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The synergetic effect of metal oxide support on Fe2O3 for chemical looping combustion: A theoretical study

This study deals with the synergetic effect of Al2O3 on Fe2O3 for chemical-looping combustion (CLC) of CO, in comparison with the synergetic effects of ZrO2 and MgO reported in our previous works. Property analysis of Fe2O3/Al2O3 shows that new bonds form cross the interface making Fe2O3 less prone... Full description

Journal Title: Applied Surface Science Oct 2013, Vol.282, pp.718-723
Main Author: Qin, Wu
Other Authors: Wang, Yang , Dong, Changqing , Zhang, Junjiao , Chen, Qiuluan , Yang, Yongping
Format: Electronic Article Electronic Article
Language: English
Subjects:
CO
Dft
Quelle: © ProQuest LLC All rights reserved
ID: ISSN: 0169-4332 ; DOI: 10.1016/j.apsusc.2013.06.041
Link: http://search.proquest.com/docview/1685765978/
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title: The synergetic effect of metal oxide support on Fe2O3 for chemical looping combustion: A theoretical study
format: Article
creator:
  • Qin, Wu
  • Wang, Yang
  • Dong, Changqing
  • Zhang, Junjiao
  • Chen, Qiuluan
  • Yang, Yongping
subjects:
  • Carbon Monoxide
  • Reduction
  • Zirconium Dioxide
  • Reactors
  • Aluminum Oxide
  • Oxidation
  • Magnesium Oxide
  • Charge
  • Combustion
  • Thin Films, Surfaces, and Interfaces (So)
  • Physical Properties (MD)
  • Physical Properties (Ep)
  • Physical Properties (Ed)
  • Physical Properties (EC)
  • Chemical-Looping Combustion
  • CO
  • Dft
ispartof: Applied Surface Science, Oct 2013, Vol.282, pp.718-723
description: This study deals with the synergetic effect of Al2O3 on Fe2O3 for chemical-looping combustion (CLC) of CO, in comparison with the synergetic effects of ZrO2 and MgO reported in our previous works. Property analysis of Fe2O3/Al2O3 shows that new bonds form cross the interface making Fe2O3 less prone to agglomerate on Al2O3, and 0.129 e transfers from Al2O3 to Fe2O3 to activate the electronic state of Fe2O3. Al2O3 [ZrO2 and MgO] favors the thermal stability of Fe2O3 by preventing the phase transformation, markedly regulates charge populations on the O-Fe bonds and their overlaps and hence tunes the redox properties of Fe2O3. The reaction mechanism analysis demonstrates that Al2O3 [ZrO2 and MgO] activates Fe2O3 for oxidizing CO into CO2 (accompanied by the reduction of Fe2O3) in the fuel reactor, which decrease the height of barrier energy (Ea), and the Ea follows clearly Fe2O3 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3/ZrO2. However, these supports usually increase the Ea for oxidizing Fe2O2 into Fe2O3 by O2 in the air reactor, and the Ea follows clearly Fe2O3/ZrO2 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3. It is argued that different supports could be applied to a given CLC system of different thermodynamic properties.
language: eng
source: © ProQuest LLC All rights reserved
identifier: ISSN: 0169-4332 ; DOI: 10.1016/j.apsusc.2013.06.041
fulltext: fulltext
issn:
  • 01694332
  • 0169-4332
url: Link


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titleThe synergetic effect of metal oxide support on Fe2O3 for chemical looping combustion: A theoretical study
creatorQin, Wu ; Wang, Yang ; Dong, Changqing ; Zhang, Junjiao ; Chen, Qiuluan ; Yang, Yongping
contributorQin, Wu (correspondence author)
ispartofApplied Surface Science, Oct 2013, Vol.282, pp.718-723
identifierISSN: 0169-4332 ; DOI: 10.1016/j.apsusc.2013.06.041
subjectCarbon Monoxide ; Reduction ; Zirconium Dioxide ; Reactors ; Aluminum Oxide ; Oxidation ; Magnesium Oxide ; Charge ; Combustion ; Thin Films, Surfaces, and Interfaces (So) ; Physical Properties (MD) ; Physical Properties (Ep) ; Physical Properties (Ed) ; Physical Properties (EC) ; Chemical-Looping Combustion ; CO ; Dft
descriptionThis study deals with the synergetic effect of Al2O3 on Fe2O3 for chemical-looping combustion (CLC) of CO, in comparison with the synergetic effects of ZrO2 and MgO reported in our previous works. Property analysis of Fe2O3/Al2O3 shows that new bonds form cross the interface making Fe2O3 less prone to agglomerate on Al2O3, and 0.129 e transfers from Al2O3 to Fe2O3 to activate the electronic state of Fe2O3. Al2O3 [ZrO2 and MgO] favors the thermal stability of Fe2O3 by preventing the phase transformation, markedly regulates charge populations on the O-Fe bonds and their overlaps and hence tunes the redox properties of Fe2O3. The reaction mechanism analysis demonstrates that Al2O3 [ZrO2 and MgO] activates Fe2O3 for oxidizing CO into CO2 (accompanied by the reduction of Fe2O3) in the fuel reactor, which decrease the height of barrier energy (Ea), and the Ea follows clearly Fe2O3 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3/ZrO2. However, these supports usually increase the Ea for oxidizing Fe2O2 into Fe2O3 by O2 in the air reactor, and the Ea follows clearly Fe2O3/ZrO2 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3. It is argued that different supports could be applied to a given CLC system of different thermodynamic properties.
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titleThe synergetic effect of metal oxide support on Fe2O3 for chemical looping combustion: A theoretical study
descriptionThis study deals with the synergetic effect of Al2O3 on Fe2O3 for chemical-looping combustion (CLC) of CO, in comparison with the synergetic effects of ZrO2 and MgO reported in our previous works. Property analysis of Fe2O3/Al2O3 shows that new bonds form cross the interface making Fe2O3 less prone to agglomerate on Al2O3, and 0.129 e transfers from Al2O3 to Fe2O3 to activate the electronic state of Fe2O3. Al2O3 [ZrO2 and MgO] favors the thermal stability of Fe2O3 by preventing the phase transformation, markedly regulates charge populations on the O-Fe bonds and their overlaps and hence tunes the redox properties of Fe2O3. The reaction mechanism analysis demonstrates that Al2O3 [ZrO2 and MgO] activates Fe2O3 for oxidizing CO into CO2 (accompanied by the reduction of Fe2O3) in the fuel reactor, which decrease the height of barrier energy (Ea), and the Ea follows clearly Fe2O3 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3/ZrO2. However, these supports usually increase the Ea for oxidizing Fe2O2 into Fe2O3 by O2 in the air reactor, and the Ea follows clearly Fe2O3/ZrO2 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3. It is argued that different supports could be applied to a given CLC system of different thermodynamic properties.
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titleThe synergetic effect of metal oxide support on Fe2O3 for chemical looping combustion: A theoretical study
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abstractThis study deals with the synergetic effect of Al2O3 on Fe2O3 for chemical-looping combustion (CLC) of CO, in comparison with the synergetic effects of ZrO2 and MgO reported in our previous works. Property analysis of Fe2O3/Al2O3 shows that new bonds form cross the interface making Fe2O3 less prone to agglomerate on Al2O3, and 0.129 e transfers from Al2O3 to Fe2O3 to activate the electronic state of Fe2O3. Al2O3 [ZrO2 and MgO] favors the thermal stability of Fe2O3 by preventing the phase transformation, markedly regulates charge populations on the O-Fe bonds and their overlaps and hence tunes the redox properties of Fe2O3. The reaction mechanism analysis demonstrates that Al2O3 [ZrO2 and MgO] activates Fe2O3 for oxidizing CO into CO2 (accompanied by the reduction of Fe2O3) in the fuel reactor, which decrease the height of barrier energy (Ea), and the Ea follows clearly Fe2O3 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3/ZrO2. However, these supports usually increase the Ea for oxidizing Fe2O2 into Fe2O3 by O2 in the air reactor, and the Ea follows clearly Fe2O3/ZrO2 >Fe2O3/Al2O3 >Fe2O3/MgO>Fe2O3. It is argued that different supports could be applied to a given CLC system of different thermodynamic properties.
doi10.1016/j.apsusc.2013.06.041
urlhttp://search.proquest.com/docview/1685765978/
date2013-10-01