CO2 Decomposition Using Activated Rh- and Ru-SrFeO3-δ for Cyclic Production of CO

Jin Yong Kim, Sang Hyeok Kim, Chan Young Park, Il Hyun Baek, Jong Tak Jang, Jeong Won Kang, Sung Chan Nam

Research output: Contribution to journalArticlepeer-review

Abstract

As global warming problem caused by greenhouse gas (GHG) emissions accelerates, many methods to remove carbon dioxide (CO2) have been proposed. In particular, CO2 decomposition has been developed for GHG emission reduction and CO2 upcycling. Our group previously reported on the results of efficient CO2 decomposition using SrFeO3-δ (perovskite-type metal oxide). According to the results of the isothermal test of SrFeO3-δ, reaction for a long time at high temperatures is necessary for effective CO2 decomposition, and this may lead to inefficient energy use. Therefore, in this study, Rh and Ru were impregnated as catalysts to SrFeO3-δ. As a result of CO2 decomposition using these catalysts, CO2 decomposition appeared at a low temperature of ∼200 °C. The maximum produced CO concentration was 3 times higher due to the spillover phenomenon of the precious metal catalysts. The cyclic tests showed catalyst stabilities of Rh- and Ru-SrFeO3-δ as well as the potential for continued and improved CO production. In additions, this study demonstrated that the decomposition of CO2 and the production of CO are performed by reverse Boudouard reactions as well as oxygen vacancies. It is expected that these results will contribute to GHG emission reduction.

Original languageEnglish
Article number101724
JournalJournal of CO2 Utilization
Volume53
DOIs
Publication statusPublished - 2021 Nov

Keywords

  • CO decomposition
  • Climate change
  • Greenhouse gas
  • Spillover
  • SrFeO

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Waste Management and Disposal
  • Process Chemistry and Technology

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