A 30 mu m thin-film tubular CGO (Ce0.9Gd0.1O1.95-delta) membrane with catalytic layers on both sides has been prepared by dip-coating on a low cost, porous magnesium oxide (MgO) support. The MgO support was fabricated through a thermoplastic extrusion process. Support, thin membrane and catalytic layers were sintered in individual steps at temperatures between 1250 and 1300 degrees C to achieve a controlled removal of binder and organic additives and to obtain the desired, defect free microstructure. The prepared asymmetric tubular CGO membrane has been tested at elevated temperatures (up to 900 degrees C) using atmospheric air and N-2, H-2 for the feed and sweep side respectively. The oxygen permeation was 4 N ml min(-1) cm(-2) at 850 degrees C using H-2 on one side and air on the other side. (C) 2015 Elsevier B.V. All rights reserved.