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Desulfurization Performances of Activated Coke Prepared from Fine Blue-Coke

Abstract

Activated coke was prepared by CO2 activation using solid waste fine blue-coke as main raw material and coal direct liquefaction residue (DCLR) as binder. The activated coke was characterized by BET, XRD, and infrared analysis. The flue gas desulfurization experiment was carried out with a fixed bed reactor and activated coke as the adsorbent. The experimental results show that coal direct liquefaction residue pyrolysis process will produce a large number of cohesive colloids, further increasing the strength of the activated coke. BET analysis shows that there is abundant microporous structure in the activated coke, infrared analysis shows that the activated coke contains abundant surface functional groups, and XRD shows that the crystallization degree of the activated coke is high. At lower temperature, SO2 and O2 have competitive adsorption on the surface of activated coke, if the concentration of water vapor is too high, a water film will be formed on the surface of activated coke, which will hinder the adsorption of SO2 by activated coke. The initial concentration of SO2 is 700 ppm, the adsorption temperature is 80 °C, the oxygen concentration is 9%, and the concentration of water vapor is 8%. The removal of SO2 by activated coke is better, and the desulfurization rate reaches 97%.

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Correspondence to Yuhong Tian or Xinzhe Lan.

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Tian, Y., Hu, S., Jing, X.d. et al. Desulfurization Performances of Activated Coke Prepared from Fine Blue-Coke. Water Air Soil Pollut 231, 32 (2020). https://doi.org/10.1007/s11270-019-4390-8

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Keywords

  • Fine blue-coke
  • Coal direct liquefaction residue (DCLR)
  • Activated coke
  • Compressive strength
  • Desulfurization