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Effect of the B -Site Composition on the Oxygen Permeability and the CO2 Stability of Pr0.6Sr0.4Cox Fe1-x O3-δ (0.0 ⩽ x ⩽ 1.0) Membranes.

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Title: Effect of the B -Site Composition on the Oxygen Permeability and the CO2 Stability of Pr0.6Sr0.4Cox Fe1-x O3-δ (0.0 ⩽ x ⩽ 1.0) Membranes.
Authors: Partovi, Kaveh1 kaveh.partovi@pci.uni-hannover.de, Geppert, Benjamin1, Fangyi Liang1, Rüscher, Claus H.2, Caro, Jürgen1
Source: Chemistry of Materials. Apr2015, Vol. 27 Issue 8, p2911-2919. 9p.
Subjects: Praseodymium, Oxygen, Permeability, Carbon dioxide, Chemical stability, Perovskite
Abstract: Dense single-phase perovskite-type Pr0.6Sr0.4CoxFe1-xO3⩽δ (0.0 ⩽ x ⩽ 1.0) membranes (0.6 mm thick) were synthesized via EDTA-citric acid complexing route. Subsequently, the effect of various B-site Co/Fe compositions on oxygen permeability, temperature-dependent CO2 stability, microstructure, and electrical properties of the membranes were studied. The crystal structures and the high-temperature phase stability of the perovskite structure in a CO2-containing atmosphere were analyzed using X-ray diffraction. The highest oxygen permeation flux was observed for Pr0.6Sr0.4CoO3⩽δ with 1.57 cm3(STP) min-1 cm-2 and 1.37 cm3(STP) min-1 cm-2 at 1000 °C under air/He and air/CO2 gradients, respectively. Furthermore, the effect of CO2 as the sweep gas on the temperature-dependent oxygen permeability and stability of the membranes was studied. Basically, the membranes with lower Co contents were found to be less susceptible to CO2 exposure and their microstructures were less affected by CO2. The partial oxidation of methane (POM) to syngas was successfully performed for more than 80 h at 950 ½C using a PSCF membrane with a Co content of x = 0.2. The POM reaction shows an average CH4 conversion rate of <98% and a CO selectivity of <95%. [ABSTRACT FROM AUTHOR]
Copyright of Chemistry of Materials is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Effect of the B -Site Composition on the Oxygen Permeability and the CO&lt;subscript&gt;2&lt;/subscript&gt; Stability of Pr&lt;subscript&gt;0.6&lt;/subscript&gt;Sr&lt;subscript&gt;0.4&lt;/subscript&gt;Co&lt;subscript&gt;x&lt;/subscript&gt; Fe&lt;subscript&gt;1-x &lt;/subscript&gt;O&lt;subscript&gt;3-δ&lt;/subscript&gt; (0.0 ⩽ x ⩽ 1.0) Membranes.
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Chemistry+of+Materials%22&quot;&gt;Chemistry of Materials&lt;/searchLink&gt;. Apr2015, Vol. 27 Issue 8, p2911-2919. 9p.
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  Data: &lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Praseodymium%22&quot;&gt;Praseodymium&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Oxygen%22&quot;&gt;Oxygen&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Permeability%22&quot;&gt;Permeability&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Carbon+dioxide%22&quot;&gt;Carbon dioxide&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Chemical+stability%22&quot;&gt;Chemical stability&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;DE&quot; term=&quot;%22Perovskite%22&quot;&gt;Perovskite&lt;/searchLink&gt;
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  Data: Dense single-phase perovskite-type Pr0.6Sr0.4CoxFe1-xO3⩽δ (0.0 ⩽ x ⩽ 1.0) membranes (0.6 mm thick) were synthesized via EDTA-citric acid complexing route. Subsequently, the effect of various B-site Co/Fe compositions on oxygen permeability, temperature-dependent CO2 stability, microstructure, and electrical properties of the membranes were studied. The crystal structures and the high-temperature phase stability of the perovskite structure in a CO2-containing atmosphere were analyzed using X-ray diffraction. The highest oxygen permeation flux was observed for Pr0.6Sr0.4CoO3⩽δ with 1.57 cm3(STP) min-1 cm-2 and 1.37 cm3(STP) min-1 cm-2 at 1000 &#176;C under air/He and air/CO2 gradients, respectively. Furthermore, the effect of CO2 as the sweep gas on the temperature-dependent oxygen permeability and stability of the membranes was studied. Basically, the membranes with lower Co contents were found to be less susceptible to CO2 exposure and their microstructures were less affected by CO2. The partial oxidation of methane (POM) to syngas was successfully performed for more than 80 h at 950 &#189;C using a PSCF membrane with a Co content of x = 0.2. The POM reaction shows an average CH4 conversion rate of &lt;98% and a CO selectivity of &lt;95%. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Chemistry of Materials is the property of American Chemical Society and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1021/acs.chemmater.5b00166
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 9
        StartPage: 2911
    Subjects:
      – SubjectFull: Praseodymium
        Type: general
      – SubjectFull: Oxygen
        Type: general
      – SubjectFull: Permeability
        Type: general
      – SubjectFull: Carbon dioxide
        Type: general
      – SubjectFull: Chemical stability
        Type: general
      – SubjectFull: Perovskite
        Type: general
    Titles:
      – TitleFull: Effect of the B -Site Composition on the Oxygen Permeability and the CO2 Stability of Pr0.6Sr0.4Cox Fe1-x O3-δ (0.0 ⩽ x ⩽ 1.0) Membranes.
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            NameFull: Partovi, Kaveh
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            NameFull: Geppert, Benjamin
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            NameFull: Fangyi Liang
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            NameFull: Rüscher, Claus H.
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            NameFull: Caro, Jürgen
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            – D: 28
              M: 04
              Text: Apr2015
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              Y: 2015
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