TY - JOUR
T1 - Exploring the potential of decade-air exposed perovskite membranes through sustainable recycling approaches
AU - Wu, Di
AU - Shen, Chao
AU - Zhou, Wanglin
AU - Tan, Jinkun
AU - Niu, Yongqiang
AU - Liu, Zhengkun
AU - Zhang, Guangru
AU - Jin, Wanqin
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/6
Y1 - 2024/6
N2 - The stability of perovskite-based oxygen permeable membranes under long-term storage conditions, especially in the presence of water and carbon dioxide, presents a significant challenge. In this study, we examined the impact of extended storage (more than 10 years) on Nb2O5-doped SrCo0.8Fe0.2O3-δ (10Yr-SCFN) membranes. To unlock their industrial application potential, various approaches involving a combination of physical and chemical treatments to restore membrane properties in aged membranes are proposed and validated, while systematically investigating the evolution in chemical composition, microstructure, mechanical strength, and oxygen permeability. The 10Yr-SCFN membranes can be effectively restored through the secondary sintering method, wherein the membrane is first powdered and then calcinated in static air to maximize the removal of impurities. The mechanical strength and oxygen permeability reach levels of 30 MPa and 1.2 ml cm−2 min−1 (900 °C), respectively, comparable to the performance of freshly prepared membranes. These findings shed some light on the potentiality of sustainable recycling of perovskite membranes and provide theoretical and technical support for the practical application and industrialization of oxygen permeable membranes.
AB - The stability of perovskite-based oxygen permeable membranes under long-term storage conditions, especially in the presence of water and carbon dioxide, presents a significant challenge. In this study, we examined the impact of extended storage (more than 10 years) on Nb2O5-doped SrCo0.8Fe0.2O3-δ (10Yr-SCFN) membranes. To unlock their industrial application potential, various approaches involving a combination of physical and chemical treatments to restore membrane properties in aged membranes are proposed and validated, while systematically investigating the evolution in chemical composition, microstructure, mechanical strength, and oxygen permeability. The 10Yr-SCFN membranes can be effectively restored through the secondary sintering method, wherein the membrane is first powdered and then calcinated in static air to maximize the removal of impurities. The mechanical strength and oxygen permeability reach levels of 30 MPa and 1.2 ml cm−2 min−1 (900 °C), respectively, comparable to the performance of freshly prepared membranes. These findings shed some light on the potentiality of sustainable recycling of perovskite membranes and provide theoretical and technical support for the practical application and industrialization of oxygen permeable membranes.
KW - High temperature sintering
KW - Mixed-conducting membrane
KW - Oxygen permeable membrane
KW - Perovskite oxide
KW - Recycling
UR - http://www.scopus.com/inward/record.url?scp=85190760355&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2024.151406
DO - 10.1016/j.cej.2024.151406
M3 - 文章
AN - SCOPUS:85190760355
SN - 1385-8947
VL - 489
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 151406
ER -