Compositional dependence of the CO2 methanation activity of Ni/ZrO2 catalysts prepared from amorphous Ni Zr alloy precursors

Yamasaki, Michiaki; Habazaki, H.; Yoshida, Takeshi; Akiyama, Eiji; Kawashima, A.; Asami, K.; Hashimoto, Kôji; Komori, M.; Shimamura, Kazuo

doi:10.1016/s0926-860x(97)00142-7

Cited by 68 publications

(35 citation statements)

References 24 publications

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“…Polymorphs of ZrO 2 greatly influence their catalytic properties. For CO 2 methanation, Ni/t-ZrO 2 prepared from amorphous Ni-Zr alloys exhibits very high activity and almost 100% selectivity to methane at 200-300 • C [144,145]. It has been demonstrated that the catalytic activity increases with the amount of t-ZrO 2 [144,146], achieving the maximum methanation rate at 300 • C with a catalyst prepared from amorphous alloy precursors.…”

Section: Silica-supported Nickelmentioning

confidence: 99%

“…For CO 2 methanation, Ni/t-ZrO 2 prepared from amorphous Ni-Zr alloys exhibits very high activity and almost 100% selectivity to methane at 200-300 • C [144,145]. It has been demonstrated that the catalytic activity increases with the amount of t-ZrO 2 [144,146], achieving the maximum methanation rate at 300 • C with a catalyst prepared from amorphous alloy precursors. The catalytic activity can be significantly enhanced on Ni/ZrO 2 catalysts prepared by Ni/Zr/earth elements alloys [147][148][149][150].…”

Section: Silica-supported Nickelmentioning

confidence: 99%

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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: Silica-supported Nickelmentioning

confidence: 99%

Section: Silica-supported Nickelmentioning

confidence: 99%

Supported Catalysts for CO2 Methanation: A Review

et al. 2017

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“…Thus, using a highly efficient catalyst is required to fully exploit the potential of the Sabatier reaction. Most of the research conducted in this field has dealt with the use of Ni-based catalysts [3,4,[7][8][9][10][11], although other transition (e.g., Fe and Co) [9,12] and noble (e.g., Rh, Pt, Ru and Pd) [12][13][14][15][16] metal based systems have also proven active.…”

Section: Introductionmentioning

confidence: 99%

An Alumina-Supported Ni-La-Based Catalyst for Producing Synthetic Natural Gas

et al. 2016

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LaNi 5 , known for its hydrogen storage capability, was adapted to the form of a metal oxide-supported (γ-Al 2 O 3 ) catalyst and its performance for the Sabatier reaction assessed. The 20 wt % La-Ni/γ-Al 2 O 3 particles were prepared via solution combustion synthesis (SCS) and exhibited good catalytic activity, achieving a CO 2 conversion of 75% with a high CH 4 selectivity (98%) at 1 atm and 300 • C. Characteristics of the La-Ni/γ-Al 2 O 3 catalyst were identified at various stages of the catalytic process (as-prepared, activated, and post-reaction) and in-situ DRIFTS was used to probe the reaction mechanism. The as-prepared catalyst contained amorphous surface La-Ni spinels with particle sizes <6 nm. The reduction process altered the catalyst make-up where, despite the reducing conditions, Ni 2+ -based particles with diameters between 4 and 20 nm decorated with LaO x moieties were produced. However, the post-reaction catalyst had particle sizes of 4-9 nm and comprised metallic Ni, with the LaO x decoration reverting to a form akin to the as-prepared catalyst. DRIFTS analysis indicated that formates and adsorbed CO species were present on the catalyst surface during the reaction, implying the reaction proceeded via a H 2 -assisted and sequential CO 2 dissociation to C and O. These were then rapidly hydrogenated into CH 4 and H 2 O.

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“…of around 200°C to 300°C for the catalytic reaction, the thermodynamically stable phase of ZrO 2 is monoclinic, but a considerable fraction of tetragonal ZrO 2 has been found from the amorphous Ni-Zr precursor, and Ni supported by tetragonal ZrO 2 has possessed a high catalytic function [14]. The tetragonal ZrO 2 has been identified as the double oxide in which Ni 2+ ions have also been included during the formation of a ZrO 2 lattice by the oxidation of zirconium in the Ni-Zr alloys while occupying the lattice points of Zr 4+ in the ZrO 2 lattice.…”

Section: Methanation Of Carbon Dioxidementioning

confidence: 99%

The production of renewable energy in the form of methane using electrolytic hydrogen generation

et al. 2014

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An extrapolation of the world energy consumption from 1990 to 2010 indicates a complete exhaustion of the world reserves of oil, natural gas, uranium, and coal by 2043, 2047, 2051, and 2055, respectively. For the survival of all people in the whole world, intermittent and fluctuating electricity generated from renewable energy should be supplied in the form of usable fuel. We have been working on research and development of global CO 2 recycling for the use of renewable energy produced via electrolytic hydrogen generation in the form of methane. We created energy-saving cathodes for H 2 production, anodes for O 2 evolution without chlorine formation in seawater electrolysis, and catalysts for methanation of CO 2 by the reaction with H 2 , and built pilot plants on an industrial scale. The development of new anode and cathode for alkali water electrolysis, the improvement of the anode for seawater electrolysis and the catalysts for CO 2 methanation, as well as industrial applications are in progress.

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Compositional dependence of the CO2 methanation activity of Ni/ZrO2 catalysts prepared from amorphous Ni Zr alloy precursors

Cited by 68 publications

References 24 publications

Supported Catalysts for CO2 Methanation: A Review

Supported Catalysts for CO2 Methanation: A Review

An Alumina-Supported Ni-La-Based Catalyst for Producing Synthetic Natural Gas

The production of renewable energy in the form of methane using electrolytic hydrogen generation

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