Oxygen selective ceramic hollow fiber membranes

Liu, Shaomin; Gavalas, George R.

doi:10.1016/j.memsci.2004.09.028

Cited by 185 publications

(104 citation statements)

References 9 publications

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“…To produce the oxygen partial pressure profile, we used the experimentally measured oxygen permeation rates by Xu and Thomson [31]. Using the La0.6Sr0.4Co0.2Fe0.8O3-d membrane, they generated 126 data points in a typical disc-type stagnation-flow permeation facility that were used to evaluate the six parameters (preexponential factors and activation energies) required in expression (12). Note that they used the bulk stream oxygen partial pressures, P O 2 , feed,(b) and P O 2 , sweep,(b) , measured at the feed air inlet and a sweep gas outlet, respectively.…”

Section: Estimation Of Local Oxygen Partial Pressurementioning

confidence: 99%

“…Since the 1980s when mixed-conducting ceramic membranes were introduced [3][4][5][6], extensive research has been performed to improve oxygen permeation rates [7][8][9][10][11][12][13]. In the course of these experimental activities, a reactive gas such as methane has been employed on the permeate side to increase the chemical potential gradient by consuming the permeated oxygen and to maintain the membrane temperature, and thus to enhance oxygen permeation rates.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

Hong

Kirchen

Ghoniem

2012

Journal of Membrane Science

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Ion transport membrane (ITM) based reactors have been suggested as a novel technology for several applications including fuel reforming and oxy-fuel combustion, which integrates air separation and fuel conversion while reducing complexity and the associated energy penalty. To utilize this technology more effectively, it is necessary to develop a better understanding of the fundamental processes of oxygen transport and fuel conversion in the immediate vicinity of the membrane. In this paper, a numerical model that spatially resolves the gas flow, transport and reactions is presented. The model incorporates detailed gas phase chemistry and transport. The model is used to express the oxygen permeation flux in terms of the oxygen concentrations at the membrane surface given data on the bulk concentration, which is necessary for cases when mass transfer limitations on the permeate side are important and for reactive flow modeling. The simulation results show the dependence of oxygen transport and fuel conversion on the geometry and flow parameters including the membrane temperature, feed and sweep gas flow, oxygen concentration in the feed and fuel concentration in the sweep gas.

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Section: Estimation Of Local Oxygen Partial Pressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

Hong

Kirchen

Ghoniem

2012

Journal of Membrane Science

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“…In addition to its ability to support very thin walled membranes, the hollow fiber geometry also maximizes the surface area per unit volume. Recent developments show large improvements in oxygen permeation rates in hollow fibers 1,12,13,15,17,18 compared with flat, self-supported membranes. Similar results might be compared with some of the best results in the literature on flat supported membranes.…”

Section: Supported Miec Membranesmentioning

confidence: 99%

“…The perovskite structure exhibits good ionic and electronic conductivity leading to attractive oxygen flux 7 . In the last decade, intensive research has been dedicated to the preparation and characterization of MIEC membranes [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] . However, a few reports can be found regarding to the preparation of crack-free membranes (with thicknesses less than 25 µm) for planar or tubular geometries.…”

Section: Introductionmentioning

confidence: 99%

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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“…In order to develop a membrane exhibiting high oxygen flux, better mechanical strength and good phase stability in a reducing atmosphere, extensive studies have been conducted in more than 20 laboratories worldwide (Teraoka et al, 1985;Teraoka et al, 1988;Diethelm et al, 2003Yan et al, 2010Kim et al, 1997;Ishihara et al, 2000;Schiestel et al, 2005;Liu et al, 2005;Li et al, 2006;Tan et al, 2005). Among the MIECs, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF) is considered to be one of the most promising materials because its membranes show high oxygen permeation fluxes and excellent cathode performance for SOFCs (Shao and Haile, 2004;Shao et al, 2000;McIntosh et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

EFFECTS OF SINTERING TEMPERATURE ON THE PERFORMANCE OF SrSc0.1Co0.9O3-δOXYGEN SEMIPERMEABLE MEMBRANE

Zeng

Wang

Falkenstein‐Smith

et al. 2015

Braz. J. Chem. Eng.

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-Our study investigates the influence of sintering temperature on the microstructure (grain size distribution, grain boundary length), electrical conductivity, and oxygen permeation properties of permeation membranes. For this purpose, SrSc 0.1 Co 0.9 O 3-δ samples with different microstructures were prepared by varying the sintering temperature from 1100 to 1250 °C. The average grain sizes were gradually increased, thus the grain boundary lengths decreased with increased sintering temperatures. The influence of the ceramic microstructure on total electrical conductivity was found to be negligible. The oxygen transport properties of the samples were characterized by permeation measurements as a function of temperature in an air/helium oxygen partial pressure gradient. The decrease of the sintering temperature, meaning a decrease of grain size and thus the increase of grain boundary length, leads to an enhanced oxygen permeation flux and a reduced activation energy. This implies that oxygen exchange and transport in the SrSc 0.1 Co 0.9 O 3-δ membranes occur more rapidly along grain boundaries than in the grain bulk.

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Oxygen selective ceramic hollow fiber membranes

Cited by 185 publications

References 9 publications

Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

Numerical simulation of ion transport membrane reactors: Oxygen permeation and transport and fuel conversion

Current developments of mixed conducting membranes on porous substrates

EFFECTS OF SINTERING TEMPERATURE ON THE PERFORMANCE OF SrSc0.1Co0.9O3-δOXYGEN SEMIPERMEABLE MEMBRANE

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