Oxygen carrier-transport materials

Perovskites as Oxygen Carrier-Transport Materials for Hydrogen and Carbon Monoxide Production by Chemical Looping Processes... 

Perovskites as Oxygen Carrier-Transport Materials for Hydrogen... 

One promising approach to facilitated transport pioneered by Nishide and coworkers at Wasada University is to chemically bind the oxygen carrier to the polymer backbone, which is then used to form a dense polymer film containing no solvent [28], In some examples, the carrier species is covalently bonded to the polymer matrix as shown in Figure 11.29(a). In other cases, the polymer matrix contains base liquids which complex with the carrier molecule through the base group as shown in Figure 11.29(b). Because these films contain no liquid solvent, they are inherently more stable than liquid membranes and also could be formed into thin films of the selective material in composite membrane form. So far the selectivities and fluxes of these membranes have been moderate. 

The experimental techniques which are used for characterization of polymer conductivity are in most cases the techniques adopted from classical physics of insulators, semiconductors, and conductors however, the interpretation of the results requires an imderstanding of the different nature of organic and disordered materials. In particular one has to take into account that in most polymers the charge carrier density and mobility are very low the charge carrier transport has dispersive character and also that polymers are sensitive to enviromnen-tal conditions and can be easily degraded by light, heat, oxygen, moisture, and so Development of new techni-... 

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