A promising approach to increase the sustainability of hydrocarbon combustion processes is carbon capturing. This requires high exhaust gas purity, which can be realized by utilizing pure oxygen, also known as oxy-fuel combustion. To reduce the complexity of handling and cost of pure oxygen, the present work investigates the alternative application of novel ceramic-based perovskite oxygen storage materials (OSM). A lab-scale model reactor was designed to investigate their oxygen storage and release characteristics. As the OSMs operate at elevated temperatures, the active part of the reactor is mounted above a McKenna type burner, which is intended to quickly preheat the packed bed. After heat-up, thermal energy release is implemented by alternating between air and fuel flow, facilitating a dynamic and recurring process of oxygen charging and discharging of the OSM. Operating behavior is investigated using an exhaust gas analysis (for measurement of oxygen and carbon dioxide) and temperature measurements within the OSM reactor bed. The tests show that, once the packed bed reaches its operating temperature, thermal energy can be generated by means of combustion (exothermal reaction) of methane during oxygen release (endothermal reaction), but also while recharging the OSM (exothermal reaction). The study examines the impact of fuel flow rates and operating temperatures and compares the performance to common oxygen carriers. The temperature increase caused by air or fuel flow through the packed bed indicates the storage and release reaction of oxygen. According to the thermal analysis, reactor performance improves at increased fuel flow rates and larger preheat temperatures. The improved performance and fuel conversion trend are confirmed by the flue gas analyses showing larger carbon dioxide concentrations and increased oxygen exchange. This is intended to achieve a high exhaust gas purity while maintaining continuous operation with the longest possible effective test duration.     «

A promising approach to increase the sustainability of hydrocarbon combustion processes is carbon capturing. This requires high exhaust gas purity, which can be realized by utilizing pure oxygen, also known as oxy-fuel combustion. To reduce the complexity of handling and cost of pure oxygen, the present work investigates the alternative application of novel ceramic-based perovskite oxygen storage materials (OSM). A lab-scale model reactor was designed to investigate their oxygen storage and rele...     »