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Processing and characterization of Fe-based oxygen carriers for chemical looping for hydrogen production

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Abstract
Until now various oxygen carrier particles have been proposed for use in chemical looping processes. Their chemical performance is determined not only by their composition and their microstructure/morphology but also by the reaction condition of the processes in which they are utilized. In the present work, iron based oxygen carriers supported on Al2O3 and MgAl2O4 were spray dried and heat treated to have a suitable morphology and sufficient mechanical properties for chemical looping. The MgAl2O4-support was in situ generated from MgO and Al2O3 by reaction sintering. After physical characterization and determining their compressive strength the oxygen carriers were tested in the chemical looping reforming process for producing syngas in a lab-scale batch fluidized-bed reactor. The suitability of utilizing steam regeneration was investigated for both oxygen carriers by relating their chemical performance to their composition. It was shown that the Al2O3-supported oxygen carrier deactivated after 9 cycles of steam regeneration because of the accumulation of an in-situ formed FeAl2O4-phase due to an irreversible reaction between support and the active phase. This deactivation was successfully avoided by replacing the Al2O3-support with MgAl2O4. This Fe2O3/MgAl2O4 oxygen carrier could be subsequently regenerated by steam, making it suitable for chemical looping for hydrogen generation.
Keywords
Chemical looping, Hydrogen generation, Spray drying, Oxygen carriers, Iron oxide, Magnesium aluminate, IRON-OXIDE, UNCOUPLING CLOU, METAL-OXIDES, SOLID FUELS, CO2 CAPTURE, CLC UNIT, COMBUSTION, METHANE, SYNGAS, PERFORMANCE

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MLA
De Vos, Yoran, Marijke Jacobs, Isabel Van Driessche, et al. “Processing and Characterization of Fe-based Oxygen Carriers for Chemical Looping for Hydrogen Production.” INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL 70 (2018): 12–21. Print.
APA
De Vos, Y., Jacobs, M., Van Driessche, I., Van Der Voort, P., Snijkers, F., & Verberckmoes, A. (2018). Processing and characterization of Fe-based oxygen carriers for chemical looping for hydrogen production. INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, 70, 12–21.
Chicago author-date
De Vos, Yoran, Marijke Jacobs, Isabel Van Driessche, Pascal Van Der Voort, Frans Snijkers, and An Verberckmoes. 2018. “Processing and Characterization of Fe-based Oxygen Carriers for Chemical Looping for Hydrogen Production.” International Journal of Greenhouse Gas Control 70: 12–21.
Chicago author-date (all authors)
De Vos, Yoran, Marijke Jacobs, Isabel Van Driessche, Pascal Van Der Voort, Frans Snijkers, and An Verberckmoes. 2018. “Processing and Characterization of Fe-based Oxygen Carriers for Chemical Looping for Hydrogen Production.” International Journal of Greenhouse Gas Control 70: 12–21.
Vancouver
1.
De Vos Y, Jacobs M, Van Driessche I, Van Der Voort P, Snijkers F, Verberckmoes A. Processing and characterization of Fe-based oxygen carriers for chemical looping for hydrogen production. INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL. 2018;70:12–21.
IEEE
[1]
Y. De Vos, M. Jacobs, I. Van Driessche, P. Van Der Voort, F. Snijkers, and A. Verberckmoes, “Processing and characterization of Fe-based oxygen carriers for chemical looping for hydrogen production,” INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL, vol. 70, pp. 12–21, 2018.
@article{8552709,
  abstract     = {Until now various oxygen carrier particles have been proposed for use in chemical looping processes. Their chemical performance is determined not only by their composition and their microstructure/morphology but also by the reaction condition of the processes in which they are utilized. In the present work, iron based oxygen carriers supported on Al2O3 and MgAl2O4 were spray dried and heat treated to have a suitable morphology and sufficient mechanical properties for chemical looping. The MgAl2O4-support was in situ generated from MgO and Al2O3 by reaction sintering. After physical characterization and determining their compressive strength the oxygen carriers were tested in the chemical looping reforming process for producing syngas in a lab-scale batch fluidized-bed reactor. The suitability of utilizing steam regeneration was investigated for both oxygen carriers by relating their chemical performance to their composition. It was shown that the Al2O3-supported oxygen carrier deactivated after 9 cycles of steam regeneration because of the accumulation of an in-situ formed FeAl2O4-phase due to an irreversible reaction between support and the active phase. This deactivation was successfully avoided by replacing the Al2O3-support with MgAl2O4. This Fe2O3/MgAl2O4 oxygen carrier could be subsequently regenerated by steam, making it suitable for chemical looping for hydrogen generation.},
  author       = {De Vos, Yoran and Jacobs, Marijke and Van Driessche, Isabel and Van Der Voort, Pascal and Snijkers, Frans and Verberckmoes, An},
  issn         = {1750-5836},
  journal      = {INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL},
  keywords     = {Chemical looping,Hydrogen generation,Spray drying,Oxygen carriers,Iron oxide,Magnesium aluminate,IRON-OXIDE,UNCOUPLING CLOU,METAL-OXIDES,SOLID FUELS,CO2 CAPTURE,CLC UNIT,COMBUSTION,METHANE,SYNGAS,PERFORMANCE},
  language     = {eng},
  pages        = {12--21},
  title        = {Processing and characterization of Fe-based oxygen carriers for chemical looping for hydrogen production},
  url          = {http://dx.doi.org/10.1016/j.ijggc.2018.01.007},
  volume       = {70},
  year         = {2018},
}

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