Auto-methanation for transition-metal catalysts loaded on various oxide supports: A novel route for CO2 transformation at room-temperature and atmospheric pressure

Choji Fukuhara, Asuka Kamiyama, Mikito Itoh, Nozomu Hirata, Sakhon Ratchahat, Masao Sudoh, Ryo Watanabe

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number115589
JournalChemical Engineering Science
Volume219
DOIs
Publication statusPublished - 2020 Jun 29
Externally publishedYes

Keywords

  • Auto-methanation
  • Combustion
  • Methane production
  • Power to gas
  • Sabatier reaction

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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