Hollow fibre perovskite membranes for oxygen separation

Schiestel, Thomas; Kilgus, Mirjam; Peter, Sebastian C.; Caspary, Karl Josef; Wang, Haihui; Caro, Jürgen

doi:10.1016/j.memsci.2005.03.035

Cited by 210 publications

(108 citation statements)

References 8 publications

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“…Therefore, the development of new materials with high oxygen permeability and phase stability has been the major effort of most researchers in the related field (Bouwmeester, et al, 1992;Diethelm et al, 2003;Qi and Lin, 2003;Diethelm and Van Herle, 2004;Deng et al, 2004;Kim et al, 2005;Schiestel et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Effects of scandium doping concentration on the properties of strontium cobalt oxide membranes

Zeng

Ran

Shao

et al. 2009

Braz. J. Chem. Eng.

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-Perovskite-type mixed conducting oxides of SrCo 1-y Sc y O 3-δ (y=0.02-0.7) were synthesized by a combined EDTA-citrate complexing method. Different scandium doping concentrations in SrCo 1-y Sc y O 3-δ have significant effects on the phase structure, electrical conductivity, surface properties and oxygen permeation behaviour of the resultant membranes. SrCoO 3-δ without scandium incorporation displayed a 2H BaNiO 3 -type structure with almost zero oxygen flux at high temperatures. Small amounts of Sc 2 O 3 doping (y<0.1) efficiently stabilized the oxide in a cubic perovskite structure, leading to a sharp increase in the permeation flux, with a maximum value of 3.1ml.cm -2 .min -1 achieved at 900 o C for SrCo 0.95 Sc 0.05 O 3-δ and SrCo 0.9 Sc 0.1 O 3-δ membranes. The permeation process could be rate-limited by either the oxygen bulk diffusion, oxygen surface exchange, or a combination of both depending on the scandium doping level. Further increases of the Sc 3+ doping concentration (y>0.1) were found to lower the membrane oxygen fluxes, with y≥0.4 doped SrCo 1-y Sc y O 3-δ ceramics no longer showing any oxygen permeation.

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Section: Introductionmentioning

confidence: 99%

Effects of scandium doping concentration on the properties of strontium cobalt oxide membranes

Zeng

Ran

Shao

et al. 2009

Braz. J. Chem. Eng.

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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%

“…Hollow fiber membranes can be fabricated using simple processing steps, without the use of porous substrate. Perovskite capillaries with an outer diameter from 0.5 to 3 mm and wall thicknesses from 50 to 500 µm have been manufactured 12,13 . However, material measurements.…”

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%

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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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“…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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Hollow fibre perovskite membranes for oxygen separation

Cited by 210 publications

References 8 publications

Effects of scandium doping concentration on the properties of strontium cobalt oxide membranes

Effects of scandium doping concentration on the properties of strontium cobalt oxide membranes

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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