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CLC in packed beds using syngas and CuO/Al2O3: Model description and experimental validation

Author

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  • Hamers, H.P.
  • Gallucci, F.
  • Cobden, P.D.
  • Kimball, E.
  • van Sint Annaland, M.

Abstract

The objective of this work is to study the performance of the oxygen carrier in a packed bed with periodic switching between oxidizing and reducing conditions. In this paper the performance of CuO/Al2O3 as the oxygen carrier in a packed bed reactor with syngas as the fuel are investigated, while also studying the (possible) carbon deposition and the effect of sulphur impurities on the stability of the carrier. Both experiments and simulations are used in this work. Cyclic experiments (oxidation with air and reduction with syngas) have been carried out in a lab scale packed bed reactor with 13wt% CuO/Al2O3. The experimental results were well described by a 1D reactor model, provided that critical attention was given to the reaction rate for the complete reduction reaction, including a dramatic decrease in reaction rate at high solid conversions. Feeding syngas (pH2=pCO=0.1bar) resulted in 1.1% carbon deposition of the feed. Steam was proven to be more effective in reducing carbon deposition than CO2. Moreover, it has been found that CuO/Al2O3 catalyzed the water gas shift reaction and the reaction rate was not permanently affected by exposure to H2S, two key factors for CLC operation. The results of this work imply that CuO/Al2O3 is an effective oxygen carrier as the first packed bed reactor in a TSCLC process and that the developed model is able to describe the performance at larger scales accurately.

Suggested Citation

  • Hamers, H.P. & Gallucci, F. & Cobden, P.D. & Kimball, E. & van Sint Annaland, M., 2014. "CLC in packed beds using syngas and CuO/Al2O3: Model description and experimental validation," Applied Energy, Elsevier, vol. 119(C), pages 163-172.
    • Handle: RePEc:eee:appene:v:119:y:2014:i:c:p:163-172
    DOI: 10.1016/j.apenergy.2013.12.053
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    Citations

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    Cited by:

    1. Nandy, Anirban & Loha, Chanchal & Gu, Sai & Sarkar, Pinaki & Karmakar, Malay K. & Chatterjee, Pradip K., 2016. "Present status and overview of Chemical Looping Combustion technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 597-619.
    2. Prabu, V., 2015. "Integration of in-situ CO2-oxy coal gasification with advanced power generating systems performing in a chemical looping approach of clean combustion," Applied Energy, Elsevier, vol. 140(C), pages 1-13.
    3. Penthor, Stefan & Zerobin, Florian & Mayer, Karl & Pröll, Tobias & Hofbauer, Hermann, 2015. "Investigation of the performance of a copper based oxygen carrier for chemical looping combustion in a 120kW pilot plant for gaseous fuels," Applied Energy, Elsevier, vol. 145(C), pages 52-59.
    4. Zhang, Hao & Liu, Xiangyu & Hong, Hui & Jin, Hongguang, 2018. "Characteristics of a 10 kW honeycomb reactor for natural gas fueled chemical-looping combustion," Applied Energy, Elsevier, vol. 213(C), pages 285-292.
    5. Gu, Zhenhua & Li, Kongzhai & Wang, Hua & Qing, Shan & Zhu, Xing & Wei, Yonggang & Cheng, Xianming & Yu, He & Cao, Yan, 2016. "Bulk monolithic Ce–Zr–Fe–O/Al2O3 oxygen carriers for a fixed bed scheme of the chemical looping combustion: Reactivity of oxygen carrier," Applied Energy, Elsevier, vol. 163(C), pages 19-31.

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