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Title: Auto-methanation for transition-metal catalysts loaded on various oxide supports: A novel route for CO<inf>2</inf> transformation at room-temperature and atmospheric pressure
Authors: Choji Fukuhara
Asuka Kamiyama
Mikito Itoh
Nozomu Hirata
Sakhon Ratchahat
Masao Sudoh
Ryo Watanabe
National University Corporation Shizuoka University
Mahidol University
Amano Institute of Technology
Keywords: Chemical Engineering;Chemistry;Engineering
Issue Date: 29-Jun-2020
Citation: Chemical Engineering Science. Vol.219, (2020)
Abstract: © 2020 Elsevier Ltd The CO2 methanation for transition-metal catalysts loaded on various oxide-supports was investigated under feeding with a raw material gas containing oxygen. The co-feeding of the oxygen greatly improved methanation performance for Ni- and Ru-based catalysts, because of the high thermal energy generated from hydrogen–oxygen combustion. Especially, Ni/CeO2, Ni/ZrO2, Ni/Y2O3, and Ni/Al2O3 catalysts and the prepared ruthenium catalysts demonstrated high activity and high methane-selectivity even in a region at room temperature and atmospheric pressure. The auto-methanation (AM) phenomenon, which is reported in the world for the first time, proceeded over these catalysts. Compared to that of the Ni-based catalyst, the AM activity of the Ru-based catalyst was approximately 10% higher. Although it was generally predicted that the produced methane was combusted by the co-fed oxygen, yet such methane combustion was not observed so as that the minimum ignition energy of methane–oxygen is much larger than that of hydrogen–oxygen.
ISSN: 00092509
Appears in Collections:Scopus 2020

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