Oxygen transport through membranes

Oxygen transport through membranes of iPP/HOCP blends was studied as a function of the weight fraction of the two components. The results showed that increasing HOCP content lowers oxygen permeability and difiusivity through the films. The HOCP has an antiplasticizing effect and produces a hmitation in penetrant mobfiity (11). 

Experimentally this facilitated transport has been tested [40, 46, 47, 113] in our group for the facilitation of CO2 and oxygen transport through membranes. 

T. Suzuki, H. Yasuda, H. Nishide, X.-S. Chen andE. Tsuchida, Electrochemical Measurement of Facilitated Oxygen Transport Through a Polymer Membrane Containing Cobaltporphyrin as a Fixed Carrier, J. Membr. Sci. 112, 155 (1996). 

Oxygen transport through the solid state can be caused by the difference in both electrical and chemical potentials. The last effect can be used for the development of oxygen-selective ceramic membranes. The demands of materials for such membranes are similar to the demands for solid electrolytes high density in order to prevent physical penetration of the gas and a high coefficient of oxygen... 

J.E. ten Elshof, H.J.M. Bouwmeester and H. Verweij, Oxygen transport through Lai-xSrxFeOs-s membranes. I. Permeation in air/He gradients. Solid State Ionics, 81 (1995) 97-109. 

X.-S. Chen, H. Nishide, K. Oyaizu, E. Tsuchida, Highly selective oxygen transport through a cobalt porphyrin hquid membrane,. Phys. Chem. B 101 (1997) 5725-5729. 

H. Nishide, H. Kawakami, T. Suzuki, Y. Azechi, E. Tsuchida, Enhanced stabihty and facilitation in oxygen transport through cobalt porphyrin polymer membranes, Macromolecules 23 (15) (1990) 3714-3716. 

However, for mixed oxygen ion-electron conducting materials the surface processes can become rate limiting for oxygen transport through the membrane rather than bulk diffusion. Under surface reaction we understand the... 

Easily presented in Fig. 1, electrode reactions are much more difficult (see also Solid Electrolytes Cells, Electrochemical Cells with Solid Electrolytes in Equilibrium). The mass of oxygen transported through gas-dense solid electrolyte membranes (OT02) can be exactly determined by the measurement of electrical current (I) following due to the Faraday s law ... 

Diethelm, S. and van Herle, J. (2004) Oxygen transport through dense Lao.6Sro.4Feo.8Coo.203 a perovskite-type permeation membranes. /. Eur. Ceram. Soc., 24, 1319-1323. 

Identification of the rate determining step in oxygen transport through La,i, )Sr,fe,i yjGayOa a perovskite membranes./. Membr. Sci.,... 

Ten Elshof, E.J., Bouwmeester, H.J.M., and Verweij, H., Oxygen transport through Jjaj, SrJe03 5 membranes. 11. Permeation in air/C0,C02 gradients. Solid State Ionics, 1996, 89, 81-92. 

Accordingly, the total decomposition of N2O can be achieved in the membrane reactor [88]. To increase the driving force for oxygen transport through the membrane, methane or ethane can be fed to the permeate side of the membrane to consume the permeated oxygen. Figure 5.11... 

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