Oxygen-selective ceramic membrane

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... 

Liu S, Gavalas GR. Oxygen selective ceramic hollow fiber membranes. J Membr Sci. 2005 246 103. 

Wang, H., Feldhoff, A., Caro, J., et al. (2009). Oxygen Selective Ceramic Hollow Fiber Membranes for Partial Oxidation of Methane, AIChE J., 55, pp. 2657-2664. 

Liu, S.M. and G.R. Gavalas, Oxygen selective ceramic hoUow fiber membranes. Journal of Membrane Science, 2005. 246(1) 103-108. 

Fig. 7. Methane conversion, CO selectivity, and oxygen flux through the ceramic membrane during the partial oxidation of methane in a ceramic membrane reactor (see Fig. 6). Reaction conditions temperature, 1148 K catalyst, 300 mg of LiLaNi0JC/y-Al203 air flow rate, 300 mL min-1 (NTP) feed gas molar ratio, CH4/He = 1/1 feed flow rate, 42.8 mL min-1 (NTP) (72).

A recent development of a ceramic membrane appears to be promising for selectively removing oxygen from air. Multi-channel membrane elements have been fabricated for that purpose [Anonymous, 1995]. The membrane has the potential for reducing the cost of converting natural gas to synthesis gas. 

GUr T.M., Belzner A. and Huggins R.A., A new class of oxygen selective chemically driven nonporous ceramic membranes. Part I. A-siie doped perovskites, J. Membr. Sci. 75 151 (1992). 

The considerations in this chapter were mainly prompted by the potential application of mixed-conducting perovskite-type oxides to be used as dense ceramic membranes for oxygen delivery applications, and lead to the following general criteria for the selection of materials... 

The packed bed ceramic membrane reactor configuration (PBMR) has been chosen as the reactor set-up (see Section 14.2.2). In the PBMR configuration three possible sub-configurations can be envisioned for a specific sweep gas in combination with a hydrogen or oxygen selective membrane for the dehydrogenation of ethylbenzene. These sub-configurations are shown in Fig. 14.10. 

The process that is the subject of this article consists of the use of high temperature ceramic membranes that selectively transport oxygen. They are referred to with several acronyms of which ITM (Ion Transport Membranes), OTM (Oxygen Transport Membranes) and MIEC (Mixed Ionic Electronic Conducting) membranes prevail. We will use ITM throughout this article. 

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