High CO2 tolerance oxygen permeation membranes BaFe0.95-Ca0.05Ti O3-

Li, Kui; Zhao, Hailei; Lu, Yao; Ma, Yanhui; Du, Zhenmin; Zhang, Zijia

doi:10.1016/j.memsci.2018.01.007

Cited by 45 publications

(19 citation statements)

References 46 publications

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“…10b, c, e, f. It can be seen that the samples are exposed no matter in air or 60vol.% CO2/40vol.% N2 atmosphere, the unit-cell parameters for PCFO could be divided into two segments: the low (25 -600 °C ) and high temperature (800 -1000 °C) parts. The slope of the high temperature line is more inclined than that of the low temperature line, which could be ascribed to the formation of more oxygen vacancies apart from lattice expansion in the elevated temperature [45]. As for the two segments of fluorite phase CPO in Fig.…”

Section: Stability Studymentioning

confidence: 87%

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High-flux dual-phase percolation membrane for oxygen separation

Wang

Shi

Xie

et al. 2019

Journal of the European Ceramic Society

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A series of composites based on (100-x)wt.%Ce0.9Pr0. 40 and 50) doped with the cheap and abundant alkaline earth metal Ca 2+ at the A-site has been successfully designed and fabricated. The crystal structure, oxygen permeability, phase and CO2 stability were evaluated. Thepossesses the highest oxygen permeability among three studied composites. At 1000 o C, the oxygen permeation fluxes through the 0.3 mm-thickness 60CPO-40PCFO membranes after porous La0.6Sr0.4CoO3-δ each to 1.00 mL cm -2 min -1 and 0.62 mL cm -2 min -1 under air/He and air/CO2 gradients, respectively. In situ XRD results demonstrated that the 60CPO-40PCFO sample displayed a perfect structural stability in air as well as CO2-containing atmosphere. Thus, low-cost, Co-free and Sr-free 60CPO-40PCFO has high CO2 stability and is economical and environmental friendly since the expensive and volatile element Co was replaced by Fe and Sr was waived since it easily forms carbonates.

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Section: Stability Studymentioning

confidence: 87%

“…The effluent content was detected by gas chromatography (GC, zhonghuida-A60, Dalian,China), the oxygen permeation rate was calculated according to eq. 1:[44][45][46]…”

mentioning

confidence: 99%

High-flux dual-phase percolation membrane for oxygen separation

Wang

Shi

Xie

et al. 2019

Journal of the European Ceramic Society

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“…A sealant paste was applied to connect the membrane disk to the thick quartz tube and expose the sweeping side for permeation to an active area of ~0.45 cm 2 . Air was flushed to an oxygen‐rich side from a gas cylinders with a constant flux of 400 mL min −1 , while helium at a flux of 100 mL min −1 was added for a partial pressure gradient throughout the membrane, serving as a conveyor gas to carry the oxygen into a permeated GC Agilent fitted with a column of the 5 Å capillary molecules and thermally conductive sensors for quantitative oxygen concentration …”

Section: Methodsmentioning

confidence: 99%

“…The introduction of a fixed valent metal into B‐site stabilizing the cobalt ions is a good approach to improve the membrane stability while preserving the ion conductivity. It was reported that a series of Ta 3+ , Nb 5+ , Sc 3+ and Ti 3+ metals with fixed valence had been incorporated into B site of cobalt‐based perovskite to pursuit improved stability under lower oxygen partial pressure environment . Unfortunately, it still lacks some details regarding CO 2 resistance and the state of cobalt ions with B site stabilizing cations in the open literature.…”

Section: Introductionmentioning

confidence: 99%

Lead and tungsten double stabilizing cobalt‐based perovskite oxygen permeation membranes for clean energy delivery

et al. 2020

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Summary In this work, a double site stabilizing cobalt‐based perovskite strategy is proposed to enable the feasibility of the oxygen separation membrane. In order to achieve the excellent material stability, the inherently robust lead and tungsten were selected to stabilize cobalt‐containing perovskite, respectively. PbxSr1−xCo1−yWyO3−δ (PSCW, 0 ≤ x, y ≤ 1) oxide was prepared by wet chemical process. The oxygen permeation test indicated that Pb and W double site stabilizing strategy is enabling the perovskite membranes to work with decent JO2 over ~2.0 mL cm−2 min−1 observed at 850°C. In addition, the robustness of the PSCW membrane was confirmed by long‐term test against erosive gases (CO2 and H2O) as the oxygen fluxes of Pb0.5Sr0.5Co0.9W0.1O3−δ (PSCW5‐5‐9‐1) membranes reverted back to the initial values of 1.91 mL cm−2 min−1 as these erosive gases were turned off. This result suggests that the double site Pb and W stabilizing technology may open a way to advance the viability of the ceramic membrane technology.

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“…The reason why choosing Ca-based compounds is as follows: (i) there is abundant Ca element on the earth thereby they are low-cost; (ii) the formation of CaCO3 is more difficult than those of BaCO3 and SrCO3 under the similar conditions due to the ionic radii of Ca 2+ is much smaller than those of Ba 2+ and Sr 2+ [27]. Previous reports have documented that Ca-doping single-phase OTMs exhibits higher CO2 stability and comparable oxygen permeability in comparison with the Ba/Sr-containing single-phase OTMs, whereas there are rare Ca-containing dual-phase membranes reported [17,[27][28][29][30][31]. Herein, we report a series of calcium-containing composites with the formula 60wt.%Ce0.9Ln0.1O2-δ-40wt.% Ln0.6Ca0.4FeO3-δ (Ln = La, Pr, Nd, Sm; denoted as CLO-LCFO, CPO-PCFO, CNO-NCFO and CSO-SCFO).…”

Section: Introductionmentioning

confidence: 97%

Influence of Ln elements (Ln = La, Pr, Nd, Sm) on the structure and oxygen permeability of Ca-containing dual-phase membranes

Wang

Shi

Boubeche

et al. 2020

Separation and Purification Technology

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Developing good performance and low-cost oxygen permeable membranes for CO2 capture based on the oxy-fuel concept is greatly desirable but challenging. Despite tremendous efforts in exploring new CO2-stable dual-phase membranes, its presence is however still far from meeting the industrial requirements. Here we report a series of new Ca-containing CO2-resistant oxygen transporting membranes with composition 60wt.%Ce0.9Ln0.1O2-δ-40wt.%Ln0.6Ca0.4FeO3-δ (CLnO-LnCFO; Ln = La, Pr, Nd, Sm) synthesized via a Pechini one-pot method. Our results indicate all investigated compounds are composed of perovskite and fluorite phases, while the perovskite phases in the CNO-NCFO and CSO-SCFO membranes after sintering generates Ca-rich and Ca-less two kinds of grains with different morphologies, where the Ca-less small perovskite grains block the transport of oxygen ions and eventually result in poor oxygen permeability. Among our investigated CLnO-LnCFO membranes, CPO-PCFO exhibits the highest oxygen permeability and excellent CO2 stability, which were mainly associated with the improvement in crystal symmetry, nonnegligible electronic conductivity of fluorite phase and the enhancement in electronic conductivity of perovskite. Our results establish Ca-containing oxides as candidate material platforms for membrane engineering devices that combine CO2 capture and oxygen separation.

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High CO2 tolerance oxygen permeation membranes BaFe0.95-Ca0.05Ti O3-

Cited by 45 publications

References 46 publications

High-flux dual-phase percolation membrane for oxygen separation

High-flux dual-phase percolation membrane for oxygen separation

Lead and tungsten double stabilizing cobalt‐based perovskite oxygen permeation membranes for clean energy delivery

Influence of Ln elements (Ln = La, Pr, Nd, Sm) on the structure and oxygen permeability of Ca-containing dual-phase membranes

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