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HONEYCOMB-LIKE MESOPOROUS g-C3N4 FOR ELEMENTAL MERCURY REMOVAL FROM SIMULATED FLUE GAS

Author

Listed:
  • DONGJING LIU

    (School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, P. R. China)

  • ZHEN ZHANG

    (#x2020;College of Energy and Mechanical Engineering, Shanghai University of Electric Power, 200090 Shanghai, P. R. China)

  • LIANG LIU

    (School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, P. R. China)

  • JIANG WU

    (#x2020;College of Energy and Mechanical Engineering, Shanghai University of Electric Power, 200090 Shanghai, P. R. China)

Abstract

The π-conjugated graphitic carbon nitride (g-C3N4) has gained increasing attention due to its unique electronic property, accessible nanoporous framework, chemical and thermal stability. The nanopore structure of g-C3N4 is believed to be favorable for adsorption process owing to the improved mass transfer process. Here, a honeycomb-like mesoporous g-C3N4 is synthesized by direct thermal polymerization of the mixture of urea and ammonium carbonate. It displays an excellent affinity with elemental mercury at reaction temperatures of 50–200∘C. The optimal mass ratio of ammonium carbonate/urea is 2 with the highest Hg0 removal efficiency of 87.5% at 120∘C. NO has a negative effect on Hg0 removal, whereas SO2 slightly reinforces Hg0 adsorption in the presence of oxygen. The Hg0 is probably captured on the carbon atoms of g-C3N4 by producing a covalent carbon-mercury (C–Hg) bond via Lewis acid-base interactions.

Suggested Citation

  • Dongjing Liu & Zhen Zhang & Liang Liu & Jiang Wu, 2020. "HONEYCOMB-LIKE MESOPOROUS g-C3N4 FOR ELEMENTAL MERCURY REMOVAL FROM SIMULATED FLUE GAS," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 27(12), pages 1-9, December.
    • Handle: RePEc:wsi:srlxxx:v:27:y:2020:i:12:n:s0218625x20500171
    DOI: 10.1142/S0218625X20500171
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