Guidelines for selecting coating materials for a high oxygen permeation flux in a fluorite-rich dual-phase membrane

Kwon, Y.; Na, Beom Tak; Park, Jeong Hwan; Yun, Kyong Sik; Hong, Seri; Yu, Ji Haeng; Joo, Jong Hoon

doi:10.1016/j.memsci.2017.04.036

Cited by 17 publications

(4 citation statements)

References 48 publications

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“…In our previous study, the oxygen flux of the LSM20 membrane was greatly enhanced by the p-type perovskite coating layers (LSC, LSCF, and STF) and the membrane coated with LSC showed the greatest improvement in the oxygen flux. 25 Thus, LSC was selected as the representative coating material among the p-type perovskite oxides in this study in order to investigate the enhancement mechanism of the oxygen flux by the coating layer. Zhu et al developed an oxygen permeation model that expressed the bulk diffusion and surface exchange kinetics of the oxygen permeation as the resistances.…”

Section: Resultsmentioning

confidence: 99%

“…Identification of the role of the surface exchange reactions is necessary to understand the enhancement mechanism of the oxygen flux by surface modification. In our previous study, the oxygen flux of the LSM20 membrane was greatly enhanced by the p -type perovskite coating layers (LSC, LSCF, and STF) and the membrane coated with LSC showed the greatest improvement in the oxygen flux . Thus, LSC was selected as the representative coating material among the p -type perovskite oxides in this study in order to investigate the enhancement mechanism of the oxygen flux by the coating layer.…”

Section: Results and Discussionmentioning

confidence: 99%

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Elucidation of the Oxygen Surface Kinetics in a Coated Dual-Phase Membrane for Enhancing Oxygen Permeation Flux

Park

et al. 2017

ACS Appl. Mater. Interfaces

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The dual-phase membrane has received much attention as the solution to the instability of the oxygen permeation membrane. It has been reported that the oxygen flux of the dual-phase membrane is greatly enhanced by the active coating layer. However, there has been little discussion about the enhancement mechanism by surface coating in the dual-phase membrane. This study investigates the oxygen flux of the CeGdO-LaSrMnO (GDC 80 vol %/LSM 20 vol %) composite membrane depending on the oxygen partial pressure (P) to elucidate the mechanism of enhanced oxygen flux by the surface modification in the fluorite-rich phase dual-phase membrane. The oxygen permeation resistances were obtained from the oxygen flux as a function of P using the oxygen permeation model. The surface exchange coefficient (k) and the bulk diffusion coefficient (D) were calculated from these resistances. According to the calculated k and D values, we concluded that the active coating layer (LaSrCoO) significantly increased the k value of the membrane. Furthermore, the surface exchange reaction on the permeate side was more sluggish than that at the feed side under operating conditions (feed: 0.21 atm/permeate side: 4.7 × 10 atm). Therefore, the enhancement of the oxygen surface exchange kinetics at the permeate side is more important in improving the oxygen permeation flux of the thin film-based fluorite-rich dual-phase membrane. These results provide new insight about the function of the surface coating to enhance the oxygen permeation flux of the dual-phase membrane.

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Elucidation of the Oxygen Surface Kinetics in a Coated Dual-Phase Membrane for Enhancing Oxygen Permeation Flux

Park

et al. 2017

ACS Appl. Mater. Interfaces

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“…Theoretically, such a MIEC OPM is capable of producing oxygen with a purity of 100% at a certain temperature. More importantly, the cost of oxygen production is low. − Compared to the low-temperature distillation method, a cost reduction of 35% is achieved using MIEC OPM technology for oxygen production . Moreover, at high temperatures, the MIEC membrane has excellent catalytic performance in oxygen permeation reactions.…”

Section: Introductionmentioning

confidence: 99%

“…16−18 Compared to the low-temperature distillation method, a cost reduction of 35% is achieved using MIEC OPM technology for oxygen production. 19 Moreover, at high temperatures, the MIEC membrane has excellent catalytic performance in oxygen permeation reactions. Therefore, the oxygen permeation process of MIEC OPMs can be coupled with the pure oxygen combustion process, thus omitting a separate oxygen separation device and greatly reducing the cost of CO 2 capture by at least 20%.…”

Section: Introductionmentioning

confidence: 99%

Toward High Performance Mixed Ionic and Electronic Conducting Perovskite-Based Oxygen Permeable Membranes: An Overview of Strategies and Rationales

Zhao

Pang

et al. 2023

Energy Fuels

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A ceramic oxygen-permeable membrane (OPM) with theoretical 100% selective oxygen permeation is attracting intensive attention in carbon capture technology, membrane reactors, industrial oxygen production, solid oxide fuel cells, and so on. Currently, much effort has been focused on exploring mixed ionic and electronic conducting (MIEC) perovskite oxides OPMs, such as Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3-δ . Considering the unsatisfactory oxygen permeability and stability of such perovskite-based OPMs for actual requirements, there is an urgent need to develop more active and stable OPMs, as well as modification strategies to enhance the performance of such OPMs. Herein, we provide an intime review of modification strategies toward MIEC OPMs, including membrane surface modification, membrane composition modification, and membrane configuration design. Followed on this, we highlight and summarize the working principle of OPMs and related membrane modification methods. Finally, the prospects and challenges of OPMs in this dynamic research area are assessed, shining some light on the effective modification of OPMs toward various applications.

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Recent Progress and Challenges in Mixed Ionic–Electronic Conducting Membranes for Oxygen Separation

Kwon

Nam

Lee

et al. 2022

Adv Energy and Sustain Res

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Carbon neutrality refers to the state of making net‐zero emissions of carbon dioxide (CO2), which is a key concept in tackling global warming. It can be achieved by offsetting carbon emissions as well as balancing reduced and emitted emissions. Globally, CO2 is emitted mainly from fossil fuel power plants. The use of carbon capture and storage technology, including pre‐, post‐, and oxy‐fuel combustion capture, in power plants can provide a carbon‐neutral strategy that allows for the sustainable use of fossil fuels while potentially reducing CO2 emissions. Oxy‐fuel combustion capture facilitates CO2 capture by simplifying combustion products through the reaction of recirculated flue gas with a high‐purity oxygen. Oxygen transport membranes, which produce pure oxygen by oxygen transport via oxides at high temperatures, have attracted increased interest because they can improve overall efficiency when integrated with oxy‐fuel combustion capture. Dual‐phase membranes with fluorite structure have greater potential for commercialization than perovskite‐based single‐phase membranes, which have poor chemical and mechanical properties. However, despite these advantages, their low oxygen permeability remains a critical issue. This review focuses on progress in the development of dual‐phase membranes and summarizes various approaches that can facilitate bulk diffusion and surface exchange, which affect the oxygen permeability.

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Guidelines for selecting coating materials for a high oxygen permeation flux in a fluorite-rich dual-phase membrane

Cited by 17 publications

References 48 publications

Elucidation of the Oxygen Surface Kinetics in a Coated Dual-Phase Membrane for Enhancing Oxygen Permeation Flux

Elucidation of the Oxygen Surface Kinetics in a Coated Dual-Phase Membrane for Enhancing Oxygen Permeation Flux

Toward High Performance Mixed Ionic and Electronic Conducting Perovskite-Based Oxygen Permeable Membranes: An Overview of Strategies and Rationales

Recent Progress and Challenges in Mixed Ionic–Electronic Conducting Membranes for Oxygen Separation

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