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Experimental study on fly ash capture mercury in flue gas

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Abstract

Systematic experiments were conducted on a fixed-bed reactor to investigate the interaction between fly ash and mercury, the results implied that fly ash can capture mercury effectively. Among different fly ashes, the unburned carbon in the FA2 and FA3 fly ashes has the highest mercury capture capacity, up to 10.3 and 9.36 μg/g, respectively, which is close to that of commercial activated carbon. There is no obvious relationship between mercury content and carbon content or BET surface area of fly ash. Petrography classification standard was applied to distinguish fly ash carbon particles. Carbon content is not the only variable that controls mercury capture on fly ash, there are likely significant differences in the mercury capture capacities of the various carbon forms. Mercury capture capacity mainly depends on the content of anisotropy carbon particles with porous network structure.

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Authors and Affiliations

  1. State Key Laboratory of Coal Combustion, Huazhong University of Science & Technology, Wuhan, 430074, China

    YongChun Zhao, JunYing Zhang, Jing Liu & ChuGuang Zheng

  2. Instituto Nacional del Carbón (CSIC), Francisco Pintado Fe 26, 33011, Oviedo, Spain

    Mercedes Díaz-Somoano, Patricia Abad-Valle & M. Rosa Martínez-Tarazona

Authors
  1. YongChun Zhao
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  2. JunYing Zhang
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  3. Jing Liu
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  4. Mercedes Díaz-Somoano
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  5. Patricia Abad-Valle
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  6. M. Rosa Martínez-Tarazona
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  7. ChuGuang Zheng
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Correspondence to JunYing Zhang.

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Zhao, Y., Zhang, J., Liu, J. et al. Experimental study on fly ash capture mercury in flue gas. Sci. China Technol. Sci. 53, 976–983 (2010). https://doi.org/10.1007/s11431-009-0367-y

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  • DOI: https://doi.org/10.1007/s11431-009-0367-y

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