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Effects of steam on CO2 absorption ability of calcium-based sorbent modified by peanut husk ash

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Abstract

The CO2 absorption ability of synthetic calcium-based sorbent modified by peanut husk ash (PHA) was tested by Thermal Gravimetric Analyzer (TGA), and the effects of steam and calcination temperature were investigated. The PHA composition was analyzed by X-Ray Fluorescence (XRF), the apparent morphology was characterized by scanning electron microscope (SEM), and the phases of the sorbent before and after calcination were examined by X-ray diffraction (XRD). The addition of PHA effectively improved the cyclic stability of the calcium-based sorbent. The optimal molar ratio of SiO2 in PHA to CaO was around 0.07. Steam had positive effect on keeping porosity of the sorbent at the chemical reaction stage, and improved its CO2 absorption ability. Steam also reduced the diffusion resistance of the product layer, and depressed the influence of high temperature calcination. It was also found that the steam hydration after calcination was an effective way to recover the absorption ability of the sorbent, while the hydration duration of 10 min was enough.

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Authors and Affiliations

  1. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yang Liu

  2. Key Laboratory of Advanced Energy and Power, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China

    Yang Liu, XinFang Yang, LiFeng Zhao, FuLin Lei & YunHan Xiao

  3. Research Center for Clean Energy and Power, Chinese Academy of Sciences, Lianyungang, 222069, China

    Yang Liu, XinFang Yang, LiFeng Zhao, FuLin Lei & YunHan Xiao

Authors
  1. Yang Liu
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  2. XinFang Yang
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  3. LiFeng Zhao
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  4. FuLin Lei
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  5. YunHan Xiao
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Correspondence to LiFeng Zhao.

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Liu, Y., Yang, X., Zhao, L. et al. Effects of steam on CO2 absorption ability of calcium-based sorbent modified by peanut husk ash. Sci. China Technol. Sci. 60, 953–962 (2017). https://doi.org/10.1007/s11431-016-9031-2

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  • DOI: https://doi.org/10.1007/s11431-016-9031-2

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