Oxygen membrane

It is well known that dense ceramic membranes made of the mixture of ionic and electron conductors are permeable to oxygen at elevated temperatures. For example, perovskite-type oxides (e.g., La-Sr-Fe-Co, Sr-Fe-Co, and Ba-Sr-Co-Fe-based mixed oxide systems) are good oxygen-permeable ceramics. Figure 2.11 depicts a conceptual design of an oxygen membrane reactor equipped with an OPM. A detail of the ceramic membrane wall... 

Schematics of an oxygen membrane reactor for catalytic POx of methane. A blown up section on the left-hand side shows the details of the ceramic membrane wall explaining the mechanism of oxygen permeation across the membrane. /- is the chemical potential of oxygen and ai and

Rotariu et al. [56] Alcoholic beverages were placed on the oxygen membrane and covered with a dialysis membrane (DM) and fixed with a rubber ring Potentiometric oxygen electrode ... 

Subsequent studies of these proton-transport membranes will be conducted over a wide range of hydrogen partial pressures on the permeate side. This will allow assessment of whether the driving force for hydrogen permeance is more accurately represented as the natural logarithm of the ratio of the hydrogen partial pressures on the retentate and permeate sides, as observed in ion transport oxygen membranes. 

A dilute solution of a preformed polymer can be separately cast onto water, preferably from a surface active spreading solvent such as cyclohexanone. The thin film is then laminated onto a porous support layer. This approach was originally developed by Camell and Cassidy (40) and was first utilized by Cadotte and Francis in 1964 to coat microporous CA membranes. Petersen also utilized this approach to cast thin films of ethyl xellulose perfluorobutyrate which were then laminated to CelgartT and Tyvek supports for use as blood oxygenation membranes (41). 

The applicability of oxygen membrane materials depends essentially on their oxygen permeation fluxes. The dependence of the flux density j02 on the oxygen pressure difference across the membrane of thickness L can be calculated by the using of the measured total conductivity o and calculated values Oi for the ion conductivity. 

Disposable syringes, blood oxygenator membrane, suture, nonwoven fabric, and artificial vascular grafts... 

Figure 38. A schematic illustration of the enzymic glucose electrode based on the oxygen membrane sensor (1) a layer of immobilized glucose oxidase (2) semipermeable Teflon membrane (3) reference electrode (4) cathode.

Shao, Z.P., Yang, W.S., Cong, Y. et al. (2000) Investigation of the permeation behavior and stability of a Bao.sSro.sCoo.gFco 203 oxygen membrane. Journal of Membrane Science, 172, 177-188. 

Oxygen membrane electrode (single-probe measuring cell). The construction of such an electrode varies with the manufacturer. The most impor-... 

Key words hydrogen production, power generation, COj capture, membrane integration, oxygen membranes for oxy-combustion, hydrogen separation membrane reactors. 

Oxygen membranes for integrated gasification combined cycle (IGCC) plants... 

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