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Activation of ilmenite as an oxygen carrier for solid-fueled chemical looping combustion

Author

Listed:
  • Chen, Liangyong
  • Bao, Jinhua
  • Kong, Liang
  • Combs, Megan
  • Nikolic, Heather S.
  • Fan, Zhen
  • Liu, Kunlei

Abstract

Ilmenite ore is one of the promising oxygen carriers (OCs) used for coal-fueled Chemical-Looping Combustion (CLC) for electricity generation and CO2 capture. However, the low reactivity and natural activation of ilmenite OC are two major constrains impeding its application. This effort is to improve ilmenite OC’s performance by introducing a small amount of foreign elements, including alkali or alkaline earth metals (K and Ca) and transition metals (Cu, Mn, and Ni). Coating and re-granulation methods were used to prepare OCs where ilmenite ore was the primary constituent. The reactivity, transport capacity, and selectivity of these ilmenite-based OCs with wet syngas, as well as their performances in coal char-fueled CLC were investigated using a TGA, fixed- and fluidized-bed reactors. The addition of K-element significantly improved the OC’s reactivity with wet syngas and coal char. The strong catalytic function for WGSR from K-added OCs was found to play a vital role. Cu-coating hindered effectively Fe-element segregation on the surface of ilmenite OC during cyclic reaction, and the OC structural integrity was well maintained. Ca-, Ni- and Mn-added ilmenite OCs did not show promising prospects. The gasification rate and combustion efficiency could be respectively correlated to the reactivity and selectivity of different OCs except for the K-added samples.

Suggested Citation

  • Chen, Liangyong & Bao, Jinhua & Kong, Liang & Combs, Megan & Nikolic, Heather S. & Fan, Zhen & Liu, Kunlei, 2017. "Activation of ilmenite as an oxygen carrier for solid-fueled chemical looping combustion," Applied Energy, Elsevier, vol. 197(C), pages 40-51.
    • Handle: RePEc:eee:appene:v:197:y:2017:i:c:p:40-51
    DOI: 10.1016/j.apenergy.2017.03.127
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    References listed on IDEAS

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    1. Chen, Liangyong & Bao, Jinhua & Kong, Liang & Combs, Megan & Nikolic, Heather S. & Fan, Zhen & Liu, Kunlei, 2016. "The direct solid-solid reaction between coal char and iron-based oxygen carrier and its contribution to solid-fueled chemical looping combustion," Applied Energy, Elsevier, vol. 184(C), pages 9-18.
    2. Ströhle, Jochen & Orth, Matthias & Epple, Bernd, 2015. "Chemical looping combustion of hard coal in a 1MWth pilot plant using ilmenite as oxygen carrier," Applied Energy, Elsevier, vol. 157(C), pages 288-294.
    3. Arjmand, Mehdi & Leion, Henrik & Mattisson, Tobias & Lyngfelt, Anders, 2014. "Investigation of different manganese ores as oxygen carriers in chemical-looping combustion (CLC) for solid fuels," Applied Energy, Elsevier, vol. 113(C), pages 1883-1894.
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    1. Schneider, T. & Moffitt, J. & Volz, N. & Müller, D. & Karl, J., 2022. "Long-term effects of ilmenite on a micro-scale bubbling fluidized bed combined heat and power pilot plant for oxygen carrier aided combustion of wood," Applied Energy, Elsevier, vol. 314(C).
    2. Lin, Shen & Gu, Zhenhua & Zhu, Xing & Wei, Yonggang & Long, Yanhui & Yang, Kun & He, Fang & Wang, Hua & Li, Kongzhai, 2020. "Synergy of red mud oxygen carrier with MgO and NiO for enhanced chemical-looping combustion," Energy, Elsevier, vol. 197(C).
    3. Garcia, Eduardo & Liu, Hao, 2022. "Ilmenite as alternative bed material for the combustion of coal and biomass blends in a fluidised bed combustor to improve combustion performance and reduce agglomeration tendency," Energy, Elsevier, vol. 239(PA).
    4. Kuang, Cao & Wang, Shuzhong & Luo, Ming & Cai, Jianjun & Zhao, Jun, 2020. "Investigation of CuO-based oxygen carriers modified by three different ores in chemical looping combustion with solid fuels," Renewable Energy, Elsevier, vol. 154(C), pages 937-948.
    5. Tian, Xin & Zhao, Haibo & Ma, Jinchen, 2017. "Cement bonded fine hematite and copper ore particles as oxygen carrier in chemical looping combustion," Applied Energy, Elsevier, vol. 204(C), pages 242-253.

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