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On the relevant role of solids residence time on their CO2 capture performance in the Calcium Looping technology

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  • Perejón, Antonio
  • Miranda-Pizarro, Juan
  • Pérez-Maqueda, Luis A.
  • Valverde, Jose Manuel

Abstract

The multicycle CO2 capture performance of CaO derived from natural limestone and dolomite has been investigated by means of thermogravimetry under realistic Calcium-Looping conditions, which necessarily involve high CO2 concentration and high temperatures in the calcination stage and fast transitions between the carbonation and calcination stages. Natural dolomite allows reducing the calcination temperature as compared to limestone while high calcination efficiency is maintained. This could help reducing the energy penalty of the CaL process thus further enhancing the industrial competitiveness for the integration of this technology into fossil fuel power plants. Importantly, the CO2 capture capacity of the sorbents is critically affected by the solids residence time in the carbonation and calcination stages within the feasible range in practice. Thus, carbonation/calcination residence times play a critical role on the multicycle CO2 capture performance, which has been generally dismissed in previous studies. A main observation is the enhancement of carbonation in the solid-state diffusion controlled phase, which is against the commonly accepted conception that the only relevant phase in the carbonation stage is the fast reaction-controlled stage on the surface of the solids. Thus, the CO2 capture efficiency may be significantly enhanced by increasing the solids residence time in the carbonator.

Suggested Citation

  • Perejón, Antonio & Miranda-Pizarro, Juan & Pérez-Maqueda, Luis A. & Valverde, Jose Manuel, 2016. "On the relevant role of solids residence time on their CO2 capture performance in the Calcium Looping technology," Energy, Elsevier, vol. 113(C), pages 160-171.
    • Handle: RePEc:eee:energy:v:113:y:2016:i:c:p:160-171
    DOI: 10.1016/j.energy.2016.07.028
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    Cited by:

    1. Puthiya Veetil, Sanoop Kumar & Rebane, Kaarel & Yörük, Can Rüstü & Lopp, Margus & Trikkel, Andres & Hitch, Michael, 2021. "Aqueous mineral carbonation of oil shale mine waste (limestone): A feasibility study to develop a CO2 capture sorbent," Energy, Elsevier, vol. 221(C).
    2. Chen, Xiaoyi & Jin, Xiaogang & Liu, Zhimin & Ling, Xiang & Wang, Yan, 2018. "Experimental investigation on the CaO/CaCO3 thermochemical energy storage with SiO2 doping," Energy, Elsevier, vol. 155(C), pages 128-138.
    3. Tritippayanon, Rattapong & Piemjaiswang, Ratchanon & Piumsomboon, Pornpote & Chalermsinsuwan, Benjapon, 2019. "Computational fluid dynamics of sulfur dioxide and carbon dioxide capture using mixed feeding of calcium carbonate/calcium oxide in an industrial scale circulating fluidized bed boiler," Applied Energy, Elsevier, vol. 250(C), pages 493-502.
    4. Ma, Zhangke & Li, Yingjie & Zhang, Wan & Wang, Yuzhuo & Zhao, Jianli & Wang, Zeyan, 2020. "Energy storage and attrition performance of limestone under fluidization during CaO/CaCO3 cycles," Energy, Elsevier, vol. 207(C).

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