Selective Oxygen Permeation Through Metalloporphyrin Polymer Membranes

Oxygen Permeation Studies of Ba0.5Sr0.5Co0.8Fe0.2Ox Asymmetric Membranes

modelling of multicomponent gases permeation process through glassy polymer membranes by the maxwell-stefan formulation

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Selective Mass Transport of CO2 Containing Mixtures through Zeolite Membranes

In this work, the main aspects regarding the permeation of mixtures containing CO2 and permanent gases such as H2 , N2 and CH4 through zeolite membranes have been investigated, focusing on the description of the mass transport mechanisms taking place inside the pores. First, a brief overview about the performance of the main zeolite membranes used in gas separation (e.g. DDR, CHA, AEI, FAU, etc...

Oxygen Diffusion in Oxide Crystals - Tracing New Routes to Identify the Rate Limiting Step of Oxygen Permeation through Perovskite Membranes

Perovskites are known as mixed electric conductors because they show both electronic (via electron holes) and ionic (via oxygen vacancies) conductivity. Since the electron conductivity is orders of magnitude higher than the ionic one, oxygen vacancy bulk diffusion is regarded as the rate limiting step in oxygen permeation through perovskites. However, for thin perovskite layer the rate of this ...

Oxygen diffusion through perovskite membranes

The oxygen permeation flux through the perovskite membrane made of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) has been measured as a function of both the temperature and the oxygen pressure gradient across the membrane. A simple model for the surface exchange fluxes was used to understand the mechanism of the oxygen transport. The limiting step of the oxygen transport was found to be the bulk diffusion fo...