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Performance of a perovskite-structured calcium manganite oxygen carrier produced from natural ores in a batch reactor and in operation of a chemical-looping combustion reactor system

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Název: Performance of a perovskite-structured calcium manganite oxygen carrier produced from natural ores in a batch reactor and in operation of a chemical-looping combustion reactor system
Autoři: Li, Xiaoyun, 1990, Faust, Robin, 1992, Purnomo, Victor, 1992, Mei, Daofeng, Linderholm, Carl Johan, 1976, Lyngfelt, Anders, 1955, Mattisson, Tobias, 1970
Zdroj: Chemical Engineering Journal. 497
Témata: Simple production method, Manganese ore, Perovskite structure, Oxygen carrier, Chemical looping with oxygen uncoupling, Calcium manganite
Popis: The potential for low cost of CO2 capture using chemical-looping combustion (CLC) should not be compromised by costs associated with the oxygen carrier. This justifies studies of oxygen carrier materials with reasonable production costs. In this study, a perovskite calcium manganite (CaMnO3-δ), was synthesized from manganese ore and limestone through a straightforward process involving mixing with polyvinyl-alcohol, sintering, crushing and sieving. The calcium manganite produced exhibited two primary crystalline phases: CaMnO3 (perovskite) and CaMn2O4 (marokite). Experiments were conducted using both a batch fluidized-bed reactor and a 300 W CLC reactor system in continuous operation to assess the oxygen uncoupling and reactivity of the calcium manganite. The results show that the oxygen uncoupling ability increases with temperature. Full syngas conversion was achieved at relatively low temperatures and low fuel-reactor bed mass over fuel power ratio in the 300 W unit. Elevated temperatures and ratio of fuel-reactor bed mass over fuel power enhance methane conversion significantly. The attrition of the calcium manganite was low, around 0.1 wt%/h for the last 15 h operation with methane. Batch reactor tests of fresh and used materials showed that there was no reduction in reactivity after 29 h of fuel operation.
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Přístupová URL adresa: https://research.chalmers.se/publication/542474
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  Label: Title
  Group: Ti
  Data: Performance of a perovskite-structured calcium manganite oxygen carrier produced from natural ores in a batch reactor and in operation of a chemical-looping combustion reactor system
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Li%2C+Xiaoyun%22">Li, Xiaoyun</searchLink>, 1990<br /><searchLink fieldCode="AR" term="%22Faust%2C+Robin%22">Faust, Robin</searchLink>, 1992<br /><searchLink fieldCode="AR" term="%22Purnomo%2C+Victor%22">Purnomo, Victor</searchLink>, 1992<br /><searchLink fieldCode="AR" term="%22Mei%2C+Daofeng%22">Mei, Daofeng</searchLink><br /><searchLink fieldCode="AR" term="%22Linderholm%2C+Carl+Johan%22">Linderholm, Carl Johan</searchLink>, 1976<br /><searchLink fieldCode="AR" term="%22Lyngfelt%2C+Anders%22">Lyngfelt, Anders</searchLink>, 1955<br /><searchLink fieldCode="AR" term="%22Mattisson%2C+Tobias%22">Mattisson, Tobias</searchLink>, 1970
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <i>Chemical Engineering Journal</i>. 497
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Simple+production+method%22">Simple production method</searchLink><br /><searchLink fieldCode="DE" term="%22Manganese+ore%22">Manganese ore</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite+structure%22">Perovskite structure</searchLink><br /><searchLink fieldCode="DE" term="%22Oxygen+carrier%22">Oxygen carrier</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+looping+with+oxygen+uncoupling%22">Chemical looping with oxygen uncoupling</searchLink><br /><searchLink fieldCode="DE" term="%22Calcium+manganite%22">Calcium manganite</searchLink>
– Name: Abstract
  Label: Description
  Group: Ab
  Data: The potential for low cost of CO2 capture using chemical-looping combustion (CLC) should not be compromised by costs associated with the oxygen carrier. This justifies studies of oxygen carrier materials with reasonable production costs. In this study, a perovskite calcium manganite (CaMnO3-δ), was synthesized from manganese ore and limestone through a straightforward process involving mixing with polyvinyl-alcohol, sintering, crushing and sieving. The calcium manganite produced exhibited two primary crystalline phases: CaMnO3 (perovskite) and CaMn2O4 (marokite). Experiments were conducted using both a batch fluidized-bed reactor and a 300 W CLC reactor system in continuous operation to assess the oxygen uncoupling and reactivity of the calcium manganite. The results show that the oxygen uncoupling ability increases with temperature. Full syngas conversion was achieved at relatively low temperatures and low fuel-reactor bed mass over fuel power ratio in the 300 W unit. Elevated temperatures and ratio of fuel-reactor bed mass over fuel power enhance methane conversion significantly. The attrition of the calcium manganite was low, around 0.1 wt%/h for the last 15 h operation with methane. Batch reactor tests of fresh and used materials showed that there was no reduction in reactivity after 29 h of fuel operation.
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      – Type: doi
        Value: 10.1016/j.cej.2024.154516
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      – Text: English
    Subjects:
      – SubjectFull: Simple production method
        Type: general
      – SubjectFull: Manganese ore
        Type: general
      – SubjectFull: Perovskite structure
        Type: general
      – SubjectFull: Oxygen carrier
        Type: general
      – SubjectFull: Chemical looping with oxygen uncoupling
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      – SubjectFull: Calcium manganite
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      – TitleFull: Performance of a perovskite-structured calcium manganite oxygen carrier produced from natural ores in a batch reactor and in operation of a chemical-looping combustion reactor system
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            NameFull: Li, Xiaoyun
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              Type: published
              Y: 2024
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            – TitleFull: Chemical Engineering Journal
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