Insights into the design of nineteen-channel perovskite hollow fiber membrane and its oxygen transport behaviour

Highly efficient preparation of Ce0.8Sm0.2O2-δ–SrCo0.9Nb0.1O3-δ dual-phase four-channel hollow fiber membrane via one-step thermal processing approach

“…Unlike tubular membranes and disk-like membranes, the membrane area of multi-channel hollow fiber membrane for oxygen permeation flux calculation is difficult to obtain. To be consistent with the literatures [17,22], the outermost surface area of the multi-channel hollow fiber membrane was used for calculation in this study. The possible oxygen leakage due to imperfect sealing at high temperatures was monitored through the mole fraction of nitrogen (79 mol.…”

“…A composite of 60wt.%Ce 0.8 Sm 0.2 O 2-δ -40wt.%SrCo 0.9 Nb 0.1 O 3-δ (SDC-SCN) was selected as the target phase of the membrane, due to its high oxygen permeability and carbon dioxide tolerance proved in our previous study [16]. Meanwhile, a multi-channel hollow fiber membrane geometry was selected due to its advantages in both oxygen permeation and mechanical robustness, when compared with alternative geometries such as disk-like membrane, tubular membrane and single-channel hollow fiber membrane [17][18][19].…”

Roadmap for Sustainable Mixed Ionic‐Electronic Conducting Membranes

“…[5,6] Oxygen permeable membranes have been intensively investigated in the past decades and can be generally grouped into two types: single-phase and dual-phase (see Figure 2). [1,2,[15][16][17][18][19][20][21][22][23][24]7,[25][26][27][28][29][30][31][32][33][34]8,[35][36][37][38][9][10][11][12][13][14] Currently, Ba-, Sr-, or Co-containing single-phase perovskite-type oxygen-transporting membranes (OTMs) with a general formula of ABO 3 show high oxygen permeation and generally have an oxygen permeation flux of more than 1 mL min −1 cm −2 at 1173 K for a 1 mm-thick membrane. [1,2] However, these OTMs have a poor stability in the presence of CO 2 due to the formation of carbonates.…”

“…The hollow-fiber membranes typically have 0.1-0.3 mm wall thicknesses and 1-2 mm outer diameters (with a hollow space inside). This configuration is considered as the most promising and practical one to improve O 2 permeation flux [2,6,19,20,[24][25][26][27]32] and it is also widely used for other applications such as CO 2 conversion and H 2 production (details can be found in the following Sections 4-7 and Section 10). Hollow-fiber membranes, which enable to achieve high oxygen permeability, are getting increasingly interesting and they have been intensively studied in recent years.…”

“…Hollow-fiber membranes, which enable to achieve high oxygen permeability, are getting increasingly interesting and they have been intensively studied in recent years. [1,2,34,6,19,20,[24][25][26][27]32] Table 1 shows the performance comparison of various MIEC membranes recently reported in literature. The membranes with hollow-fiber configuration exhibited the most excellent oxygen permeability and stability, which should be a promising direction to be pursued in future.…”