Journal of Membrane Science, Vol.403, 188-195, 2012
Oxygen production of tubular module with La0.6Sr0.4Ti0.3Fe0.7O3-delta coated Ba0.5Sr0.5Co0.8Fe0.2O3-delta membrane
In this work, module containing La0.6Sr0.4Ti0.3Fe0.7O3-delta coated Ba0.5Sr0.5Co0.8Fe0.2O3-delta tubular membranes was successfully prepared and evaluated for oxygen production. The oxygen permeability of a single-La0.6Sr0.4Ti0.3Fe0.7O3-delta coated Ba0.5Sr0.5Co0.8Fe0.2O3-delta 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 degrees C, 3-9 atm, and 200-5000 mL/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-La0.6Sr0.4Ti0.3Fe0.7O3-delta coated Ba0.5Sr0.5Co0.8Fe0.2O3-delta tubular membranes (length = 22.5 cm, total effective surface area = 75.06 cm(2) (25.02 cm(2) x 3), thickness = 0.8 mm) were 463 mL/min and 40% at 900 degrees C under 9 atm and 5000 mL/min retentate flow, respectively. Moreover, long-term operation test results indicate that the oxygen production rate was quite stable during the oxygen production operation. (C) 2012 Elsevier B.V. All rights reserved.