Methane production by a combined Sabatier reaction/water electrolysis process

Guerra, Luís; Rossi, S. De; Rodrigues, J.; Gomes, João; Puna, Jaime; Santos, Maria Teresa

doi:10.1016/j.jece.2017.12.066

Cited by 37 publications

(31 citation statements)

References 5 publications

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“…Co is known to have a high activity, similar to that of Ni [ 58 , 59 ] (Activity: Ru > Fe > Ni > Co > Mo [ 60 ]) and high selectivity (Selectivity: Ni > Co > Fe > Ru [ 60 ]) towards the methanation of CO 2 . The possible reaction network for the reduction of CO 2 can be described by Equation (6) together with Equations (7) and (8) [ 61 , 62 ].

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Section: Resultsmentioning

confidence: 99%

Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

2021

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This paper reports on an experimental evaluation of the hydrogen separation performance in a proton exchange membrane system with Pt-Co/C as the anode electrocatalyst. The recovery of hydrogen from H2/CO2, H2/CH4, and H2/NH3 gas mixtures were determined in the temperature range of 100–160 °C. The effects of both the impurity concentration and cell temperature on the separation performance of the cell and membrane were further examined. The electrochemical properties and performance of the cell were determined by means of polarization curves, limiting current density, open-circuit voltage, hydrogen permeability, hydrogen selectivity, hydrogen purity, and cell efficiencies (current, voltage, and power efficiencies) as performance parameters. High purity hydrogen (>99.9%) was obtained from a low purity feed (20% H2) after hydrogen was separated from H2/CH4 mixtures. Hydrogen purities of 98–99.5% and 96–99.5% were achieved for 10% and 50% CO2 in the feed, respectively. Moreover, the use of proton exchange membranes for electrochemical hydrogen separation was unsuccessful in separating hydrogen-rich streams containing NH3; the membrane underwent irreversible damage.

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…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

2021

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“…The catalytic hydrogenation of CO 2 to CH 4 (Sabatier reaction) is shown in Equation . This is the fundamental reaction for commercial use, with a change in Gibbs free energy of −27 kcal mol −1 (Δ G ° at 298 K).

true CO_{2} (g) + 4 H_{2} (g) \to CH_{4} (g) + 2 normalH_{2} normalO (g)

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Section: Application Of Mncs In Energy Conversionmentioning

confidence: 99%

Metal Nanoclusters: New Paradigm in Catalysis for Water Splitting, Solar and Chemical Energy Conversion

et al. 2019

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A sustainable future demands innovative breakthroughs in science and technology today, especially in the energy sector. Earth‐abundant resources can be explored and used to develop renewable and sustainable resources of energy to meet the ever‐increasing global energy demand. Efficient solar‐powered conversion systems exploiting inexpensive and robust catalytic materials for the photo‐ and photo‐electro‐catalytic water splitting, photovoltaic cells, fuel cells, and usage of waste products (such as CO2) as chemical fuels are appealing solutions. Many electrocatalysts and nanomaterials have been extensively studied in this regard. Low overpotentials, catalytic stability, and accessibility remain major challenges. Metal nanoclusters (NCs, ≤3 nm) with dimensions between molecule and nanoparticles (NPs) are innovative materials in catalysis. They behave like a “superatom” with exciting size‐ and facet‐dependent properties and dynamic intrinsic characteristics. Being an emerging field in recent scientific endeavors, metal NCs are believed to replace the natural photosystem II for the generation of green electrons in a viable way to facilitate the challenging catalytic processes in energy‐conversion schemes. This Review aims to discuss metal NCs in terms of their unique physicochemical properties, possible synthetic approaches by wet chemistry, and various applications (mostly recent advances in the electrochemical and photo‐electrochemical water splitting cycle and the oxygen reduction reaction in fuel cells). Moreover, the significant role that MNCs play in dye‐sensitized solar cells and nanoarrays as a light‐harvesting antenna, the electrochemical reduction of CO2 into fuels, and concluding remarks about the present and future perspectives of MNCs in the frontiers of surface science are also critically reviewed.

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“…In the reported installation [5], one can achieve a CH4 yield of 25.5% and 44.2% CO2 conversion into CH4 at 96.5% selectivity towards CH4. In this way, one can produce methane fuel on-line in remote locations.…”

Section: Co2 + 4h2 = Ch4 + 2h2omentioning

confidence: 96%

“…Alternatively, the methane production can be done by a combined Sabatier reaction/water electrolysis process [5]. A mixture of gases H2, CO, CO2 (syngas) obtained from alkaline water electrolysis using graphite electrodes (1 kW prototype) was used instead of producing just oxygen and hydrogen as in the common alkaline electrolysis process.…”

Section: Co2 + 4h2 = Ch4 + 2h2omentioning

confidence: 99%

Kinetic study of carbon dioxide catalytic methanation over cobalt–nickel catalysts

et al. 2019

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Based on the data of the thermoprogrammed desorption and using mass-spectroscopic analysis of desorbed products and on the kinetic patterns of the methanation process for cobalt–nickel catalysts, we suggested a mechanism for the reaction which passes through forming intermediate formyl compounds: CHO*, HCOH*, and HCOOH*. Because of the high stability of the carbon dioxide molecule, the step of adding the first hydrogen atom is the limiting step. Such a mechanism is in good agreement with the proposed kinetic equations.

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Methane production by a combined Sabatier reaction/water electrolysis process

Cited by 37 publications

References 5 publications

Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

Metal Nanoclusters: New Paradigm in Catalysis for Water Splitting, Solar and Chemical Energy Conversion

Kinetic study of carbon dioxide catalytic methanation over cobalt–nickel catalysts

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