| 摘要 |
PROBLEM TO BE SOLVED: To provide an oxygen permeable membrane capable of highly holding oxygen permeation performance for a long time even if being in contact with a CO-containing gas and to provide a fuel cell system using the oxygen permeable membrane.SOLUTION: In an oxygen permeable membrane consisting of a BaO-SrO-CoO-FeO-based complex oxide, the BaO-SrO-CoO-FeO-based complex oxide contains at least one of Zr and Ti by 3-20 mol% to the total amount of Co and Fe in the case of Zr and 10-50 mol% to the total amount of Co and Fe in the case of Ti. In a fuel cell system, a cathode off-gas from which oxygen is separated by using the oxygen permeable membrane is added to an anode off-gas and then a high concentration CO-containing anode off-gas is obtained. |
