Our group designed and prepared a new membrane material Ce0.85Sm0.15O1.925 - Sr2Fe1.5Mo0.5O6-δ (SDC-SFM) for hydrogen separation. It exhibited high performance and good tolerance to CO2 and H2S impurities. The membrane reactor was operated steadily for 532 h under atmospheres containing CO2 and H2S impurities. This work has been published in AIChE Journal, 2019, 65, 1088–1096.