Dual-phase perovskite membranes

There are several advantages to using a dual-phase membrane over a singlephase mixed electronic ionic conductor. These include the fact that the ionic conductors such as YSZ are much more chemically and thermally stable compared to most perovskites. Thus, dual-phase membranes are Ukely to be able to tolerate the harsh conditions of an oxygen separation device. They also show good tolerance to both CO2 and steam. The difficulty comes in the selection of an electronically conducting material. The cost of noble metals makes their incorporation into commercial devices unlikely. Therefore, the electron-conducting phase is Umited to a... 

The development of high-temperature membrane solutions for CO2 capture relying on perovskite membranes requires a proper description of mass transfer within the membranes. To this aim, this chapter provides a compilation of models accounting for mass transfer within single- and dual-phase membranes, as... 

Li, H., Zhu, X., Liu, Y., Wang, W., and Yang, W. (2014) Comparative investigation of dual-phase membranes containing cobalt and iron-based mixed conducting perovskite for oxygen permeation. /. Membr. ScL, 462,... 

Figure 39.5 Permeance versus permeability representations for O2 transport within membranes based on single- and dual-phase Co-containing perovskites (PVK-Co and PVK-DF-Co), single- and dual-phase Co-free perovskites (PVK-Co-free and PVK-DF-Co) and...

The manufacture of DPMs based on infiltrated molten carbonates in the porosity of perovskite membranes constitutes the most recent and innovative application of perovskites for CO2 capture. Since the first studies reported by Wade and coworkers [33] and Lin and coworkers [34], many efforts have been made to develop stable high-flux membranes for CO2 separation. Table 39.5 collects the most remarkable results, whereas Figvue 39.12 plots the permeance versus permeability plots for dual-phase perovskite-carbonate materials compared with low-temperature CO2 separating membranes (zeolites and MOFs/ZIFs). 

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