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Prediction of coal fouling using an alternative index under the gasification condition

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  • Namkung, Hueon
  • Xu, Li-Hua
  • Kang, Tae-Jin
  • Kim, Dae Sung
  • Kwon, Hyok-Bo
  • Kim, Hyung-Taek

Abstract

Coal gasification was carried out in order to verify the coal fouling tendency in the drop tube furnace (DTF), which can simulate an entrained-bed gasifier. Thirteen pulverized coal samples, in the range of bituminous and sub-bituminous, were utilized, and compared, with predictions using a wide range of empirical indices. Large discrepancies were noted in most cases, with respect to experimental results, ash deposition rates, and different indices. Some indices used for anticipating fouling tendency are not co-related with the results of this experiment. A newly approached index, which is especially important considering the diffusivity parameter, looks at the ratio of acid and alkali mineral matters injected into gasifier and heat flux, indicates that traditional expressions are modified to account for other parameters which influence the ash deposition phenomenon. The alternative index resulted in improved correlations between predictions and experimental observations.

Suggested Citation

  • Namkung, Hueon & Xu, Li-Hua & Kang, Tae-Jin & Kim, Dae Sung & Kwon, Hyok-Bo & Kim, Hyung-Taek, 2013. "Prediction of coal fouling using an alternative index under the gasification condition," Applied Energy, Elsevier, vol. 102(C), pages 1246-1255.
    • Handle: RePEc:eee:appene:v:102:y:2013:i:c:p:1246-1255
    DOI: 10.1016/j.apenergy.2012.06.050
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    References listed on IDEAS

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    1. Giuffrida, Antonio & Romano, Matteo C. & Lozza, Giovanni, 2011. "Thermodynamic analysis of air-blown gasification for IGCC applications," Applied Energy, Elsevier, vol. 88(11), pages 3949-3958.
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    3. Sandberg, Jan & Karlsson, Christer & Fdhila, Rebei Bel, 2011. "A 7Â year long measurement period investigating the correlation of corrosion, deposit and fuel in a biomass fired circulated fluidized bed boiler," Applied Energy, Elsevier, vol. 88(1), pages 99-110, January.
    4. Sandberg, Jan & Fdhila, Rebei Bel & Dahlquist, Erik & Avelin, Anders, 2011. "Dynamic simulation of fouling in a circulating fluidized biomass-fired boiler," Applied Energy, Elsevier, vol. 88(5), pages 1813-1824, May.
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    1. Li, Fenghai & Liu, Quanrun & Li, Meng & Fang, Yitian, 2018. "Understanding fly-ash formation during fluidized-bed gasification of high-silicon-aluminum coal based on its characteristics," Energy, Elsevier, vol. 150(C), pages 142-152.
    2. Li, Fenghai & Li, Zhenzhu & Huang, Jiejie & Fang, Yitian, 2014. "Understanding mineral behaviors during anthracite fluidized-bed gasification based on slag characteristics," Applied Energy, Elsevier, vol. 131(C), pages 279-287.

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