Preparation of BaCe۰.۹Yb۰.۱O۳-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 BaCe۰.۹Yb۰.۱O۳-δ was studied as a function of temperature and hydrogen partial pressure (PH۲) gradient. Using ۱۰۰% dry hydrogen at ۱۱۷۳ K, the hydrogen permeation rate of dense membranes (۱.۶۳ mm thick) for a mixture of ۶۰% H۲/He was ۰.۰۰۰۲۹۳ mol/(m۲ 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 ۲۹ kJ/mol.

کلیدواژه ها:

Ceramic Membrane ، BaCeYb ، Electron/Proton Conductivity ، Hydrogen Ppermeation