouraging selectivity towards CO and CH 3 OH, their CO 2 conversion rates leave much to be desired [12,13]. On the other hand, Ni-based catalysts have demonstrated considerable catalytic conversion under mild conditions, favoring the production of CH 4 over CO and CH 3 OH [14,15]. However, CO, a crucial building block for synthetic fuels and oxygenates via Fischer-Tropsch or methanol synthesis reactions, is the more desirable product [16].…”

Section: Introductionmentioning

confidence: 99%

CO2 to Value-Added Chemicals: Synthesis and Performance of Mono- and Bimetallic Nickel–Cobalt Nanofiber Catalysts

Schossig,

Gandotra,

Arizapana

et al. 2023

Catalysts

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In an epoch dominated by escalating concerns over climate change and looming energy crises, the imperative to design highly efficient catalysts that can facilitate the sequestration and transformation of carbon dioxide (CO2) into beneficial chemicals is paramount. This research presents the successful synthesis of nanofiber catalysts, incorporating monometallic nickel (Ni) and cobalt (Co) and their bimetallic blend, NiCo, via a facile electrospinning technique, with precise control over the Ni/Co molar ratios. Application of an array of advanced analytical methods, including SEM, TGA–DSC, FTIR-ATR, XRD, Raman, XRF, and ICP-MS, validated the effective integration and homogeneous distribution of active Ni/Co catalysts within the nanofibers. The catalytic performance of these mono- and bimetallic Ni/Co nanofiber catalysts was systematically examined under ambient pressure conditions for CO2 hydrogenation reactions. The bimetallic NiCo nanofiber catalysts, specifically with a Ni/Co molar ratio of 1:2, and thermally treated at 1050 °C, demonstrated a high CO selectivity (98.5%) and a marked increase in CO2 conversion rate—up to 16.7 times that of monometallic Ni nanofiber catalyst and 10.8 times that of the monometallic Co nanofiber catalyst. This significant enhancement in catalytic performance is attributed to the improved accessibility of active sites, minimized particle size, and the strong Ni–Co–C interactions within these nanofiber structures. These nanofiber catalysts offer a unique model system that illuminates the fundamental aspects of supported catalysis and accentuates its crucial role in addressing pressing environmental challenges.

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A Specific Review of CO₂ Catalytic Conversion Reactions Based on the Concept of Catalytic Sites Contiguity

Chen,

Zhao,

Shakouri

et al. 2024

ChemCatChem

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Thermocatalytic hydrogenation of carbon dioxide (CO2) offers a promising approach to achieving net negative emissions by transforming CO2 into value‐added products like carbon monoxide (CO), methane (CH4), and methanol (MeOH). The design of catalysts plays a pivotal role in CO2 hydrogenation, particularly in configuring effective catalytic sites. In this review, we first introduce important characterization techniques for CO2 hydrogenation catalysts and discuss the identification of the catalytic sites in CO2 hydrogenation catalysts, including those for hydrogen (H2) activation, CO2 adsorption/activation, and others. We then delve into reaction systems that utilize single and/or multiple catalytic sites for processes such as the reverse water‐gas shift (RWGS), CO2 methanation, and MeOH synthesis, highlighting how the multiple‐site configurations can significantly influence catalytic activity and selectivity. Catalytic Sites Contiguity (CSC) is finally introduced to emphasize the critical relationship between the spatial arrangement of catalytic sites and the efficiency of reactant activation and conversion. Specific examples in MeOH synthesis from CO2 hydrogenation are presented to illustrate the impact of CSC on catalytic performance, offering insights into the potential for optimizing CO2 hydrogenation catalysts.

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A perspective of lanthanide promoted Ni-catalysts for CO2 hydrogenation to methane: catalytic activity and open challenges

Cited by 19 publications

References 108 publications

Looking for an Optimal Composition of Nickel-Based Catalysts for CO2 Methanation

Looking for an Optimal Composition of Nickel-Based Catalysts for CO2 Methanation

CO2 to Value-Added Chemicals: Synthesis and Performance of Mono- and Bimetallic Nickel–Cobalt Nanofiber Catalysts

A Specific Review of CO₂ Catalytic Conversion Reactions Based on the Concept of Catalytic Sites Contiguity

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A perspective of lanthanide promoted Ni-catalysts for CO2 hydrogenation to methane: catalytic activity and open challenges

Cited by 19 publications

References 108 publications

Looking for an Optimal Composition of Nickel-Based Catalysts for CO2 Methanation

Looking for an Optimal Composition of Nickel-Based Catalysts for CO2 Methanation

CO2 to Value-Added Chemicals: Synthesis and Performance of Mono- and Bimetallic Nickel–Cobalt Nanofiber Catalysts

A Specific Review of CO2 Catalytic Conversion Reactions Based on the Concept of Catalytic Sites Contiguity

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Product

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A Specific Review of CO₂ Catalytic Conversion Reactions Based on the Concept of Catalytic Sites Contiguity