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- W3080593600 abstract "• Ru-based catalyst has hysteresis profile of CO 2 methanation. • Auto-methanation (AM) autonomously starts over Ru-based catalyst under co-fed O 2 . • Start-up state was summarized in mapping information of O 2 concentration and flow rate. • Constant AM performance for 120 h was obtained with high activity. • Constant AM characteristics were exhibited in DSS operation with frequently start-up. Assuming the treatment of exhaust gas from an industrial process, the methanation characteristics of a Ru/CeO 2 catalyst are investigated when oxygen coexisted in the raw material gas. The change in oxygen concentration significantly affected methanation activity, and above 2 vol%, the methanation started autonomously at a room-temperature region, demonstrating auto-methanation (AM) behavior. In this case, oxygen selectively combused hydrogen and did not burn the produced methane. The start-up state and heat generation state of the AM in the room-temperature region are summarized in the mapping information using the oxygen concentration in the raw material gas and feeding flow rate as parameters. The AM that started at room temperature demonstrated constant activity and methane selectivity for a considerably long time, as well as constant methanation characteristics even during daily start-up and shut down (DSS) operations, which repeatedly starts and shuts down. The change in the surface morphology of the Ru/CeO 2 catalyst in the DSS operation is insignificant. Thus, the methanation system constructed in this study is considered to be highly applicable as an industrial CO 2 treatment technology." @default.
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- W3080593600 date "2020-12-01" @default.
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- W3080593600 title "Performance characteristics of auto-methanation using Ru/CeO2 catalyst, autonomously proceeding at room temperature" @default.
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- W3080593600 doi "https://doi.org/10.1016/j.fuel.2020.118619" @default.
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