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Mn–Fe Oxides with Support of MgAl2O4, CeO2, ZrO2 and Y2O3–ZrO2 for Chemical-Looping Combustion and Chemical-Looping with Oxygen Uncoupling

Golnar Azimi (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Henrik Leion (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Tobias Mattisson (Institutionen för energi och miljö, Energiteknik) ; Magnus Rydén (Institutionen för energi och miljö, Energiteknik) ; Frans Snijkers ; Anders Lyngfelt (Institutionen för energi och miljö, Energiteknik)
Industrial & Engineering Chemistry Research (0888-5885). Vol. 53 (2014), 25, p. 10358-10365.
[Artikel, refereegranskad vetenskaplig]

The feasibility of utilizing a combined oxide (Mn0.75Fe0.25)(2)O-3 as an oxygen carrier for chemical-looping with oxygen uncoupling (CLOU) has been investigated. To increase the strength and attrition resistance of such particles, the oxygen carrier was prepared together with MgAl2O4, CeO2, ZrO2 and Y2O3-ZrO2 as supports. The oxygen-carrier particles were prepared using spray-drying. Each material was calcined for 4 h at 950, 1100 or 1200 degrees C. The materials were studied in a batch fluidized bed reactor to investigate their oxygen release and uptake potential and also their reactivity with CH4 and syngas. To gauge the mechanical stability of the different materials, the attrition resistance was measured in a jet-cup apparatus. With the exception of the material with MgAl2O4, the oxygen uncoupling property of the active combined oxides was largely kept intact using the added support materials. On the basis of the results from the reactivity tests and the measured attrition rates for all the particles, the material utilizing ZrO2 support seems to be the most promising candidate as an oxygen carrier for gaseous and solid fuels. However, due to phase transformations of the ZrO2 at higher temperatures, the calcination and operational temperature should likely not exceed 950 degrees C.

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Denna post skapades 2014-06-13. Senast ändrad 2016-04-28.
CPL Pubid: 199156


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)
Institutionen för energi och miljö, Energiteknik


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Chalmers infrastruktur