Air separation with perovskite-type oxide membranes: Membrane materials considerations.

摘要

here is growing interest in metal oxide membranes for gas separations. The vast majority of membrane systems under investigation exploit bulk or Knudsen diffusion in their pores. Unfortunately, these systems provide poor separation factors for gases. Non-porous perovskite-type oxide membranes, which exploit the transport of oxygen through the oxide crystal lattice, provide a means of overcoming the selectivity issue for the industrially important separation of oxygen from air.;This work discusses the relationship between crystal structure and the thermodynamic and transport properties of perovskite-type oxide membrane materials. We report the results of Differential Thermal Analysis, Thermogravimetric Analysis, X-ray Diffraction, Neutron Diffraction, Electron Diffraction, High Temperature ;We also report the results of high temperature