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Citation: ZHANG Li-qiang, CUI Lin, WANG Zhi-qiang, DONG Yong. Effects of microwave regeneration of activated carbon on its SO2 adsorption[J]. Journal of Fuel Chemistry and Technology, ;2014, 42(7): 890-896. shu

Effects of microwave regeneration of activated carbon on its SO2 adsorption

  • 1.

    National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University, Jinan 250061, China

  • Corresponding author: DONG Yong, 
  • Received Date: 27 December 2013
    Available Online: 31 March 2014

    Fund Project: 国家自然科学基金(51206097,51176103)。 (51206097,51176103)

  • The microwave regeneration of SO2 loaded activated carbon (AC) and its circulation adsorption characteristics were studied. The effects of microwave regeneration on the pore texture and surface chemistry of AC were analyzed by SEM, low temperature N2 adsorption, elemental analysis and Boehm titration. The results show that microwave irradiation is an effective regeneration method. In the suitable regenerative power, after many circulation adsorption/regeneration, the AC still remains high adsorption capacity. After 17th circulation, the adsorption capacity of AC is still higher than the primitive AC. Hower, there is obviously weight loss for AC during the regeneration because of the reaction between C and H2SO4. After first regeneration, the surface acidic functional groups of the AC almost decompose at high temperature, and the surface basic functional groups increase, so the SO2 adsorption capacity of AC is enhanced. After several adsorption/regeneration circulations, the surface acidic functional groups and basic functional groups remain stable, while the pore structure of AC becomes long and narrow for the activation of regeneration. And the specific surface area and volume of micropore increase, which benefits the SO2 adsorption on AC.
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