Hydrogen permeation performance of dual-phase protonic-electronic conducting ceramic membrane with regular and independent transport channels

Ion–Conducting Ceramic Membrane Reactors for the Conversion of Chemicals

“…This suggests that reducing the interfacial resistance between the two phases of a dual–phase membrane is important for improving its performance in hydrogen permeation [ 75 ]. A novel dual–phase SrCe 0.9 Y 0.1 O 3 –Ce 0.8 Sm 0.2 O 2 (SCY–SDC)–laminated membrane was prepared, which consisted of alternating films of SCY and SDC phases (as shown in Figure 5 ) [ 76 ]. This laminated membrane was found to exhibit higher hydrogen (H 2 ) flux than a conventional SCY–SDC dual–phase membrane, due to the shortened bulk diffusion distance for protons and electrons.…”

Dual-Phase Mixed Protonic-Electronic Conducting Hydrogen Separation Membranes: A Review

“…Short-circuit pathways were formed along with the longitudinal direction of the membrane; the diffusion paths of protons and electrons were largely decreased and the interface between the two phases was remarkably reduced ( Figure 12 ). As a result, the membrane showed excellent hydrogen permeability, significantly higher than the SCY-SDC membrane prepared by conventional single synthesis [ 74 ].…”

“… The schematic diagram of the phase distribution and the transport routs of protons and electrons, ( a ) dual-phase membrane prepared by simply powder blending, ( b ) laminated dual-phase membrane with short circuit pathways [ 74 ]. …”

Preparation of BCYF0.10–YDC/BCYF0.10–Ni dual-layer hollow fiber membrane for dry reforming of methane and hydrogen purification

“…Mortalò et al 25 The H 2 permeation flux and stability of membranes can also be improved by establishing an asymmetric structure with independent distribution of proton-electron conducting phases, porous support layers, and ultrathin dense layers. [26][27][28][29][30] The H 2 permeation process of ceramic H 2 permeation membrane is mainly controlled by bulk diffusion and surface exchange reactions, and the reduction of membrane thickness and modification to the surface structure can enhance the H 2 permeation flux of ceramic membranes. Hollow fiber (HF) membranes are easier to seal at their ends and provide greater effective membrane area per unit volume at a thickness of about 200 μm compared to flat membranes.…”