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Rotating bed reactor for CLC: Bed characteristics dependencies on internal gas mixing

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  • Håkonsen, Silje Fosse
  • Grande, Carlos A.
  • Blom, Richard

Abstract

A newly designed continuous lab-scale rotating bed reactor for chemical looping combustion using CuO/Al2O3 oxygen carrier spheres and methane as fuel gives around 90% CH4 conversion and >90% CO2 capture efficiency based on converted methane at 800°C. However, from a series of experiments using a broad range of operating conditions potential CO2 purities only in the range 20–65% were yielded, mostly due to nitrogen slip from the air side of the reactor into the effluent CO2 stream. A mathematical model was developed intending to understand the air-mixing phenomena. The model clearly reflects the gas slippage tendencies observed when varying the process conditions such as rotation frequency, gas flow and the flow if inert gas in the two sectors dividing the air and fuel side of the reactor. Based on the results, it is believed that significant improvements can be made to reduce gas mixing in future modified and scaled-up reactor versions.

Suggested Citation

  • Håkonsen, Silje Fosse & Grande, Carlos A. & Blom, Richard, 2014. "Rotating bed reactor for CLC: Bed characteristics dependencies on internal gas mixing," Applied Energy, Elsevier, vol. 113(C), pages 1952-1957.
    • Handle: RePEc:eee:appene:v:113:y:2014:i:c:p:1952-1957
    DOI: 10.1016/j.apenergy.2013.04.044
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    References listed on IDEAS

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    1. Erlach, B. & Schmidt, M. & Tsatsaronis, G., 2011. "Comparison of carbon capture IGCC with pre-combustion decarbonisation and with chemical-looping combustion," Energy, Elsevier, vol. 36(6), pages 3804-3815.
    2. Kvamsdal, Hanne M. & Jordal, Kristin & Bolland, Olav, 2007. "A quantitative comparison of gas turbine cycles with CO2 capture," Energy, Elsevier, vol. 32(1), pages 10-24.
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    Cited by:

    1. Tomasz Czakiert & Jaroslaw Krzywanski & Anna Zylka & Wojciech Nowak, 2022. "Chemical Looping Combustion: A Brief Overview," Energies, MDPI, vol. 15(4), pages 1-19, February.
    2. 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.
    3. Mayer, Karl & Penthor, Stefan & Pröll, Tobias & Hofbauer, Hermann, 2015. "The different demands of oxygen carriers on the reactor system of a CLC plant – Results of oxygen carrier testing in a 120kWth pilot plant," Applied Energy, Elsevier, vol. 157(C), pages 323-329.
    4. Cabello, Arturo & Abad, Alberto & Gayán, Pilar & García-Labiano, Francisco & de Diego, Luis F. & Adánez, Juan, 2021. "Increasing energy efficiency in chemical looping combustion of methane by in-situ activation of perovskite-based oxygen carriers," Applied Energy, Elsevier, vol. 287(C).
    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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