M. Heidari - Chemical Engineering Department, Sharif University of Technology, Tehran, Iran
A. Zamanian - Gas Research Division, Research Institute of Petroleum Industry, Tehran, Iran
E. Ganji Babakhani - Gas Research Division, Research Institute of Petroleum Industry, Tehran, Iran
M. Amanipour - Chemical Engineering Department, Sharif University of Technology, Tehran, Iran

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.

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