Experimental and modeling study of oxygen permeation modes for asymmetric mixed-conducting membranes

Chang, Xianfeng; Zhang, Chun; Dong, Xueliang; Yang, Chao; Jin, Wanqin; Xu, Nanping

doi:10.1016/j.memsci.2008.05.061

Cited by 24 publications

(10 citation statements)

References 24 publications

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“…It was observed that the O 2 flux is ten times higher in the supported MIEC membrane than in the self-supported membrane due to reducing of thickness. In another work 36 this group verified that O 2 flux is also dependent on the direction of the permeation, i.e., the oxygen flux is higher when permeates in the support-membrane direction, due to increasing surface exchange rate on the dense layer in the high partial pressure side. In other groups an improvement of the oxygen permeation flux in supported MIEC membranes produced by dry pressing was also observed by modifying the microstructure of porous support to straight pores in order to favor gas diffusion 41 , by adding a thin porous activity layer in the permeate membrane side to increase surface area for accelerating surface exchange reaction in the low pressure side 39 .…”

Section: Supported Miec Membranesmentioning

confidence: 93%

“…Thin perovskites MIEC membrane have been deposited on porous substrates using different techniques, e.g. dry pressing [36][37][38][39][40][41][42][43][44] , dip coating [45][46][47][48] , screen printing 49,50 , spray pyrolisis 51 , slip casting 52 , tape casting 20,53-56 and others [57][58][59][60][61][62][63] . Table 1 lists some of these studies including membrane and support fabrication method, material used for both components, as well as their thickness, pore-forming agent and pore size of the support and oxygen permeation fluxes in different operating conditions.…”

Section: Supported Miec Membranesmentioning

confidence: 99%

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Current developments of mixed conducting membranes on porous substrates

et al. 2013

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The fabrication of mixed ionic-electronic conducting (MIEC) ceramic-based membranes for oxygen separation has extensively increased in the last three decades as a promising alternative of clean energy delivery. In recent years, the interest on supported MIEC membranes has increased due to their attractive properties such as higher mechanical strength and oxygen flux compared to selfsupported membranes. This work presents a literature review on the development of supported MIEC membranes of perovskite structure. The concepts and transport mechanism of those membranes are explained and recent works on supported MIEC membranes are presented. Finally, manufacturing methods of self-supported membranes and their influence on oxygen permeation are discussed.

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Section: Supported Miec Membranesmentioning

confidence: 93%

Section: Supported Miec Membranesmentioning

confidence: 99%

Current developments of mixed conducting membranes on porous substrates

et al. 2013

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“…Membrane porosities were measured using the Archimedes method. In this study, the microchannel side of the microchanneled membranes and the porous side of the supported membranes were faced to the feed gas in all experiments because this test configuration can achieve higher oxygen permeation rates compared to the arrangement where the dense sides were faced to the feed gas [10,13]. The gas flow rates were controlled by mass flow controllers (MFC, AALBORG).…”

Section: Membrane Characterisation and Testingmentioning

confidence: 99%

Microchannel structure of ceramic membranes for oxygen separation

Shao

Wang

et al. 2016

Journal of the European Ceramic Society

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Microchanneled ceramic membranes have demonstrated superior performance in oxygen separation from air over conventional membranes. In this study, the contributions of the microchannel structure to the superior performance were investigated. Compared with supported membranes, the microchanneled membranes provide fast pathways within the channels for gas diffusion as compared to the tortuous interconnection of pore channels in the supported membranes. The walls of the numerous channels provide a large surface for facilitating oxygen dissociation, which was confirmed by varying the channel wall surface using mesh templates with different aperture sizes. In summary, the microchannel structure facilitates gas diffusion and provides a large membrane active surface, resulting in high performance in oxygen separation.

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“…The diffusion of oxygen molecules from gas phase to membrane surface may become rate determining for asymmetric membranes, where the pore structure, porosity, and support thickness all have critical impacts. Chang et al [149] showed that the effects of porous support are operation mode dependent. Namely, the oxygen permeation fluxes flowing from the support to the thin dense layer are higher than those in the opposite direction; these effects also depend on the thickness [149].…”

Section: Asymmetric Membranesmentioning

confidence: 99%

“…Chang et al [149] showed that the effects of porous support are operation mode dependent. Namely, the oxygen permeation fluxes flowing from the support to the thin dense layer are higher than those in the opposite direction; these effects also depend on the thickness [149].…”

Section: Asymmetric Membranesmentioning

confidence: 99%

Interfacial Phenomena in Mixed Conducting Membranes: Surface Oxygen Exchange‐ and Microstructure‐Related Factors

Zhu

Yang

2011

Solid State Electrochemistry II

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The transport behavior of ions, such as O 2À anions or protons, driven by chemical potential gradient across dense mixed conducting membranes is governed by many factors. In this chapter, the effects of surface exchange and ceramic microstructure are addressed. The surface-related aspects are discussed involving selected theoretical approaches and modeling. Relevant experimental methods are briefly described. The influence of microstructure on the gas permeation processes is analyzed for several types of mixed conducting membranes. The relationships between the membranes stability and their microstructure and surface exchange kinetics are considered on the basis of existing experimental data. IntroductionSolid-state nonmetallic conducting materials have been extensively developed and applied for various solid electrochemical devices during the last century. A large number of works reveal the great interest of researchers in energy storage and conversion devices, sensors, gas separation membranes, and other electrochemical applications of solid-state conducting materials [1-3]. The charge carriers may include electrons (or holes), protons, nonmetallic anions (such as O 2À , Cl À , etc.), and metal cations (such as Li þ , Na þ , etc.). The major groups of ion-conducting materials are discussed in the first volume of this handbook. Mixed conductors are the materials that have more than one type of mobile charge carriers (see Chapter 3 of the first volume). The high-temperature electrochemical applications of mixed conductors are, in particular, electrodes for solid oxide fuel cells (SOFCs) and other electrochemical devices, and ceramic membranes for oxygen, hydrogen, and carbon dioxide separation. For these types of applications, the solid should have high values of both the ionic/protonic and electronic conductivities. The electrode applications have been reviewed by many researchers [4][5][6][7], including Chapter 12 of the first volume and Chapters 5, 6 and 9 of this book, and are thus outside the scope of this chapter focused on selected aspects of mixed conducting membranes for gas separation.Solid State Electrochemistry II: Electrodes, Interfaces and Ceramic Membranes. Edited by Vladislav V. Kharton.

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Experimental and modeling study of oxygen permeation modes for asymmetric mixed-conducting membranes

Cited by 24 publications

References 24 publications

Current developments of mixed conducting membranes on porous substrates

Current developments of mixed conducting membranes on porous substrates

Microchannel structure of ceramic membranes for oxygen separation

Interfacial Phenomena in Mixed Conducting Membranes: Surface Oxygen Exchange‐ and Microstructure‐Related Factors

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