Oxygen permeation behavior of La0.6Sr0.4Co0.8Fe0.2O3 hollow fibre membranes with highly concentrated CO2 exposure

Tan, Xiaoyao; Liu, Nan; Meng, Bo; Sunarso, Jaka; Zhang, Kun; Liu, Shaomin

doi:10.1016/j.memsci.2011.10.032

Cited by 128 publications

(98 citation statements)

References 31 publications

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“…Thus, the primary approach used to improve the CO 2 stability of the perovskite-type materials is to modify the composition by doping other metals into the 42 can be obtained by doping a less basic alkaline-earth metal or non-alkaline earth metals (such as La, Ca). [40][41][42][43] In our study the 40NSFO-60CNO membrane has good reversibility of the oxygen permeation uxes and good chemical stability in a CO 2 atmosphere.…”

Section: Characterization Of the 40nsfo-60cno Dual Phase Materialsmentioning

confidence: 53%

A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂capture

et al. 2014

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We report a novel CO 2 -stable reduction-tolerant dual-phase oxygen transport membrane 40 wt% Nd 0.6 Sr 0.4 FeO 3Àd -60 wt% Ce 0.9 Nd 0.1 O 2Àd (40NSFO-60CNO), which was successfully developed by a facile one-pot EDTA-citric sol-gel method. The microstructure of the crystalline 40NSFO-60CNO phase was investigated by combined in situ X-ray diffraction (XRD), scanning electron microscopy (SEM), back scattered SEM (BSEM), and energy dispersive X-ray spectroscopy (EDXS) analyses. Oxygen permeation and long-time stability under CO 2 and CH 4 atmospheres were investigated. A stable oxygen flux of 0.21 cm 3 min À1 cm À2 at 950 C with undiluted CO 2 as sweep gas is found which is increased to 0.48 cm 3 min À1 cm À2 if the air side is coated with a porous La 0.6 Sr 0.4 CoO 3Àd (LSC) layer. All the experimental results demonstrate that the 40NSFO-60CNO not only shows good reversibility of the oxygen permeation fluxes upon temperature cycling, but also good phase stability in a CO 2 atmosphere and under the harsh conditions of partial oxidation of methane to synthesis gas up to 950 C.

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Section: Characterization Of the 40nsfo-60cno Dual Phase Materialsmentioning

confidence: 53%

A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂capture

et al. 2014

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“…The latter may be attributed to the adsorption of CO 2 molecules at the surface, thereby blocking the surface exchange reaction. 29,34 Compared to (PL) 2.0 NCG, slightly lower activation energies are found for A-site decient (PL) 1.9 NCG. Apparent activation energies in the temperature range of 800-975 C, using He as sweep gas, are 25 and 27 kJ mol À1 for (PL) 1.9 NCG and (PL) 2.0 NCG, respectively.…”

Section: Oxygen Uxmentioning

confidence: 89%

A new CO₂-resistant Ruddlesden–Popper oxide with superior oxygen transport: A-site deficient (Pr_0.9La_0.1)_1.9(Ni_0.74Cu_0.21Ga_0.05)O_4+δ

et al. 2015

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A-site deficient (Pr 0.9 La 0.1 ) 1.9 Ni 0.74 Cu 0.21 Ga 0.05 O 4+d ((PL) 1.9 NCG), with the K 2 NiF 4 structure, is found to exhibit higher oxygen transport rates compared with its cation-stoichiometric parent phase. A stable oxygen permeation flux of 4.6 Â 10 À7 mol cm À2 s À1 at 900 C at a membrane thickness of 0.6 mm is measured, using either helium or pure CO 2 as sweep gas at a flow rate of 30 mL min À1 . The oxygen flux is more than two times higher than that observed through A-site stoichiometric (PL) 2.0 NCG membranes operated under similar conditions. The high oxygen transport rates found for (PL) 1.9 NCG are attributed to highly mobile oxygen vacancies, compensating A-site deficiency. The high stability against carbonation gives (PL) 1.9 NCG potential for use, e.g., as a membrane in oxy-fuel combustion processes with CO 2 capture.

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“…Electrode materials should exhibit important mixed ionic and electronic conductivity (MIEC) as well as show high efficiency and high stability vs. protons and/or oxygen/hydrogen. Furthermore, they should be also stable vs. other gas components such as CO 2 , NO x which could reduce the stability and the efficiency of the MIEC-materials as well as accelerate its ageing through chemical/structural transitions [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Chemical and structural stability of La0.6Sr0.4Co0.2Fe0.8O3− ceramic vs. medium/high water vapor pressure

Upasen

Batocchi

Mauvy

et al. 2015

Ceramics International

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During the last decades, perovskite-type oxides have received large attention as potential electrolytes and electrodes for Solid Oxide Fuel Cells (SOFC), including Proton Ceramic Fuel Cells (PCFC), gas separation membranes and High Temperature Steam Electrolysers (HTSE). A thermal treatment in an autoclave, at a temperature close to an operating temperature, was used to measure the chemical stability of La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3 À δ (LSCF6428) ceramic under medium and high water pressure ( $20 and 40 bar). This mixed ionicÀ electronic conductor (MIEC) exhibits interesting properties as cathode of fuel cell materials. The reactivity rate of the investigated LSCF6428 sample under the protonation process conditions (several weeks at 550 1C using CO 2 -free and CO 2 -saturated water) was studied in order to evaluate a potential use of this compound. Bulk and surface structural/chemical changes were characterized by optical microscopy, TGA, dilatometry, Raman and ATR-FTIR spectroscopy. The results revealed only minor surface modifications in the case of ceramic treated under medium vapor pressure (20 bar) using CO 2 -free water. On the contrary, under higher pressure (40 bar) and CO 2 -saturated water several second phases were detected, namely strontianite, cobalt oxides and hematite. The chemical/structural stability of LSCF6428 is compared with previously investigated RareEarth nickelate ceramics: La 2 NiO 4 þ δ / Pr 2 NiO 4 þ δ / Nd 2 NiO 4 þ δ .

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Oxygen permeation behavior of La0.6Sr0.4Co0.8Fe0.2O3 hollow fibre membranes with highly concentrated CO2 exposure

Cited by 128 publications

References 31 publications

A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂capture

A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂capture

A new CO₂-resistant Ruddlesden–Popper oxide with superior oxygen transport: A-site deficient (Pr_0.9La_0.1)_1.9(Ni_0.74Cu_0.21Ga_0.05)O_4+δ

Chemical and structural stability of La0.6Sr0.4Co0.2Fe0.8O3− ceramic vs. medium/high water vapor pressure

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Oxygen permeation behavior of La0.6Sr0.4Co0.8Fe0.2O3 hollow fibre membranes with highly concentrated CO2 exposure

Cited by 128 publications

References 31 publications

A CO2-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO2capture

A CO2-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO2capture

A new CO2-resistant Ruddlesden–Popper oxide with superior oxygen transport: A-site deficient (Pr0.9La0.1)1.9(Ni0.74Cu0.21Ga0.05)O4+δ

Chemical and structural stability of La0.6Sr0.4Co0.2Fe0.8O3− ceramic vs. medium/high water vapor pressure

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Product

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A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂capture

A CO₂-stable reduction-tolerant Nd-containing dual phase membrane for oxyfuel CO₂capture

A new CO₂-resistant Ruddlesden–Popper oxide with superior oxygen transport: A-site deficient (Pr_0.9La_0.1)_1.9(Ni_0.74Cu_0.21Ga_0.05)O_4+δ