Enhanced carbon dioxide decomposition using activated srfeo_3−δ

Today, climate change caused by global warming has become a worldwide problem with increasing greenhouse gas (GHG) emissions. Carbon capture and storage technologies have been developed to capture carbon dioxide (CO₂ ); however, CO₂ storage and utilization technologies are relatively less developed. In this light, we have reported efficient CO₂ decomposition results using a nonperovskite metal oxide, SrFeCo_0.5 O_x, in a continuous-flow system. In this study, we report enhanced efficiency, reliability under isothermal conditions, and catalytic reproducibility through cyclic tests using SrFeO_3−δ . This ferrite needs an activation process, and 3.5 vol% H₂ /N₂ was used in this experiment. Activated oxygen-deficient SrFeO_3−δ can decompose CO₂ into carbon monoxide (CO) and carbon (C). Although SrFeO_3−δ is a well-known material in different fields, no studies have reported its use in CO₂ decomposition applications. The efficiency of CO₂ decomposition using SrFeO_3−δ reached ≥90%, and decomposition (≥80%) lasted for approximately 170 min. We also describe isothermal and cyclic experimental data for realizing commercial applications. We expect that these results will contribute to the mitigation of GHG emissions.