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

Abstract

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.

Mn-Based Catalysts for Post Non-Thermal Plasma Catalytic Abatement of VOCs: A Review on Experiments, Simulations and Modeling

“…Plasma is one of the four fundamental states of matter [7]. It is composed of various entities such as electrons, atoms, ions, and molecules in fundamental and excited states [8][9][10][11][12]. In NTP, the electron temperature is not in thermal equilibrium with other entities (such as ions, atoms, and molecules) and the electron temperature can reach approximately 10 5 K. However, the temperature of heavy entities remains close to room temperature and thus, the average gas temperature of NTP also remains almost close to the room temperature.…”

Gás Natural Sintético a partir de Dióxido de Carbono: Um “Challenge Accepted!” para os Zeólitos

“…Apesar de ser um processo termodinamicamente favorável, as consideráveis limitações cinéticas tornam necessário o uso de um catalisador que permita obter velocidades de reação aceitáveis. Assim, foram publicados numerosos estudos incluindo não só a metanação catalítica por via térmica convencional, mas também por fotocatálise, eletrocatálise ou até catálise assistida por plasma [7][8][9][10][11]…”

A Review about the Recent Advances in Selected NonThermal Plasma Assisted Solid–Gas Phase Chemical Processes

“…Among the type of non-thermal plasma employed for CO 2 methanation, the most encountered are for sure DBD, gliding arc (GA) and microwaves (MW). In the extensive review of the plasma-assisted CO 2 methanation by Debek et al [136] an interesting comparison of the efficiency of these technologies has been proposed: DBD offers the lowest conversion values, while the highest values are reached by MW and glow discharge (GD). What clearly emerges from this study, however, is that these processes are not selective, as the methane conversion is basically null, when they are conducted without presence of a catalyst (Figure 18).…”

“…CO 2 methanation in plasma-assisted processes without the presence of catalyst[136]. Adapted with permission from Radosław Dębek, Federico Azzolina-Jury, Arnaud Travert, Françoise Maugé, Renewable and Sustainable Energy Reviews; published by Elsevier, 2019.…”