Carbon dioxide decomposition using SrFeCo0.5Ox, a nonperovskite-type metal oxide

Sang Hyeok Kim, Jong Tak Jang, Jaeyong Sim, Jung Hyun Lee, Sung Chan Nam, Chan Young Park

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Greenhouse gas emission reductions need to be realized urgently to mitigate climate change. The most realistic solution is to store carbon dioxide (CO2) underground; however, this approach suffers from several problems such as leaks and contaminations are susceptible to earthquakes and have high cost. Therefore, many researchers are actively studying CO2 decomposition or utilization instead of storage. Such studies aim to decompose CO2 into useful materials. Although metal oxides of previous studies decomposed CO2 completely into carbon (C) at ∼300»°C, these results were obtained only in a laboratory-scale batch-type reactor. For practical applications, decomposition of a continuous flow of CO2 needs to be achieved. In this report, we demonstrate CO2 decomposition using metal oxide catalysts such as spinel-type Ni-ferrites and Sr/Fe-based nonperovskites. Based on the suggested reaction mechanism, catalysts were selected and tested in a continuous CO2 decomposition reactor. CO2 decomposition of up to ∼90% was achieved, and decomposition of ≥80% lasted for more than one hour at moderate temperatures. Because SrFeCo0.5Ox catalyst selected based on a theoretical mechanism shows high decomposition and good reproducibility, it is anticipated that these results contribute to GHG emission reduction.

Original languageEnglish
Pages (from-to)709-715
Number of pages7
JournalJournal of CO2 Utilization
Volume34
DOIs
Publication statusPublished - 2019 Dec

Keywords

  • Climate change
  • CO decomposition
  • Greenhouse gas
  • Ni-ferrites
  • SrFeCoO

ASJC Scopus subject areas

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

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