Effect of B-site tungsten doping on structure and oxygen permeation properties of SrCo0.8Fe0.2O3−δ perovskite membranes

Direct AC/DC Heating of Oxygen Transport Membranes

“…In order to describe the oxygen transport in the hollow fiber membranes, we propose a model based on the semi-empirical dependence of the oxygen flux (JO 2 ) on the partial pressures of oxygen, which is generally used in the case of planar membranes [9][10][11][12][13] and was rationalized by the oxygen transport model presented in [14]:…”

Oxygen-permeable ceramic membrane with improved mediate-temperature stability based on partially A-site doped KxSr1-xCo0.8Fe0.2O3-δ

“…Besides oxygen permeation flux, the structural stability is another important factor to be considered in commercialization. Although SrCo 0.8 Fe 0.2 O 3-δ was reported to have high oxygen permeation flux, the poor structural stability limits its practical application [30,31]. It was reported that severe oxygen permeation decay with time always take places for most perovskite-based materials below 800°C because of their poor thermodynamic stability.…”

CO2‐resistant SDC‐SSAF oxygen selective dual‐phase hollow fiber membranes

“…Typical perovskite membrane materials such as La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‐δ (LSCF) 8,9 and Ba 0.5 Sr 0.5 Co 0.2 Fe 0.8 O 3‐δ (BSCF) 10,11 display high oxygen permeation fluxes but exhibit structural decomposition during exposure to CO 2 12 . Two strategies to improve the CO 2 resistance of oxygen permeable membranes include doping of membrane materials with highly charged cations, for example, Mo or W, which increases the membrane surface activity and reduces reaction with acidic CO 2 , 13,14 and the use of dual‐phase membranes. To enhance their structural stability, perovskites can be combined with other fluorite ionic conductors, which have high mechanical stability in reducing atmosphere, such as samarium‐doped ceria (SDC), gadolinium‐doped ceria (GDC), and yttrium‐stabilized zirconia (YSZ) to form dual‐phase membranes 15–19 .…”