Oxygen permeability and CO2-tolerance of Sr(Co0.8Fe0.2)0.8Ti0.2O3−δ hollow fiber membrane

Li, Jun-lei; Zeng, Qing; Liu, Tong; Chen, Chusheng

doi:10.1016/j.seppur.2010.11.022

Cited by 11 publications

(3 citation statements)

References 16 publications

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“…Oxygen permeation flux through perovskite membranes is mainly affected by perovskite composition, − powder preparation route, and also membrane shaping and sintering conditions, − including sintering temperature and dwell time, heating and cooling rates, and even the furnace atmosphere . Not only do operating conditions such as temperature, upstream oxygen concentration, feed and permeate side pressures, feed and sweep gases and their flow rates, and feed impurities even at very low concentrations influence oxygen permeability of the membrane, − but features such as thickness and age also affect the oxygen permeation rate through the membrane. − …”

Section: Introductionmentioning

confidence: 99%

Preparation and Oxygen Permeation of La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Asadi

Behrouzifar

Iravaninia

et al. 2012

Ind. Eng. Chem. Res.

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La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ nanopowder, synthesized via an autocombustion technique, was pressed into disk-shaped membranes. Results of permeation experiments revealed that oxygen permeation flux increases as temperature, feed side oxygen partial pressure, and feed and sweep gas flow rates increase, while it decreases with membrane thickness and permeate side oxygen partial pressure. A Nernst−Planck based mathematical model, including surface exchange kinetics and bulk diffusion, was developed to predict oxygen permeation flux. Considering nonelementary surface reactions and introducing system hydrodynamics into the model resulted in an excellent agreement (RMSD = 0.0344, AAD = 0.0274 and R 2 = 0.9960) between predicted and measured fluxes. Feed side surface exchange reactions, bulk diffusion, and permeate side surface exchange reaction resistances are in the range of R ex ′ = 7 × 10 3 to 9 × 10 6 , R diff = 1 × 10 5 to 2 × 10 7 , and R ex ″ = 1 × 10 4 to 2 × 10 7 (s/m), respectively. The permeation rate-limiting step was determined using the membrane dimensionless characteristic thickness.

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Section: Introductionmentioning

confidence: 99%

Preparation and Oxygen Permeation of La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Asadi

Behrouzifar

Iravaninia

et al. 2012

Ind. Eng. Chem. Res.

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“…However, significant research efforts have recently been focused on perovskite hollow-fiber membranes. The preparation, microstructure, oxygen permeability, catalytic performance, and even permeation modeling of perovskite hollow-fiber membrane have been widely investigated. − All of these hollow-fiber studies have focused on perovskite oxides such as Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ (BSCF), La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ , BaCo x Fe y Zr z O 3−δ ( x + y + z = 1), SrCe 0.95 Yb 0.05 O 3−δ , , SrCo 0.9 Nb 0.1 O 3−δ , SrCo 0.9 Sc 0.1 O 3−δ , and Sr(Co 0.8 Fe 0.2 ) 0.8 Ti 0.2 O 3−δ . No hollow-fiber membranes based on oxides with a K 2 NiF 4 -type structure have been prepared by a spinning/sintering process.…”

Section: Introductionmentioning

confidence: 99%

Oxygen Permeation through U-Shaped K₂NiF₄-Type Oxide Hollow-Fiber Membranes

Wei

Tang

Zhou

et al. 2011

Ind. Eng. Chem. Res.

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The first oxygen permeation data for a dense hollow-fiber membrane based on a K 2 NiF 4 -type oxide are reported. The U-shaped (Pr 0.9 La 0.1 ) 2 (Ni 0.74 Cu 0.21 Ga 0.05 )O 4+δ (PLNCG) hollow-fiber membranes were prepared by a phase-inversion spinning process. The dependences of the oxygen permeation on the feed air flow rate, sweep helium flow rate, oxygen partial pressure on the shell side, and operating temperature were experimentally investigated. The effects of the bulk diffusion and the surface exchange on the oxygen permeation flux through the U-shaped PLNCG hollow-fiber membranes are also discussed. During around 320 h of operation, a steady oxygen permeation flux of 1.0 mL/(min 3 cm 2 ) was obtained at 975 °C under conditions of an air feed flow rate of 180 mL/min and a helium sweep flow rate of 55 mL/min. XRD and SEM analyses of the spent hollow-fiber membrane showed the good stability of the U-shaped PLNCG hollow-fiber membranes.

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“…disc, hollow fibers and capillaries) [9][10][11][12][13][14][15], the material itself by doping BSCF with cations (i.e. Bi, Zn, Y, W and Sr/Ti) [16][17][18][19][20][21], and processes associated with membrane thickness [22] and sintering conditions [23,24].…”

Section: Introductionmentioning

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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Oxygen permeability and CO2-tolerance of Sr(Co0.8Fe0.2)0.8Ti0.2O3−δ hollow fiber membrane

Cited by 11 publications

References 16 publications

Preparation and Oxygen Permeation of La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Preparation and Oxygen Permeation of La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Oxygen Permeation through U-Shaped K₂NiF₄-Type Oxide Hollow-Fiber Membranes

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

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Oxygen permeability and CO2-tolerance of Sr(Co0.8Fe0.2)0.8Ti0.2O3−δ hollow fiber membrane

Cited by 11 publications

References 16 publications

Preparation and Oxygen Permeation of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Preparation and Oxygen Permeation of La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Oxygen Permeation through U-Shaped K2NiF4-Type Oxide Hollow-Fiber Membranes

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

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Preparation and Oxygen Permeation of La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Preparation and Oxygen Permeation of La_0.6Sr_0.4Co_0.2Fe_0.8O_3−δ (LSCF) Perovskite-Type Membranes: Experimental Study and Mathematical Modeling

Oxygen Permeation through U-Shaped K₂NiF₄-Type Oxide Hollow-Fiber Membranes