Corrosion of Ba1−xSrxCo1−yFeyO3−δ and La0.3Ba0.7Co0.2Fe0.8O3−δ materials for oxygen separating membranes under Oxycoal conditions

Waindich, Arleta; Möbius, A.; Müller, Michael

doi:10.1016/j.memsci.2009.03.041

Cited by 84 publications

(48 citation statements)

References 20 publications

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“…However, all these high performance membranes contain Ba 2+ and/or Sr 2+ in the A-site of the perovskite structure and are unstable in a CO 2 environment [21][22][23][24], as a result these membranes are unsuitable to be combined with the oxy-fuel route for CO 2 capture. Perovskite-type MIEC membranes without Ba 2+ and Sr 2+ doped in the A-site usually show low oxygen permeation flux.…”

Section: Introductionmentioning

confidence: 99%

Oxygen permeation through Ca-contained dual-phase membranes for oxyfuel CO2 capture

Liu

Zhu

et al. 2013

Separation and Purification Technology

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Section: Introductionmentioning

confidence: 99%

Oxygen permeation through Ca-contained dual-phase membranes for oxyfuel CO2 capture

Liu

Zhu

et al. 2013

Separation and Purification Technology

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“…Perovskite BSCF is easily poisoned by high purity CO 2 /H 2 O in the sweep gas atmosphere. When the sweep gas was switched back to pure helium, the oxygen flux of BSCF could not be recovered to its original value due to the carbonate formation from the reactions between the alkaline earth metals like Ba/Sr and CO 2 at high temperatures, which blocks the O 2 surface exchange reactions [58,59]. This striking comparison strongly mirrors that the currently developed PCGO-CFO dual-phase membrane has an excellent tolerance for CO 2 gas.…”

Section: Co 2 Resistance Of Dual-phase Hollow Fiber Membranesmentioning

confidence: 81%

A novel CO2-resistant ceramic dual-phase hollow fiber membrane for oxygen separation

Meng

Liu

et al. 2017

Journal of Membrane Science

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Robust oxygen permeable ceramic membranes have potential applications in clean energy industries like oxyfuel power plants and green chemical synthesis like syngas production combining the separation and reaction in one unit. The well-known and 1 These authors contributed equally to this work and should be considered co-first authors without any noticeable performance degradation or membrane deterioration. By contrast, the flux rate of pure perovskite membrane had been sharply dropped down by 80% albeit operated for only 8 hours.

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“…2 These patterns confirm that the rich carbon porogenic agent has not affected the crystal structure in the sintered porous substrate. This is an important point as the combustion of activated carbon embedded in the perovskite matrix during calcination in air at high temperatures generated CO 2 , which has the propensity to form carbonates [43][44][45], thus affecting the BSCF structure. This is not the case in this work as no secondary phases containing metal oxides were observed in the XRD patterns.…”

Section: Resultsmentioning

confidence: 99%

Influence of porous structures on O 2 flux of BSCF asymmetric membranes

Rachadel

Motuzas²,

Machado

et al. 2017

Separation and Purification Technology

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. containing either a thin PL porous layer (40 µm), and/or a DS dense membrane (500 µm), and/or a PS porous substrate (500 µm). Activated carbon (i.e. porogen agent) at 20 wt% was mixed with BSCF to form porous structures. The membranes were processed by dry pressing followed by sintering at high temperatures. The best oxygen fluxes of 2.86 mL min -1 cm -2 at 850 °C were achieved with the PL-DS membrane configuration, which delivered a 42% higher oxygen flux than the DS dense membrane. This improvement was attributed to the larger contact area with the air feed conferred by the thin PL porous layer. However, the PL-DS-PS configuration resulted in a 21% decrease of oxygen flux as compared to the PL-DS membrane which strongly suggested that the PS porous substrate contributed extra resistance to the transport of oxygen. CT scan analysis of the PS porous substrate revealed that the pore volume was concentrated in the center of the PS porous substrate, with a reduced pore volume contribution closer to the external surface. 3D 2 analysis revealed the connectivity of the regions closer to the external surface was over three orders of magnitude lower than that of the center of the PS porous substrate, thus creating a bottle-neck.Although all pores were large (> 1 µm), the expected resistance should be very low, however, the bottle-neck region closer to the external surface provided additional resistance for the transport of oxygen from the membrane interface to the permeate side.

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Corrosion of Ba1−xSrxCo1−yFeyO3−δ and La0.3Ba0.7Co0.2Fe0.8O3−δ materials for oxygen separating membranes under Oxycoal conditions

Cited by 84 publications

References 20 publications

Oxygen permeation through Ca-contained dual-phase membranes for oxyfuel CO2 capture

Oxygen permeation through Ca-contained dual-phase membranes for oxyfuel CO2 capture

A novel CO2-resistant ceramic dual-phase hollow fiber membrane for oxygen separation

Influence of porous structures on O 2 flux of BSCF asymmetric membranes

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