Details
| Original language | English |
|---|---|
| Article number | 62 |
| Number of pages | 13 |
| Journal | Frontiers of Chemical Science and Engineering |
| Volume | 18 |
| Issue number | 6 |
| Early online date | 15 Apr 2024 |
| Publication status | Published - Jun 2024 |
Abstract
In this study, perovskite-type La0.7Ca0.3Co0.3 Fe0.6M0.1O3−δ (M = Cu, Zn) powders were synthesized using a scalable reverse co-precipitation method, presenting them as novel materials for oxygen transport membranes. The comprehensive study covered various aspects including oxygen permeability, crystal structure, conductivity, morphology, CO2 tolerance, and long-term regenerative durability with a focus on phase structure and composition. The membrane La0.7Ca0.3Co0.3Fe0.6Zn0.1O3−δ exhibited high oxygen permeation fluxes, reaching up to 0.88 and 0.64 mL·min−1cm−2 under air/He and air/CO2 gradients at 1173 K, respectively. After 1600 h of CO2 exposure, the perovskite structure remained intact, showcasing superior CO2 resistance. A combination of first principles simulations and experimental measurements was employed to deepen the understanding of Cu/Zn substitution effects on the structure, oxygen vacancy formation, and transport behavior of the membranes. These findings underscore the potential of this highly CO2-tolerant membrane for applications in high-temperature oxygen separation. The enhanced insights into the oxygen transport mechanism contribute to the advancement of next-generation membrane materials. (Figure presented.)
Keywords
- energy barrier, formation energy, membrane, oxygen ions diffusion, oxygen permeation, oxygen vacancy, perovskite
ASJC Scopus subject areas
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In: Frontiers of Chemical Science and Engineering, Vol. 18, No. 6, 62, 06.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Advancing oxygen separation
T2 - insights from experimental and computational analysis of La0.7Ca0.3Co0.3Fe0.6M0.1O3−δ (M = Cu, Zn) oxygen transport membranes
AU - Chen, Guoxing
AU - Liu, Wenmei
AU - Widenmeyer, Marc
AU - Yu, Xiao
AU - Zhao, Zhijun
AU - Yoon, Songhak
AU - Yan, Ruijuan
AU - Xie, Wenjie
AU - Feldhoff, Armin
AU - Homm, Gert
AU - Ionescu, Emanuel
AU - Fyta, Maria
AU - Weidenkaff, Anke
N1 - Funding Information: G.C., M.W., and A.W. kindly thank the Federal Ministry of Education and Research for financial support during PiCK project (Grant No. 03SFK2S3B). G.C., G.H., and A.W. kindly thank the Hydrogen performance center in Hesse for financial support during the Green materials for Green H2 project. M.W. and A.W. kindly thank the Federal Ministry of Education and Research for financial support during the NexPlas project (Grant No. 03SF0618B). The simulations presented in this work were performed on the computational resource For HLR II funded by the Ministry of Science, Research and the Arts Baden-W\u00FCrttemberg and the Deutsche Forschungsgemeinschaft. W.L. and M.F. are thankful for being granted access to these facilities.
PY - 2024/6
Y1 - 2024/6
N2 - In this study, perovskite-type La0.7Ca0.3Co0.3 Fe0.6M0.1O3−δ (M = Cu, Zn) powders were synthesized using a scalable reverse co-precipitation method, presenting them as novel materials for oxygen transport membranes. The comprehensive study covered various aspects including oxygen permeability, crystal structure, conductivity, morphology, CO2 tolerance, and long-term regenerative durability with a focus on phase structure and composition. The membrane La0.7Ca0.3Co0.3Fe0.6Zn0.1O3−δ exhibited high oxygen permeation fluxes, reaching up to 0.88 and 0.64 mL·min−1cm−2 under air/He and air/CO2 gradients at 1173 K, respectively. After 1600 h of CO2 exposure, the perovskite structure remained intact, showcasing superior CO2 resistance. A combination of first principles simulations and experimental measurements was employed to deepen the understanding of Cu/Zn substitution effects on the structure, oxygen vacancy formation, and transport behavior of the membranes. These findings underscore the potential of this highly CO2-tolerant membrane for applications in high-temperature oxygen separation. The enhanced insights into the oxygen transport mechanism contribute to the advancement of next-generation membrane materials. (Figure presented.)
AB - In this study, perovskite-type La0.7Ca0.3Co0.3 Fe0.6M0.1O3−δ (M = Cu, Zn) powders were synthesized using a scalable reverse co-precipitation method, presenting them as novel materials for oxygen transport membranes. The comprehensive study covered various aspects including oxygen permeability, crystal structure, conductivity, morphology, CO2 tolerance, and long-term regenerative durability with a focus on phase structure and composition. The membrane La0.7Ca0.3Co0.3Fe0.6Zn0.1O3−δ exhibited high oxygen permeation fluxes, reaching up to 0.88 and 0.64 mL·min−1cm−2 under air/He and air/CO2 gradients at 1173 K, respectively. After 1600 h of CO2 exposure, the perovskite structure remained intact, showcasing superior CO2 resistance. A combination of first principles simulations and experimental measurements was employed to deepen the understanding of Cu/Zn substitution effects on the structure, oxygen vacancy formation, and transport behavior of the membranes. These findings underscore the potential of this highly CO2-tolerant membrane for applications in high-temperature oxygen separation. The enhanced insights into the oxygen transport mechanism contribute to the advancement of next-generation membrane materials. (Figure presented.)
KW - energy barrier
KW - formation energy
KW - membrane
KW - oxygen ions diffusion
KW - oxygen permeation
KW - oxygen vacancy
KW - perovskite
UR - http://www.scopus.com/inward/record.url?scp=85190500929&partnerID=8YFLogxK
U2 - 10.1007/s11705-024-2421-5
DO - 10.1007/s11705-024-2421-5
M3 - Article
AN - SCOPUS:85190500929
VL - 18
JO - Frontiers of Chemical Science and Engineering
JF - Frontiers of Chemical Science and Engineering
SN - 2095-0179
IS - 6
M1 - 62
ER -