Abstract The mixed protonic–electronic conductor of BaCe 0.5 Fe 0.5 O 3− δ can be automatically decomposed into a dual‐phase material of the cerium‐rich oxide BaCe 0.85 Fe 0.15 O 3− δ (BCFe8515) and the iron‐rich oxide BaCe 0.15 Fe 0.85 O 3− δ (BCFe1585). The BaCe 0.5 Fe 0.5 O 3− δ membrane possessed an extremely high hydrogen (H 2 ) permeation flux, but poor stability. Therefore, in this work, for the first time, the nonmetal P is doped to increase the proportion of the BaCe 0.85 Fe 0.15 O 3− δ (P‐doped Ce‐rich) phase to improve the stability of the dual‐phase membrane. The developed dual‐phasic ceramic membranes of BaCe 0.5 Fe 0.5− x P x O 3− δ (BCFeP x ) ( x = 0, 0.025, 0.05, 0.1) exhibit enhanced stability compared to their parent oxides. Under the condition of 950°C, feed gas with dry 50% H 2 ‐50% He and sweep gas with wet Ar, the H 2 permeation flux of BCFeP 0.05 membrane stabilized at 1.56 mL min −1 cm −2 after the long‐term stability test for 480 h. The enhanced stability resulted from the increase of the P‐doped Ce‐rich phase content and the inhibition of Fe 2 O 3 phase precipitation from the BaCe 0.15 Fe 0.85 O 3− δ (P‐doped Fe‐rich) phase in the reducing atmosphere by doping non‐metal P element.

10.1111/jace.19538

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Citations (2)

Various influence of surface modification on permeability and phase stability through an oxygen permeable membrane

Journal of Membrane Science (2018)

Jian Xue Guowei Weng Li Chen Yanpeng Suo Yanying Wei

Oxygen permeability

Surface Modification

Semipermeable membrane

Oxygen transport

10.1016/j.memsci.2018.12.040

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Citations (31)

Mathematical Modeling of NaCl Scaling Development in Long-Distance Membrane Distillation for Improved Scaling Control

Materials (2024)

Jingcheng Cai Xingsen Mu Jian Xue Jiaming Chen Zeman Liu

Membrane distillation is a novel membrane-based separation technology with the potential to produce pure water from high-salinity brine. It couples transport behaviors along the membrane and across the membrane. The brine in the feed is gradually concentrated due to the permeate flux across the membrane, which is a significant factor in initiating the scaling behavior on the membrane surface along the feed flow direction. It is of great interest to investigate and estimate the development of scaling on the membrane surface. This work specifically focuses on a long-distance membrane distillation process with a sodium chloride solution as the feed. A modeling approach has been developed to estimate the sodium chloride scaling development on the membrane surface along the flow direction. A set of experiments was conducted to validate the results. Based on mathematical simplification and analytical fitting, a simplified model was summarized to predict the initiating position of sodium chloride scaling on the membrane, which is meaningful for scaling control in industrial-scale applications of membrane distillation.

Membrane Distillation

Brine

Membrane Technology

Nanofiltration

10.3390/ma17153629

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Graphene oxide-modified g-C3N4 nanosheet membranes for efficient hydrogen purification

Chemical Engineering Journal (2021)

Yisa Zhou Ya Zhang Jian Xue Rui Wang Zongjie Yin

Permeance

Nanosheet