Promotion of unsupported nickel catalyst using iron for CO2 methanation

Pandey, D. S.; Ray, K.K.; Bhardwaj, Rahul; Sreedhar, B.; Chary, Komandur V. R.; Deo, Goutam

doi:10.1016/j.ijhydene.2018.01.144

Cited by 67 publications

(33 citation statements)

References 66 publications

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“…In fact, recent studies demonstrate that Ni-Fe catalysts show both a high CO 2 methanation activity and an improved long-term stability, even under dynamic conditions. [20][21][22][23][24][25] Surprisingly, recent studies reported that nickel remains mainly reduced while iron seems to be oxidized during CO 2 methanation, which contradicts other studies and requires modifications in the assumptions made in computational screenings. [26][27][28][29] Various additional hypotheses are thus reported concerning the role of iron on enhanced CO 2 activation, e.g.…”

Section: Introductionmentioning

confidence: 93%

Structural dynamics in Ni–Fe catalysts during CO₂ methanation – role of iron oxide clusters

Serrer

Gaur

Jelic

et al. 2020

Catal. Sci. Technol.

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Section: Introductionmentioning

confidence: 93%

Structural dynamics in Ni–Fe catalysts during CO₂ methanation – role of iron oxide clusters

Serrer

Gaur

Jelic

et al. 2020

Catal. Sci. Technol.

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“…CO 2 methanation can reach 99 % CH 4 selectivity through the use of appropriate catalysts, avoiding the subsequent product separation and overcoming the difficulty of dispersed product distribution. [19] The most studied noble and nonnoble metalbased catalysts for CO 2 methanation are Ni, [100][101][102] Ru, [103][104][105] Rh, [106,107] Pd, [108,109] Co, [110,111] Fe, [112,113] Cu, [114,115] Pt, [116] Ag [39] and Au [39] catalysts from which the most important role to methanation process has Ru, Fe, Ni, and Co. [39,117] According to the various studies the activity performance and selectivity of different metal-based catalysts decreases in the following order: [118] Ni and Ru are reported to have maximum activity and stability. [119] Ni based catalysts are very effective due to the presence of easily transferable electrons in the frontier d orbitals and therefore are the most efficient and active catalytic system together with alumina as a support that may be applied on industrial scale.…”

Section: Challenges In Catalytic Co 2 Methanationmentioning

confidence: 99%

Section: Current Understanding Of Co2 Catalytic Hydrogenationmentioning

confidence: 99%

Recent Developments in the Modelling of Heterogeneous Catalysts for CO₂ Conversion to Chemicals

et al. 2020

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Density functional theory (DFT) of the CO2 behavior on the catalyst surface provides valuable insights about the C=O bond activation, information about adsorption and dissociation of CO2, understanding the elementary steps involved in the mechanism of the CO2 hydrogenation reaction. Nowadays, DFT computational studies for the catalytic hydrogenation of CO2 are becoming very popular. Therefore, this article is focused on a comprehensive review of the DFT studies in thermocatalytic hydrogenation of CO2 at the gas‐surface interface and discusses three aspects: 1) processes taking place on the surfaces and facets of transition metal heterogeneous catalysts, 2) adsorption of CO2 on surfaces of different transition metals; 3) current understanding of reaction mechanisms taking place on the catalytic surface for the production of different compounds. A detailed schematic overview of the possible CO2 hydrogenation mechanisms and DFT simulations presented here will enhance the current understanding of the CO2 catalytic hydrogenation.

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“…This indicated that the metallic Ni particles on the N 1 Z 3 -500 catalyst surface facilitated methanation 97,98 , and the formation of the Ni-Zn alloy suppressed the methanation reaction. Second, the formation of CO Fig.…”

Section: Resultsmentioning

confidence: 97%

Synthesis of monocarboxylic acids via direct CO2 conversion over Ni–Zn alloy catalysts

Sibi

Verma

Setiyadi

et al. 2020

Preprint

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The direct conversion of CO2 to methane, gasoline-to-diesel range fuels, methanol, and light olefins using renewable electricity sources is considered a promising approach for mitigating global warming. Nevertheless, the direct conversion of CO2 to high value-added chemicals, such as acetic and propanoic acids (AA and PA, respectively), has not been explored to date. Herein, we report a Ni–Zn alloy/Zn-rich NixZnyO catalyst that directly converted CO2 to AA and PA with an overall selectivity of 77.1% at a CO2 conversion of 13.4% at 325 °C. The surface restructuring of the ZnO and NiO phases during calcination and subsequent reduction led to the formation of a Ni–Zn alloy on the Zn-rich NixZnyO phase. Surface-adsorbed (*CHx)n species were formed via the reverse water-gas shift reaction and subsequent CO hydrogenation. Afterward, monocarboxylic acids were produced via the direct insertion of CO2 into the (*CHx)n species and subsequent hydrogenation. The synthesis of monocarboxylic acid was highly stable up to 216 h on-stream over the Ni–Zn alloy catalyst, and the catalyst maintained its phase structure and morphology during long-term CO2 hydrogenation. The high selectivity toward monocarboxylic acids and high stability of the Ni–Zn alloy demonstrated its excellent potential for the conversion of CO2 into value-added chemicals.

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Promotion of unsupported nickel catalyst using iron for CO2 methanation

Cited by 67 publications

References 66 publications

Structural dynamics in Ni–Fe catalysts during CO₂ methanation – role of iron oxide clusters

Structural dynamics in Ni–Fe catalysts during CO₂ methanation – role of iron oxide clusters

Recent Developments in the Modelling of Heterogeneous Catalysts for CO₂ Conversion to Chemicals

Synthesis of monocarboxylic acids via direct CO2 conversion over Ni–Zn alloy catalysts

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Promotion of unsupported nickel catalyst using iron for CO2 methanation

Cited by 67 publications

References 66 publications

Structural dynamics in Ni–Fe catalysts during CO2 methanation – role of iron oxide clusters

Structural dynamics in Ni–Fe catalysts during CO2 methanation – role of iron oxide clusters

Recent Developments in the Modelling of Heterogeneous Catalysts for CO2 Conversion to Chemicals

Synthesis of monocarboxylic acids via direct CO2 conversion over Ni–Zn alloy catalysts

Contact Info

Product

Resources

About

Structural dynamics in Ni–Fe catalysts during CO₂ methanation – role of iron oxide clusters

Structural dynamics in Ni–Fe catalysts during CO₂ methanation – role of iron oxide clusters

Recent Developments in the Modelling of Heterogeneous Catalysts for CO₂ Conversion to Chemicals