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High-stability, high-capacity oxygen carriers: Iron oxide-perovskite composite materials for hydrogen production by chemical looping

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  • Dueso, Cristina
  • Thompson, Claire
  • Metcalfe, Ian

Abstract

Iron oxide has been widely used as an oxygen carrier material (OCM) for hydrogen production by chemical looping due to its favourable thermodynamic properties. In spite of this, iron oxide loses much of its activity after redox cycling mainly due to sintering and agglomeration. Perovskites, such as La0.7Sr0.3FeO3-δ (LSF731), have been suggested as potential candidate OCMs for hydrogen production due to their excellent oxygen transport properties and stability under cycling. However, hydrogen production per cycle for a similar carrier weight is lower than with iron oxide. This work proposes the use of composite OCMs made of iron oxide clusters embedded in an LSF731 matrix. The perovskite matrix facilitates oxygen transport to the iron oxide clusters while preventing agglomeration. Two preparation methods, mechanical mixing and a modified Pechini method, were used to obtain composite materials with different iron oxide weight fractions, 11 and 30wt.%. The reactivity of these OCMs was studied in a thermogravimetric analyser. Hydrogen production and carrier stability were investigated in a microreactor over 25 redox cycles while periodically feeding carbon monoxide and water in order to produce carbon dioxide and hydrogen in separate streams. Hydrogen production was stable over 25 cycles for LSF731 and the composite OCM with 30wt.% iron oxide produced by the modified Pechini method but iron oxide particles alone underwent a decrease in the hydrogen production with cycling. The hydrogen production during the 25th cycle was eight times higher for the composite material than for iron oxide alone and four times higher than for LSF731. The hydrogen production was therefore also higher than that expected from a simple combination of the iron oxide and LSF731 alone, indicating a synergetic effect whereby the LSF731 may have a higher effective oxygen capacity when in the form of the composite material.

Suggested Citation

  • Dueso, Cristina & Thompson, Claire & Metcalfe, Ian, 2015. "High-stability, high-capacity oxygen carriers: Iron oxide-perovskite composite materials for hydrogen production by chemical looping," Applied Energy, Elsevier, vol. 157(C), pages 382-390.
  • Handle: RePEc:eee:appene:v:157:y:2015:i:c:p:382-390
    DOI: 10.1016/j.apenergy.2015.05.062
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    Citations

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    Cited by:

    1. Luo, Ming & Yi, Yang & Wang, Shuzhong & Wang, Zhuliang & Du, Min & Pan, Jianfeng & Wang, Qian, 2018. "Review of hydrogen production using chemical-looping technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P2), pages 3186-3214.
    2. Hafizi, A. & Rahimpour, M.R. & Hassanajili, S., 2016. "High purity hydrogen production via sorption enhanced chemical looping reforming: Application of 22Fe2O3/MgAl2O4 and 22Fe2O3/Al2O3 as oxygen carriers and cerium promoted CaO as CO2 sorbent," Applied Energy, Elsevier, vol. 169(C), pages 629-641.
    3. Qiu, Yu & Zhang, Shuai & Cui, Dongxu & Li, Min & Zeng, Jimin & Zeng, Dewang & Xiao, Rui, 2019. "Enhanced hydrogen production performance at intermediate temperatures through the synergistic effects of binary oxygen carriers," Applied Energy, Elsevier, vol. 252(C), pages 1-1.
    4. Marek, Ewa & Hu, Wenting & Gaultois, Michael & Grey, Clare P. & Scott, Stuart A., 2018. "The use of strontium ferrite in chemical looping systems," Applied Energy, Elsevier, vol. 223(C), pages 369-382.
    5. Albrecht, Kevin J. & Jackson, Gregory S. & Braun, Robert J., 2016. "Thermodynamically consistent modeling of redox-stable perovskite oxides for thermochemical energy conversion and storage," Applied Energy, Elsevier, vol. 165(C), pages 285-296.
    6. Hafizi, A. & Rahimpour, M.R. & Hassanajili, Sh., 2016. "Hydrogen production via chemical looping steam methane reforming process: Effect of cerium and calcium promoters on the performance of Fe2O3/Al2O3 oxygen carrier," Applied Energy, Elsevier, vol. 165(C), pages 685-694.

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