Excellent and CO$_2$$_{0.85}$Nd$_{0.1}$Cu$_{0.05}$O$_{2-\delta}$-Nd$_x$Sr$_{1-x}$Fe$_{1-y}$Cu$_y$O$_{3-\delta}$ dual-phase oxygen transport membranes
Journal of Membrane Science, 2024,696,122485 Oxygen transport membranes(OTMs)have provided great opportunities in the last decades but are suffering from the trade-off effect between stability and oxygen permeability. Here, we report a group of new planar dual-phase mixed ionic-electronic conducting...
Saved in:
Main Authors | , , , , , , , , , , , , |
---|---|
Format | Journal Article |
Language | English |
Published |
22.08.2024
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Journal of Membrane Science, 2024,696,122485 Oxygen transport membranes(OTMs)have provided great opportunities in the last
decades but are suffering from the trade-off effect between stability and
oxygen permeability. Here, we report a group of new planar dual-phase mixed
ionic-electronic conducting (MIEC) OTMs consisting of
CO$_2$$_{0.85}$Nd$_{0.1}$Cu$_{0.05}$O$_2$ (CNCO) and
Nd$_x$Sr$_{1-x}$Fe$_{1-y}$Cu$_y$O$_3$(NSFCO; $x = 0.4, 0.6$; $y = 0.05, 0.1$)
phases, showing excellent oxygen permeability while comparable CO$_2$-resistant
stability. The substitution of Cu as a bifunctional additive decreases the
sintering temperature and enhances bulk diffusion and oxygen permeability with
the co-doping of Nd.The oxygen permeation fluxes reached 2.62 and 1.52 mL
min$^{-1}$ cm$^{-2}$ at 1000$^\circ$C through the optimal
60wt%Ce0.85Nd0.1Cu0.05O2-40wt%Nd0.4Sr0.6Fe0.9Cu0.1O3 (CNCO-NSFCO41) composition
with He and CO$_2$ sweeping, respectively, higher than all reported dense
dual-phase OTMs. Such excellent CO$_2$-tolerant permeability meets the needs of
potential industrial applications. Analysis with Zhu's oxygen permeation model
shows lower bulk diffusion resistance of CNCO-NSFCO41 than that of reported
60wt%Ce0.85Pr0.1Cu0.05O2-40wt%Pr0.4Sr0.6Fe0.9Cu0.1O3(CPCO-PSFCO41)and more
limitation by the interfacial exchange at high temperature. All the prepared
OTMs also show good long-term stability over 100 hours in both atmospheres. Our
results confirm the excellent oxygen permeability and stability under a
high-concentration CO2 atmosphere, providing a material candidate for CO2
capture in oxyfuel combustion. |
---|---|
DOI: | 10.48550/arxiv.2408.12164 |