Oxygen production of tubular module with La _0.6Sr _0.4Ti _0.3Fe _0.7O _3-δ coated Ba _0.5Sr _0.5Co _0.8Fe _0.2O _3-δ membrane

In this work, module containing La _0.6Sr _0.4Ti _0.3Fe _0.7O _3-δ coated Ba _0.5Sr _0.5Co _0.8Fe _0.2O _3-δ tubular membranes was successfully prepared and evaluated for oxygen production. The oxygen permeability of a single-La _0.6Sr _0.4Ti _0.3Fe _0.7O _3-δ coated Ba _0.5Sr _0.5Co _0.8Fe _0.2O _3-δ tubular membrane was studied in the same condition for comparison. The oxygen permeation flux was measured at temperature, air pressure, and retentate flow rate range of 850-950°C, 3-9atm, and 200-5000mL/min, respectively. Oxygen permeation flux increased with increasing retentate flow rate, temperature and air pressure, while oxygen recovery decreased with increasing retentate flow rate at the same condition. Oxygen production rate and recovery of module containing three-La _0.6Sr _0.4Ti _0.3Fe _0.7O _3-δ coated Ba _0.5Sr _0.5Co _0.8Fe _0.2O _3-δ tubular membranes (length=22.5cm, total effective surface area=75.06cm ² (25.02cm ²×3), thickness=0.8mm) were 463mL/min and 40% at 900°C under 9atm and 5000mL/min retentate flow, respectively. Moreover, long-term operation test results indicate that the oxygen production rate was quite stable during the oxygen production operation.