Failure mechanisms of ceramic membrane reactors in partial oxidation of methane to synthesis gas

In situ high temperature X-ray diffraction studies of mixed ionic and electronic conducting perovskite-type membranes

“…This means that SCF exhibits poor phase stability at low oxygen partial pressures although it has good phase stability under air. It was found that the perovskite structure of SCF is thermodynamically stable only at higher oxygen pressures (> 0.1 atm) and this material has very limited chemical and structure stability at low oxygen partial pressures [24]. Pei et al [24] found that the membrane reactor made from SCF broke into pieces when methane was fed to the reactor.…”

Investigation of ideal zirconium-doped perovskite-type ceramic membrane materials for oxygen separation

“…Presently, the application of mixed conducting perovskite-type (ABO 3 ) or perovskite-related oxides for the preparation of MIECM has received much attention due to their higher oxygen ion and electron conductivity [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. It was reported that SrCo 0.8 Fe 0.2 O 3−δ [21][22][23]31] had a high oxygen permeation flux of 3.1 ml cm −2 min −1 under air/He gradient (temperature, 850 • C; membrane thickness, 1 mm).…”

97/00581 Mixed-conducting ceramic membranes for partial oxygenation of methane

“…1 [12] give a clear picture of the state of SCF-1 under reaction conditions. When the membrane tube is operating, high oxygen pressure is maintained outside the tube and low oxygen pressure is maintained inside the tube.…”