CO 2 -enhanced hydrogen permeability of dual-layered A-site deficient Ba 0.95 Ce 0.85 Tb 0.05 Zr 0.1 O 3-δ -based hollow fiber membrane

CO2 and Steam-Assisted H2 Separation through BaCe0.8Y0.2O3−δ–Ce0.8Y0.2O2−δ Hollow Fiber Membranes

“…The joint effects of RWGS and water splitting maximize the H 2 permeation fluxes (as shown in Figure ). As reported in the literature, the effect of steam or carbon dioxide on the gas permeability of MPEC membranes is varied; ,− such a difference may be sourced from the different membrane material compositions and the functions of oxygen vacancy playing in the gas permeation mechanism.…”

“…Shang et al prepared a Ba 0.95 Ce 0.85 Tb 0.05 Zr 0.1 O 3−δ (BCTbZ) asymmetric hollow fiber membrane via a phase inversion and co-sintering technique. The dense layer of the membrane was only 14 μm, thus achieving H 2 flux of 0.41 mL cm –2 min –1 at 900 °C using 50% H 2 –He as feed gas . Surface modification is another effective method to enhance the hydrogen permeability of MPEC membranes.…”

“…The consumption of H 2 in the permeate side can enlarge the partial pressure gradient, the driving force for permeation. Shang et al studied the hydrogen permeability of a BCTbZ/Ni–BCTbZ hollow fiber membrane using a 7% CO 2 –N 2 mixture as the sweep gas . As a result of the presence of a reverse water–gas shift (RWGS) reaction, the addition of CO 2 increased the H 2 permeation flux by 10% compared to pure N 2 as the sweep gas, reaching 0.45 mL cm –2 min –1 at 900 °C .…”

“…Shang et al studied the hydrogen permeability of a BCTbZ/Ni–BCTbZ hollow fiber membrane using a 7% CO 2 –N 2 mixture as the sweep gas . As a result of the presence of a reverse water–gas shift (RWGS) reaction, the addition of CO 2 increased the H 2 permeation flux by 10% compared to pure N 2 as the sweep gas, reaching 0.45 mL cm –2 min –1 at 900 °C . Wang et al fabricated a Ti 4 O 7 -doped SrCe 0.9 Y 0.1 O 3−δ hollow fiber membrane, which was stable under a CO 2 atmosphere .…”

Production strategies of asymmetric BaCe0.65Zr0.20Y0.15O3-δ – Ce0.8Gd0.2O2-δ membrane for hydrogen separation

“…However, the main product obtained by these processes is syngas, therefore to obtain pure H2 a separation step is mandatory [2]. In this context, H2 permeation membranes based on Mixed Proton-Electron Conductor ceramics (MPEC) [3][4][5][6][7][8], thanks to their high chemical and thermal stability, represent one of the most promising alternative to be easily integrated in pre-existent plants [9][10].…”