Fabrication of CO2-tolerant SrFe0.8Nb0.2O3-δ/SrCo0.9Nb0.1O3-δ dual-layer 7-channel hollow fiber membrane by co-spinning and one-step thermal process

Perspectives on achievements and challenges of oxygen transport dual‐functional membrane reactors

“…The enhancement of mechanical strength in hollow fibers can be achieved by increasing their crosssectional area through a multichannel configuration. [62][63][64][65] This design can provide a larger permeation area and higher membrane-packing density within a given volume. Notably, multichannel hollow fibers utilizing perovskite oxides were first developed by Jin's group for efficient production of pure oxygen.…”

“…52,67 Additionally, a recent advancement in the field includes the development of SrFe 0.8 Nb 0.2 O 3−δ (SFN)/SrCo 0.9 Nb 0.1 O 3−δ (SCN) dual-layered seven-channel hollow fiber membranes, fabricated through a co-spinning process and one-step thermal processing (see Figure 2d). 65 These dual-layered seven-channel hollow fiber membranes exhibit superior mechanical strength and high oxygen permeability, with the porous SFN outer layer effectively preventing performance degradation under a CO 2 -containing sweep gas in comparison to SCN membranes. Moreover, the SFN/SCN dual-layered membranes exhibit a stable operation for over 200 h in the 20% CO 2 -80% He sweep gas, maintaining the high oxygen permeation flux.…”

“…Moreover, the SFN/SCN dual-layered membranes exhibit a stable operation for over 200 h in the 20% CO 2 -80% He sweep gas, maintaining the high oxygen permeation flux. 65 The advantageous properties of multichannel hollow fiber membranes, including enhanced mechanical strength, permeation flux, and packing density, establish them as reliable and economically viable options. Consequently, these membranes represent a significant advancement and a promising future direction in membrane technology, holding potential for scalability and broader applications.…”

“…The enhancement of mechanical strength in hollow fibers can be achieved by increasing their cross‐sectional area through a multichannel configuration 62–65 . This design can provide a larger permeation area and higher membrane‐packing density within a given volume.…”

“… 65 These dual‐layered seven‐channel hollow fiber membranes exhibit superior mechanical strength and high oxygen permeability, with the porous SFN outer layer effectively preventing performance degradation under a CO 2 ‐containing sweep gas in comparison to SCN membranes. Moreover, the SFN/SCN dual‐layered membranes exhibit a stable operation for over 200 h in the 20% CO 2 –80% He sweep gas, maintaining the high oxygen permeation flux 65 . The advantageous properties of multichannel hollow fiber membranes, including enhanced mechanical strength, permeation flux, and packing density, establish them as reliable and economically viable options.…”