Contribution of active species generated in plasma to CO 2 methanation

CO 2 methanation is an effective technology for CO 2 reduction. Generally, methanation reactions are accelerated using thermal catalysts. However, the temperature control is difficult because CO 2 methanation is an exothermic reaction, and the catalyst is deactivated by overheating. Plasma catalysis...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2023-09, Vol.62 (SL), p.SL1023
Main Authors: Toko, Susumu, Hasegawa, Taiki, Okumura, Takamasa, Kamataki, Kunihiro, Takenaka, Kosuke, Koga, Kazunori, Shiratani, Masaharu, Setsuhara, Yuichi
Format: Article
Language:English
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Summary:CO 2 methanation is an effective technology for CO 2 reduction. Generally, methanation reactions are accelerated using thermal catalysts. However, the temperature control is difficult because CO 2 methanation is an exothermic reaction, and the catalyst is deactivated by overheating. Plasma catalysis can solve this problem by driving this reaction at lower temperatures. Therefore, in this study, we investigated the contribution of the active species generated in the plasma to CO 2 methanation. We found that the density of active species is linearly related to the power density, and in particular, the CH 4 generation rate is determined by the CO-derived active species, not the H-derived active species. Furthermore, with an increase in the catalyst temperature, a new reaction pathway for CH 4 production is added. The results of this study contribute to the understanding of the relationship between the active species produced in plasma and CO 2 methanation.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/acdad9