SrCo0.8Fe0.2O3−δ sorbent for high-temperature production of oxygen-enriched carbon dioxide stream

Rui, Zebao; Ding, Jingjing; Li, Yongdan; Lin, Jerry Y S

doi:10.1016/j.fuel.2009.10.024

Cited by 38 publications

(24 citation statements)

References 21 publications

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“…However, later studies revealed that the SCF phase was not stable below 800 • C at oxygen partial pressures lower than about 0.1 atm due to oxygen vacancy ordering [5,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

Salehi

Clemens

Pfaff

et al. 2011

Journal of Membrane Science

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Oxygen permeability measurements of Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−ı (BSCF) disk shaped membranes fabricated by thermoplastic processing and sintered at different temperatures (1000-1100• C), showed no influence of the grain size on the oxygen permeation fluxes. To further investigations, Electron Backscattered Diffraction (EBSD) and Conductive mode (CM) microscopy methods were used for texture analysis and observation of the local electrical behavior in the BSCF membranes, respectively. EBSD results revealed that the grain size of the membranes increased with increasing the sintering temperature from an average of 3.32 m at 1000• C to 18.25 m at 1100 • C. Also, it was seen that there was no textural difference between the different samples. CM analysis demonstrated that the electronic conductivity of the grains and grain boundaries was similar in the membrane sintered at 1000• C. Finally, the stability of the membrane under the operation conditions was tested, and it was found that the permeation flux was nearly constant at 900• C after an operation time of more than 50 h, whereas oxygen permeation flux declined after a relative short time at 825• C.

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“…However, later studies revealed that the SCF phase was not stable below 800 • C at oxygen partial pressures lower than about 0.1 atm due to oxygen vacancy ordering [5,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

Salehi

Clemens

Pfaff

et al. 2011

Journal of Membrane Science

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“…15,16 However, only a few reports have evaluated the use of perovskite as oxygen carrier for oxygen production. 17 To the best of our knowledge, the effects of micro-structure and Co doping of SrCo 1-x Fe x O 3-δ on oxygen production performance remain unknown. Moreover, the development of SrCo 1-x Fe x O 3-δ powders needs further research.…”

Section: -11mentioning

confidence: 99%

“…This method could be used to synthesize homogeneous, high-purity, and crystalline oxide powders. Figure 10 shows the XRD patterns of SrCo 0.8 Fe 0.2 O 3-δ synthesized via the liquid citrate method in the reference 17 and the EDTA-citrate complex gel (EDTA) method. XRD characterizations show that pure perovskite structures are formed for powders synthesized via both methods.…”

Section: 28mentioning

confidence: 99%

Characteristics of SrCo_1-xFe_xO_3-_δPerovskite Powders with Improved O₂/CO₂Production Performance for Oxyfuel Combustion

Shen¹,

Zheng²,

Luo³

et al. 2014

Bulletin of the Korean Chemical Society

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Perovskite-type oxides are promising oxygen carriers in producing oxygen-enriched CO 2 gas stream for oxyfuel combustion. In this study, a new series of SrCo 1-x Fe x O 3-δ (x = 0.2, 0.4, 0.6, 0.8) was prepared and used to produce O 2 /CO 2 mixture gas. The phase, crystal structure, and morphological properties of SrCo 1-x Fe x O 3-δ were investigated through X-ray diffraction, specific surface area measurements, and environmental scanning electron microscopy. The oxygen desorption performance of SrCo 1-x Fe x O 3-δ was studied in a fixed-bed reactor system. Results showed that the different x values of SrCo 1-x Fe x O 3-δ have no obvious effects on crystalline structure. However, the oxygen desorption performance of SrCo 1-x Fe x O 3-δ is improved by Co doping. Moreover, SrCo 0.8 Fe 0.2 O 3-δ synthesized via a new EDTA method has a larger BET surface area (40.396 m 2 /g), smaller particle size (48.3 nm), and better oxygen production performance compared with that synthesized through a liquid citrate method.

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“…De la Figura 3 se puede observar el tamaño de las partículas no es uniforme, con una muestra compuesta de partículas o grupos de particulas, teniendo en cuenta también la presencia de poros, como se destaca en la Figura 3. En cooperación con los resultados presentados por Rui et al, 2010.…”

Section: Microscopía Electrónica De Barrido (Mev)unclassified

Síntesis y Refinado por el Método Rietveld de la fase perovsquita obtenida a partir del Método de Co-precipitación vía Oxalato

et al. 2011

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ResumenMaterial cerámico del tipo perovisquita SrCo 0,8 Fe 0,2 O 3-δ fue sintetizado usando el método de coprecipitación en medio oxalato. Durante los análisis térmico-gravimétrico y térmico-diferencial (TG/DTA) se verificó que independientemente de la naturaleza del reactivo o agente precipitante adoptado en la síntesis del precursor, la curva termogravimétrica presenta tres etapas, con pérdida de masa total de aproximadamente el 40 %. Mediante difracción de rayos X se verificó que el tamaño medio del cristalito fue de aproximadamente 77,22 nm utilizando nitrato de Hierro III, casi un 83 % superior al obtenido usando oxalato de Hierro III (42,23 nm). Sin embargo, la variación del agente precipitante no afectó prácticamente al tamaño mediano de cristalino (42,95 nm y 42,23 nm). El material presenta isotermas de tipo II, con una superficie específica de aproximadamente 4,41m 2 g -1 . Palabras clave: perovsquita, método co-precipitación, oxalato, refinamiento Rietveld Synthesis and Refining by Rietveld Method of the perovskite phase obtained using Oxalate Coprecipitation Method AbstractPowders of perovskite SrCo 0.8 Fe 0.2 O 3-δ were synthesized using oxalate co-precipitation method. According to the thermal gravimetry and differential thermal analysis (TG/DTA), total mass loss was 40 % corresponding to three different steps and the precipitant agent as well the starting chemical elements have no influence on the process. Perovskite phase was identified by x-ray diffraction and the average crystallite size was 77.22 nm using iron nitrate (III) as starting material while 42.23 nm were obtained using iron oxalate (III). Ammonium oxalate and equimolar mixtures of ammonium oxalate and oxalic acid were used as precipitant agents and the results shown that these reactants have no influence on the average crystallite size (42.95 nm and 42.23 nm). The material presents isotherms of type II, with especific surface of approximately 4,41m 2 g -1 .

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SrCo0.8Fe0.2O3−δ sorbent for high-temperature production of oxygen-enriched carbon dioxide stream

Cited by 38 publications

References 21 publications

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

Characteristics of SrCo_1-xFe_xO_3-_δPerovskite Powders with Improved O₂/CO₂Production Performance for Oxyfuel Combustion

Síntesis y Refinado por el Método Rietveld de la fase perovsquita obtenida a partir del Método de Co-precipitación vía Oxalato

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SrCo0.8Fe0.2O3−δ sorbent for high-temperature production of oxygen-enriched carbon dioxide stream

Cited by 38 publications

References 21 publications

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

A case study of the effect of grain size on the oxygen permeation flux of BSCF disk-shaped membrane fabricated by thermoplastic processing

Characteristics of SrCo1-xFexO3-δPerovskite Powders with Improved O2/CO2Production Performance for Oxyfuel Combustion

Síntesis y Refinado por el Método Rietveld de la fase perovsquita obtenida a partir del Método de Co-precipitación vía Oxalato

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Characteristics of SrCo_1-xFe_xO_3-_δPerovskite Powders with Improved O₂/CO₂Production Performance for Oxyfuel Combustion