Systematic investigation on structure stability and oxygen permeability of Sr-doped BaCo0.7Fe0.2Nb0.1O3−δ ceramic membranes

Oxygen permeability of Ce0.8Sm0.2O2 − δ–LnBaCo2O5 + δ (Ln=La, Nd, Sm, and Y) dual-phase ceramic membranes

“…A gas chromatography equipped with a 5-Å molecular sieve column was employed to analyze the oxygen content in the permeated gas, and the oxygen permeation flux was calculated based on the Eq. (1) [23]:…”

Investigation of Co–doped Ce0.8Sm0.2O2–δ–Ba0.95La0.05Zr0.1Fe0.9–xCoxO3–δDual–phase Oxygen Transport Membranes

“…Air was applied as feed gas to one side of the membrane at a flow rate of 300 ml min -1 [STP], while He, CO 2 or a gas mixture of He and CO 2 as the sweep gas at a flow rate of 100 ml min -1 [STP]. The oxygen permeation flux was calculated by the external standard method according to the equation by Li [7]. Rationally, the foreign phase BaCeO 3 hinders further diffusion of Ba 2+ and Ce 4+ between the two phases and maintains the integrity of electronic phases and ionic phases.…”

Bismuth doping effects on the structure, electrical conductivity and oxygen permeability of Ba0.6Sr0.4Co0.7Fe0.3O3−δ ceramic membranes

“…Our previous work revealed that Ba 0.6 Sr 0.4 Co 0.7 Fe 0.2 Nb 0.1 O 3Àd is a potential oxygen permeation membrane with good structural stability against reducing atmosphere and acceptable oxygen permeability [5]. In this study, Bi was employed to dope Ba 0.6 Sr 0.4 Co 0.7 Fe 0.3 O 3Àd with the aim of enhancing the oxygen permeability.…”

“…The MIEC membranes can combine the separation of oxygen from air and the catalytic oxidation in a single process serving not only as sustainable oxygen sources but also barriers to N 2 to avoid the generation of NO x pollutants [4]. Furthermore, the intermediate temperature needed for oxygen permeation of membranes can be attained by the heat generated by the POM reaction itself [5] thus being energy-saving. MIEC membrane is one of the most crucial parts of this POM technology.…”