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

“…Consequently, it is reasonably understood that BSCF and BCFZ membranes can be steadily operated for a long time as reported in Refs. [22,23]. Fig.…”

“…Three typical mixed electronic and ionic conducting perovskite membranes, SrCo 0. 8 [23] were chosen because they are widely studied and have similar compositions but different properties. SCF has the highest reported oxygen permeation flux of 3.1 ml/(min cm 2 ) at 1123 K, but its stability is poor.…”

Mixed-conducting oxygen permeable ceramic membranes for the carbon dioxide reforming of methane

“…[1][2][3][4] Because of the high economic, environmental, and safety costs associated with pure oxygen, oxygen-permeable ceramic membranes have been explored as an alternative oxygen source for hydrocarbon conversion reactors. [1][2][3][4][5][6][7][8][9][10] These non-porous ceramic materials allow the conduction of oxygen ions through the lattice of the solid material resulting in a 100% selectivity for oxygen regardless of the source gas. The mixed-conducting materials of interest for membrane reactor applications conduct electrons as well as oxygen ions, so they require only high temperature (typically 700 uC or higher) and an imposed oxygen potential gradient to transmit oxygen.…”

Development and Application of Oxygen Permeable Membrane in Selective Oxidation of Light Alkanes

“…8 Fe 0.2 O 3)d may improve the phase stability of the material. For example, partial substitute of Sr by La [37] or Co by Ti [38], Zr [18,19,39,40] can significantly improve the stability of the material, but at the cost of oxygen permeability. Prado et al [37] figure 3.…”

“…Doping less reducible ions, such as Ga 3+ [21], Ti 4+ [44], Zr 4+ [18,19,39,40], is regarded as another effective method to improve the stability of the membrane materials under reducing environments at high temperatures. BaZr 0.2 Co 0.4 Fe 0.4 O 3)d developed in our group [19,45] is an example, which can withstand syngas production experiment at 850°C for more than 2200 h [45].…”