YBaCo4O7+δ sorbent for oxygen-enriched carbon dioxide stream production at a low-temperature

► YBaCo4O7+δ (YBC114) is used to produce the O2-CO2 gas mixture at 200-400 °C. ► YBC114 shows good stability in the O2-containing or CO2-containing atmosphere. ► Effect of synthesis method is studied. ► Pressure and temperature swinging oxygen absorption/desorption are coupled.