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 language | English |
---|---|
Pages (from-to) | 709-715 |
Number of pages | 7 |
Journal | Journal of CO2 Utilization |
Volume | 34 |
DOIs | |
Publication status | Published - 2019 Dec |
Bibliographical note
Funding Information:The authors would like to acknowledge the financial support of the National Research Foundation under “Next Generation Carbon Upcycling Project” (Project No. 2017081332 ) of the Ministry of Science and ICT, Republic of Korea . The analytical support from the Platform Technology Laboratory at Korea Institute of Energy Research is much appreciated, especially for invaluable assistance during in-situ XRD and surface analysis.
Funding Information:
The authors would like to acknowledge the financial support of the National Research Foundation under Next Generation Carbon Upcycling Project (Project No.2017081332) of the Ministry of Science and ICT, Republic of Korea. The analytical support from the Platform Technology Laboratory at Korea Institute of Energy Research is much appreciated, especially for invaluable assistance during in-situ XRD and surface analysis.
Publisher Copyright:
© 2019 Elsevier Ltd.
Keywords
- CO decomposition
- Climate change
- Greenhouse gas
- Ni-ferrites
- SrFeCoO
ASJC Scopus subject areas
- Chemical Engineering (miscellaneous)
- Waste Management and Disposal
- Process Chemistry and Technology