Mechanochemical activation of catalysts for CO2 methanation

Mori, Sadayuki; Xu, Wei; Ishidzuki, T.; Ogasawara, Nagahiro; Imai, Jun; Kobayashi, Kimihiro

doi:10.1016/0926-860x(95)00319-3

Cited by 72 publications

(53 citation statements)

References 13 publications

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“…The experimental results fully confirm the predictions from the computational screening. On the other hand, Ni-Fe alloys, also tested for CO2 methanation, have not shown results concordant with those here discussed [219,220]. This, in our opinion, could be due to the different operational conditions adopted in the investigations.…”

Section: Nickel-iron-based Catalystscontrasting

confidence: 50%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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CO 2 methanation is a well-known reaction that is of interest as a capture and storage (CCS) process and as a renewable energy storage system based on a power-to-gas conversion process by substitute or synthetic natural gas (SNG) production. Integrating water electrolysis and CO 2 methanation is a highly effective way to store energy produced by renewables sources. The conversion of electricity into methane takes place via two steps: hydrogen is produced by electrolysis and converted to methane by CO 2 methanation. The effectiveness and efficiency of power-to-gas plants strongly depend on the CO 2 methanation process. For this reason, research on CO 2 methanation has intensified over the last 10 years. The rise of active, selective, and stable catalysts is the core of the CO 2 methanation process. Novel, heterogeneous catalysts have been tested and tuned such that the CO 2 methanation process increases their productivity. The present work aims to give a critical overview of CO 2 methanation catalyst production and research carried out in the last 50 years. The fundamentals of reaction mechanism, catalyst deactivation, and catalyst promoters, as well as a discussion of current and future developments in CO 2 methanation, are also included.

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Section: Nickel-iron-based Catalystscontrasting

confidence: 50%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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“…In consideration of this it is necessary to expect higher reactivity in the point defects; the energy accumulated in them increases the thermodynamic potential of the catalyst, thereby facilitating the overcoming of the activation barrier. The last fact obviously explains the substantial decrease of the activation energy for the hydrogenation of carbon dioxide to methane at the mechanically activated catalyst Ru-MgO observed, for example, in [70]. We note also that the increase in the free energy of the solid reagents as a result of the accumulation of mechanical energy in them makes it possible to conduct thermodynamically forbidden processes, such as the oxidation of gold to Au 2 O 3 by carbon dioxide, under the conditions of mechanical activation [130].…”

Section: The Nature Of the Active Centers Generated By Mechanical Actmentioning

confidence: 94%

“…Mechanical treatment of a mixed catalyst MgO-M (M = Ru, Ni, Fe or combinations of these metals) in an atmosphere of CO 2 (100 torr) and H 2 (500 torr) leads [70] to the hydrogenation of carbon dioxide to methane at 80-150°C. The magnesium oxide here can play the role of base [71], firmly bonding the carbon dioxide to the surface (e.g., in the form of MgCO 3 ), and the carbon dioxide is then reduced to methane by the metal hydrides formed during the mechanical treatment.…”

Section: Metal Catalysts and Mixed Metal-oxide Catalystsmentioning

confidence: 99%

Mechanochemistry in heterogeneous catalysis

Митченко

2007

Theor Exp Chem

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“…MC catalyst activation has been successfully applied for many years. Mori et al [112] investigated the influence of the mechanical milling of MgO-mixed catalysts of Ru, Ni, Fe, or their combinations at temperatures ranging from 80 to 150 °C under initial pressures of 100 Torr CO2 and 500 Torr H2 on the hydrogenation of CO2 to CH4. They found that the CH4 yield was related to the nature of the catalyst (Ru/MgO gave the best yield, whilst Ni/Fe showed the worst activity).…”

Section: As a Tool For The Synthesis Of Catalystsmentioning

confidence: 99%

Microwave, Ultrasound, and Mechanochemistry: Unconventional Tools that Are Used to Obtain “Smart” Catalysts for CO2 Hydrogenation

Manzoli

Bonelli

2018

Catalysts

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Abstract:The most recent progress obtained through the precise use of enabling technologies, namely microwave, ultrasound, and mechanochemistry, described in the literature for obtaining improved performance catalysts (and photocatalysts) for CO 2 hydrogenation, are reviewed. In particular, the main advantages (and drawbacks) found in using the proposed methodologies will be discussed and compared by focusing on catalyst design and optimization of clean and efficient (green) synthetic processes. The role of microwaves as a possible activation tool used to improve the reaction yield will also be considered.

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Mechanochemical activation of catalysts for CO2 methanation

Cited by 72 publications

References 13 publications

Supported Catalysts for CO2 Methanation: A Review

Supported Catalysts for CO2 Methanation: A Review

Mechanochemistry in heterogeneous catalysis

Microwave, Ultrasound, and Mechanochemistry: Unconventional Tools that Are Used to Obtain “Smart” Catalysts for CO2 Hydrogenation

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