in situ赤外吸収分光分析によるプラズマ支援メタネーション反応の機構解明

抄録

Methanation technology is a low-carbon technology that represents CCU and is in urgent need of commercialization. It is important to realize this technology at the lowest possible temperature due to the limitation of thermal equilibrium, and it is also necessary to develop a compact, decentralized technology that is connected to renewable energy and can handle high load fluctuations. The objective of this study is to construct a low temperature methanation reaction using non-equilibrium plasma and catalysts. To elucidate the reaction enhancement mechanisms, the effect of active species on gas-phase and surface reactions was clarified using in situ FTIR, which enables diagnostics of catalyst surface reactions under the action of plasma. The diagnostics revealed that the amount of CH₄ production in the methanation can be improved by cooperating gliding arc discharge and Ni/Al₂O₃ and the cause of the improvement is the accelerating of bidentate formate decomposition under gliding arc discharge. In addition, we found that the generation of active hydrogen by gliding arc discharge assists in the efficient decomposition of bidentate formate.