MIEC sealing

Figure 16.1 Different types of MIEC laboratory scale membrane reactors (a) short hollow fiber with Au sealing in the hot zone, (b) short tubular membrane, and (c) disk membrane.

Oxygen permeation measurements and sealing dense MIEC ceramic membranes... 

While this sealing technique, as all the sealants based on ceramic/glass, is very attractive for laboratory/small-scale applications, a more robust technique has to be applied in order to exploit the MIEC membranes at larger scales. Among the various sealing techniques proposed so far, the reactive air brazing (RAB) seems to be the most appropriate for industrial applications. 

As the RAB is usually carried out at temperatures above 950-1000 °C, the resulting seal can work at the reactor operating conditions. Chen et al. [64] recently reported an interesting work on RAB sealing of MIEC membranes. An example of the sealed membrane is shown in Figure 33.16. 

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