Plasma catalytic technology for CH₄ and CO₂ conversion: A review highlighting fluidized‐bed plasma reactor

Abstract

The plasma catalytic valorization of gases, particularly CH4 and CO2, has gained increasing attention. Value‐added chemicals, such as syngas and ethene, can be formed under mild conditions when temperature‐decoupled plasma activation and multistep feasible catalytic conversion are combined. In this sense, efficient plasma–catalyst interaction is of key importance, for which, however, plasma catalysis, as an emerging technology, is still poorly studied, where new catalyst design and investigation took up the most effort. In this perspective work, the challenging but equally important plasma–catalyst interaction is discussed, comparatively analyzing which type of plasma, catalyst bed, is the most promising. Representative plasma catalytic systems with their characteristic features are summarized, where the intrinsic capability of fluidized‐bed dielectric barrier discharge (FB‐DBD) reactor to maximize the plasma–catalyst interaction is highlighted. Furthermore, ongoing research on FB plasma catalysis is reviewed, based on which the superiority of FB‐DBD to other candidates, especially the most widely used packed‐bed DBD reactor, is critically evaluated. In addition, the perspectives of FB‐DBD, including challenges and development potential, are discussed.

Plasma-enabled electrification of chemical processes toward decarbonization of society

“…A detailed analysis and review of fluidized-bed plasmas is presented in the literature. 51) The energy efficiency is expressed as the ratio of the reaction heat absorbed to the energy consumption and is calculated by the following equations:…”

Plasma Catalysis for Hydrogen Production: A Bright Future for Decarbonization

“…152 The authors proposed that the improvement in H 2 selectivity was due to the quenching sections between the ground electrodes, limiting CO 2 recombination. 152 Recently, the Nozaki group 153,207,208 developed a highly efficient fluidized-bed DBD reactor and highlighted its advantages for plasma-assisted DRM. As shown in Figure 14b, the feed gas flowed through the hollow of the high-voltage electrode and dispersed the catalyst particles, initiating selfsustaining fluidization motion.…”

“…Recently, the Nozaki group ,, developed a highly efficient fluidized-bed DBD reactor and highlighted its advantages for plasma-assisted DRM. As shown in Figure b, the feed gas flowed through the hollow of the high-voltage electrode and dispersed the catalyst particles, initiating self-sustaining fluidization motion .…”

Special issue: Renewable energies

“…The review paper introduces the concept of a fluidized-bed DBD reactor for the conversion of CH 4 and CO 2 . [11] Plasma-surface interaction in terms of increased radical flux and heat transfer augmentation is discussed. The perspective article describes the importance of product separation from the plasma-catalyst reaction field for improving energy efficiency.…”