Reaction mechanisms of carbon dioxide methanation

Baraj, Erlisa; Vagaský, Stanislav; Hlinčík, Tomáš; Ciahotný, Karel; Tekáč, Viktor

doi:10.1515/chempap-2015-0216

Cited by 63 publications

(30 citation statements)

References 123 publications

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“…In the current literature, there is a number of recent reviews concerning catalysts for CO2 methanation [1,2,[34][35][36][37][38][39][40]. The appropriate selection of a catalyst for thermal CO2 methanation should be a starting point for the search of an efficient material for the plasma-catalytic process.…”

Section: Catalytic Co2 Methanationmentioning

confidence: 99%

A review on plasma-catalytic methanation of carbon dioxide – Looking for an efficient catalyst

Dębek

Azzolina-Jury

Travert

et al. 2019

Renewable and Sustainable Energy Reviews

105

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The review focuses on presenting recent findings on CO2 methanation plasma-catalytic process. In order to understand the background of the research, firstly a summary of thermal catalytic CO2 methanation is presented. Secondly, discussion on plasma CO2 hydrogenation including various plasma types and process parameters is addressed. Catalytic CO2 methanation is already an industrial process achieving high conversions of CO2 and CH4 yield. However, the need to optimize this process (decrease reaction temperature, increase catalyst activity, selectivity and stability) resulted in the development of plasma technology. It was proven that plasma can actively convert CO2. The main product of plasma CO2 hydrogenation is, however, carbon monoxide. Therefore, a plasma process is not selective for CH4 production and the presence of a catalyst is necessary to effectively convert CO2 to CH4 under plasma conditions. The study of plasma-catalytic CO2 methanation is quite a new topic focused mainly on the application of dielectric barrier discharge plasma and Ni-based catalyst. This review summarizes recent advantages of the plasma catalytic process and discusses possible directions of catalyst development.

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Section: Catalytic Co2 Methanationmentioning

confidence: 99%

A review on plasma-catalytic methanation of carbon dioxide – Looking for an efficient catalyst

Dębek

Azzolina-Jury

Travert

et al. 2019

Renewable and Sustainable Energy Reviews

105

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“…The so-called Sabatier reaction is reversible and exothermic (ΔH 298K = -165 kJ mol -1 ) and is also thermodynamically favorable (ΔG 298K = -130.8 kJ mol -1 ) [11,12]. Additionally, the reaction proceeds with a decrease in volume.…”

Section: Co Methanation Reaction Mechanismmentioning

confidence: 99%

A Short Review on Ni‐Catalyzed Methanation of CO₂: Reaction Mechanism, Catalyst Deactivation, Dynamic Operation

Strucks

Failing

Kaluza

2021

Chemie Ingenieur Technik

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This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.Today, the use of renewable energies and recycling of climate-changing gases are increasingly important. In this context, coupling of methanation with small, decentralized CO 2 sources such as biogas plants provides one possibility. However, fluctuating availability of renewables for hydrogen production in combination with small storage volumes result in an enhanced demand for dynamic process operation. This leads to new research challenges with respect to the required catalysts and the overall process design. To draw reliable conclusions about the catalytic performance under dynamic process operation, the mechanism of the methanation reaction as well as typical deactivation procedures of the catalyst applied under steady-state conditions have to be reviewed thoroughly.

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“…However, we decided not to break down the Sabatier reaction into a system of elementary reactions due to the following reasons. First, the Sabatier reaction is not fully understood yet from the viewpoint of elementary reaction mechanisms, with two possibilities proposed [37]. Second, using a system of elementary reactions would increase the computational complexity of the model significantly as this would introduce additional variables for the intermediate chemical species.…”

Section: The Sabatier Reaction In Microchannel Reactorsmentioning

confidence: 99%

Optimal control of the Sabatier process in microchannel reactors

2021

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We consider the optimization of a chemical microchannel reactor by means of PDE-constrained optimization techniques, using the example of the Sabatier reaction. To model the chemically reacting flow in the microchannels, we introduce a three- and a one-dimensional model. As these are given by strongly coupled and highly nonlinear systems of partial differential equations (PDEs), we present our software package cashocs which implements the adjoint approach and facilitates the numerical solution of the subsequent optimization problems. We solve a parameter identification problem numerically to determine necessary kinetic parameters for the models from experimental data given in the literature. The obtained results show excellent agreement to the measurements. Finally, we present two optimization problems for optimizing the reactor’s product yield. First, we use a tracking-type cost functional to maximize the reactant conversion, keep the flow rate of the reactor fixed, and use its wall temperature as optimization variable. Second, we consider the wall temperature and the inlet gas velocity as optimization variables, use an objective functional for maximizing the flow rate in the reactor, and ensure the quality of the product by means of a state constraint. The results obtained from solving these problems numerically show great potential for improving the design of the microreactor.

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Reaction mechanisms of carbon dioxide methanation

Abstract: Constant increase of carbon dioxide emissions from anthropogenic activities leads to the search of options for its recycling and utilization. Although recycled CO

Cited by 63 publications

References 123 publications

A review on plasma-catalytic methanation of carbon dioxide – Looking for an efficient catalyst

A review on plasma-catalytic methanation of carbon dioxide – Looking for an efficient catalyst

A Short Review on Ni‐Catalyzed Methanation of CO₂: Reaction Mechanism, Catalyst Deactivation, Dynamic Operation

Optimal control of the Sabatier process in microchannel reactors

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Reaction mechanisms of carbon dioxide methanation

Abstract: Constant increase of carbon dioxide emissions from anthropogenic activities leads to the search of options for its recycling and utilization. Although recycled CO

Cited by 63 publications

References 123 publications

A review on plasma-catalytic methanation of carbon dioxide – Looking for an efficient catalyst

A review on plasma-catalytic methanation of carbon dioxide – Looking for an efficient catalyst

A Short Review on Ni‐Catalyzed Methanation of CO2: Reaction Mechanism, Catalyst Deactivation, Dynamic Operation

Optimal control of the Sabatier process in microchannel reactors

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Product

Resources

About

A Short Review on Ni‐Catalyzed Methanation of CO₂: Reaction Mechanism, Catalyst Deactivation, Dynamic Operation