Oxygen-sorptive and -desorptive properties of perovskite-related oxides under temperature-swing conditions for oxygen enrichment

摘要: Abstract A group of A- and/or B-site partially substituted strontium cobaltites was investigated for oxygen-sorptive properties under temperature-swing conditions in air. The with perovskite structure desorbed and absorbed significant amounts oxygen quickly as well reversibly on heating or cooling the temperature range between 300 1000 °C, while those brownmillerite 2H-BaNiO 3 either lacked showed retarded sorption hysteresis, respectively. Under cycles 550 °C at a rate 30 °C/min, SrCo 0.4 Fe 0.6 O 3− δ largest mass change 0.96%, desorption 7 cm (STP)/g oxide among perovskite-type oxides tested. This result appears to indicate potential new enriching method coupled technique.