Preparation of BaCe0.9 Yb0.1 O3-δ asymmetrical membrane for hydrogen separation at high tempratures

A mixed proton-electron conducting perovskite was synthesized by liquid-citrate method and the corresponding membrane was prepared by pressing followed by sintering. the hydrogen permeability of bace09yb0 ,03 g was studied as a function of temperature and hydrogen partial pressure (ph2) gradient. using 100% dry hydrogen at 1173 k, the hydrogen permeation rate of dense membranes (1.63 mm thick) for a mixture of 60% h2/he was 0.000293 mol/(m2 s). the phase structure of powder was characterized by x-ray diffraction and thermogravimetry (tg). scanning electron microscopy (sem) was used to investigate the microstructure of sintered membrane. activation energy estimated with arrhenius equation was 29 kj/mol.