Carbon Dioxide Decomposition Using Oxygen Deficient Metal Oxides

It is generally believed that the climate change is mainly attributed to the enormous emission of greenhouse gas in a short period of time. Although many efforts have been devoted for the treatment of CO₂, there is almost no realistic solution except the injection to the underground. The storing into the underground also has several problems including leaks, earthquakes, and the costs. Although Tamaura et. al reported that carbon dioxide could be reduced ~100% to carbon at 290 °C, it was the results obtained only in a lab-scale batch type reactor. For the practical applications, the study of decomposition in the continuous flow of carbon dioxide is essential. In this report, we demonstrate the decomposition results of CO₂ using spinel-type Ni ferrites and strontium and iron-based non-perovskites. Based on the suggested reaction mechanism, the experimental conditions and the catalysts were selected and tested in a continuous CO₂ decomposition reactor. We also studied the structural behaviors of the catalysts before and after the measurements.